Scolaris Content Display Scolaris Content Display

Cochrane Database of Systematic Reviews

Silodosina para el tratamiento de los síntomas urinarios bajos compatibles con hiperplasia prostática benigna

Información

DOI:
https://doi.org/10.1002/14651858.CD012615.pub2Copiar DOI
Base de datos:
  1. Cochrane Database of Systematic Reviews
Versión publicada:
  1. 22 noviembre 2017see what's new
Tipo:
  1. Intervention
Etapa:
  1. Review
Grupo Editorial Cochrane:
  1. Grupo Cochrane de Urología

Copyright:
  1. Copyright © 2017 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

Cifras del artículo

Altmetric:

Citado por:

Citado 0 veces por enlace Crossref Cited-by

Contraer

Autores

  • Jae Hung Jung

    Correspondencia a: Department of Urology, Yonsei University Wonju College of Medicine, Wonju, Korea, South

    [email protected]

    Department of Urology, University of Minnesota, Minneapolis, USA

    Urology Section, Minneapolis VA Health Care System, Minneapolis, USA

  • Jiye Kim

    Department of Plastic Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea, South

  • Roderick MacDonald

    General Internal Medicine (111‐0), Minneapolis VA Medical Center, Minneapolis, USA

  • Balaji Reddy

    Department of Urology, Massachusetts General Hospital, Boston, USA

  • Myung Ha Kim

    Yonsei Wonju Medical Library, Yonsei University Wonju College of Medicine, Wonju, Korea, South

  • Philipp Dahm

    Department of Urology, University of Minnesota, Minneapolis, USA

    Urology Section, Minneapolis VA Health Care System, Minneapolis, USA

Contributions of authors

JH Jung (JHJ): conception and study design, drafting the protocol, searching for trials, study selection, extracting data, assessing risk of bias, performing data analysis, interpretation of data, and drafting the review.

J Kim (JK): drafting the protocol, searching for trials, study selection, extracting data, assessing risk of bias, performing data analysis, and drafting the review.

R MacDonald (RM): study design, drafting the protocol, providing clinical and methodological advices on the review, and final approval.

B Reddy (BR): providing clinical and methodological advice on the review, and drafting the review.

MH Kim (MHK): creating search strategies, drafting the protocol, and searching for trials.

P Dahm (PD): conception and study design, providing clinical and methodological advice on the review, and final approval.

Sources of support

Internal sources

  • Yonsei University Wonju College of Medicine, Korea, South.

  • Minneapolis VA Medical Center, Minneapolis, Minnesota, USA.

  • University of Minnesota, Minneapolis, Minnesota, USA.

External sources

  • No sources of support provided, Other.

Declarations of interest

JHJ: none known

JK: none known

RM: none known

BR: none known

MHK: none known

PD: PD serves as Co‐ordinating Editor of Cochrane Urology. However, he was not involved in the editorial processing or decision‐making for this review. Other editors of Cochrane Urology managed the editorial process, including final sign‐off for this review.

Acknowledgements

We acknowledge the support received from the authors of included studies, Christopher R. Chapple, Gyung‐woo Jung, Leonard S. Marks, Satabdi Pande, Hideki Takeshita, Kenya Yamaguchi, Tomonori Yamanishi, and Teruhiko Yokoyama by providing additional data. We are very grateful to Christopher Filson, Herney Andrés García‐Perdomo, Hong Wook Kim, Stavros Gravas, and Valter Silva for having served as peer reviewers. We thank Cochrane Urology and our contact editors Mari Imamura and Muhammad Imran Omar for supporting this review.

Version history

Published

Title

Stage

Authors

Version

2017 Nov 22

Silodosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia

Review

Jae Hung Jung, Jiye Kim, Roderick MacDonald, Balaji Reddy, Myung Ha Kim, Philipp Dahm

https://doi.org/10.1002/14651858.CD012615.pub2

2017 Mar 28

Silodosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia

Protocol

Jae Hung Jung, Roderick MacDonald, Jiye Kim, Myung Ha Kim, Philipp Dahm

https://doi.org/10.1002/14651858.CD012615

Differences between protocol and review

This review was based on a published protocol with differences as described here.

  • Types of studies: we included parallel, randomized trials as well as cross‐over designs. We revised the 'Types of studies' and 'Unit of analysis issues' section accordingly.

  • Types of participants: we redefined the type of participants as adult men aged 40 years and over. Given that alpha‐blockers are used to treat patients with all degrees of LUTS, we deleted the IPSS criterion under ‘Types of participants’.

  • Types of outcome measures: we renamed primary and secondary outcomes and added details in 'method and timing of outcome measurement' for all outcomes.

  • Assessment of risk of bias in included studies: we added details with regards to assessing risk of bias. We considered all outcomes susceptible to performance bias and assessed them in one group. We redefined subjective and objective outcomes for detection bias.

  • Subgroup and sensitivity analysis: we planned to perform subgroup and sensitivity analyses limited to the primary outcomes.

  • Appendix: we have summarized the search strategy for each database in Appendix 1.

Notes

We have based parts of the Methods section of this protocol on a standard template developed by the Cochrane Metabolic and Endocrine Disorders Group, which has been modified and adapted for use by Cochrane Urology.

Keywords

MeSH

PICO

Population
Intervention
Comparison
Outcome

El uso y la enseñanza del modelo PICO están muy extendidos en el ámbito de la atención sanitaria basada en la evidencia para formular preguntas y estrategias de búsqueda y para caracterizar estudios o metanálisis clínicos. PICO son las siglas en inglés de cuatro posibles componentes de una pregunta de investigación: paciente, población o problema; intervención; comparación; desenlace (outcome).

Para saber más sobre el uso del modelo PICO, puede consultar el Manual Cochrane.

Flow diagram
Figuras y tablas -
Figure 1

Flow diagram

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies
Figuras y tablas -
Figure 2

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies

Risk of bias summary: review authors' judgements about each risk of bias item for each included study
Figuras y tablas -
Figure 3

Risk of bias summary: review authors' judgements about each risk of bias item for each included study

Comparison 1 Silodosin versus placebo, Outcome 1 Urologic symptom scores (short term).
Figuras y tablas -
Analysis 1.1

Comparison 1 Silodosin versus placebo, Outcome 1 Urologic symptom scores (short term).

Comparison 1 Silodosin versus placebo, Outcome 2 Quality of life (short term).
Figuras y tablas -
Analysis 1.2

Comparison 1 Silodosin versus placebo, Outcome 2 Quality of life (short term).

Comparison 1 Silodosin versus placebo, Outcome 3 Treatment withdrawal due to any reason (short term).
Figuras y tablas -
Analysis 1.3

Comparison 1 Silodosin versus placebo, Outcome 3 Treatment withdrawal due to any reason (short term).

Comparison 1 Silodosin versus placebo, Outcome 4 Treatment withdrawal due to adverse events (short term).
Figuras y tablas -
Analysis 1.4

Comparison 1 Silodosin versus placebo, Outcome 4 Treatment withdrawal due to adverse events (short term).

Comparison 1 Silodosin versus placebo, Outcome 5 Cardiovascular adverse events (short term).
Figuras y tablas -
Analysis 1.5

Comparison 1 Silodosin versus placebo, Outcome 5 Cardiovascular adverse events (short term).

Comparison 1 Silodosin versus placebo, Outcome 6 Sexual adverse events (short term).
Figuras y tablas -
Analysis 1.6

Comparison 1 Silodosin versus placebo, Outcome 6 Sexual adverse events (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 1 Urologic symptom scores (short term).
Figuras y tablas -
Analysis 2.1

Comparison 2 Silodosin versus tamsulosin, Outcome 1 Urologic symptom scores (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 2 Quality of life (short term).
Figuras y tablas -
Analysis 2.2

Comparison 2 Silodosin versus tamsulosin, Outcome 2 Quality of life (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 3 Treatment withdrawal due to any reason (short term).
Figuras y tablas -
Analysis 2.3

Comparison 2 Silodosin versus tamsulosin, Outcome 3 Treatment withdrawal due to any reason (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 4 Treatment withdrawal due to adverse events (short term).
Figuras y tablas -
Analysis 2.4

Comparison 2 Silodosin versus tamsulosin, Outcome 4 Treatment withdrawal due to adverse events (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 5 Cardiovascular adverse events (short term).
Figuras y tablas -
Analysis 2.5

Comparison 2 Silodosin versus tamsulosin, Outcome 5 Cardiovascular adverse events (short term).

Comparison 2 Silodosin versus tamsulosin, Outcome 6 Sexual adverse events (short term).
Figuras y tablas -
Analysis 2.6

Comparison 2 Silodosin versus tamsulosin, Outcome 6 Sexual adverse events (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 1 Urologic symptom scores (short term).
Figuras y tablas -
Analysis 3.1

Comparison 3 Silodosin versus naftopidil, Outcome 1 Urologic symptom scores (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 2 Quality of life (short term).
Figuras y tablas -
Analysis 3.2

Comparison 3 Silodosin versus naftopidil, Outcome 2 Quality of life (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 3 Treatment withdrawal due to any reason (short term).
Figuras y tablas -
Analysis 3.3

Comparison 3 Silodosin versus naftopidil, Outcome 3 Treatment withdrawal due to any reason (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 4 Treatment withdrawal due to adverse events (short term).
Figuras y tablas -
Analysis 3.4

Comparison 3 Silodosin versus naftopidil, Outcome 4 Treatment withdrawal due to adverse events (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 5 Cardiovascular adverse events (short term).
Figuras y tablas -
Analysis 3.5

Comparison 3 Silodosin versus naftopidil, Outcome 5 Cardiovascular adverse events (short term).

Comparison 3 Silodosin versus naftopidil, Outcome 6 Sexual adverse events (short term).
Figuras y tablas -
Analysis 3.6

Comparison 3 Silodosin versus naftopidil, Outcome 6 Sexual adverse events (short term).

Comparison 4 Silodosin versus alfuzosin, Outcome 1 Urologic symptom scores (short term).
Figuras y tablas -
Analysis 4.1

Comparison 4 Silodosin versus alfuzosin, Outcome 1 Urologic symptom scores (short term).

Comparison 4 Silodosin versus alfuzosin, Outcome 2 Quality of life (short term).
Figuras y tablas -
Analysis 4.2

Comparison 4 Silodosin versus alfuzosin, Outcome 2 Quality of life (short term).

Comparison 4 Silodosin versus alfuzosin, Outcome 3 Cardiovascular adverse events (short term).
Figuras y tablas -
Analysis 4.3

Comparison 4 Silodosin versus alfuzosin, Outcome 3 Cardiovascular adverse events (short term).

Comparison 4 Silodosin versus alfuzosin, Outcome 4 Sexual adverse events (short term).
Figuras y tablas -
Analysis 4.4

Comparison 4 Silodosin versus alfuzosin, Outcome 4 Sexual adverse events (short term).

Summary of findings for the main comparison. Silodosin compared to placebo for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Silodosin compared to placebo for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Participants: men with lower urinary tract symptoms suggesting benign prostatic hyperplasia

Setting: likely outpatients

Intervention: silodosin

Comparator: placebo

Outcomes

№ of participants
(studies)

Quality of the evidence
(GRADE)

Relative effect
(95% CI)

Anticipated absolute effects* (95% CI)

Risk with placebo

Risk difference with silodosin

Urologic symptom scores
Assessed with: IPSS
Scale from: 0 (best: not at all) to 35 (worst: almost always)
Follow‐up: mean 3 months

1743
(3 RCTs)

⊕⊕⊝⊝
Lowa,b

The mean change of urologic symptom scores ranged from ‐5.30 to ‐3.50

MD 2.65 lower
(3.23 lower to 2.08 lower)

QoL
Assessed with: IPSS‐QoL
Scale from: 0 (best: delighted) to 6 (worst: terrible)
Follow‐up: mean 3 months

820
(2 RCTs)

⊕⊕⊕⊝
Moderatea,c

The mean change of QoL ranged from ‐1.10 to ‐0.80

MD 0.42 lower
(0.71 lower to 0.13 lower)

Treatment withdrawal due to any reason
Follow‐up: mean 3 months

1703
(3 RCTs)

⊕⊕⊝⊝
Lowa,b

RR 1.08
(0.70 to 1.66)

Study population

83 per 1000

7 more per 1000
(25 fewer to 55 more)

Cardiovascular adverse events
Follow‐up: mean 3 months

1967
(4 RCTs)

⊕⊝⊝⊝
Very lowa,b,d

RR 1.28
(0.67 to 2.45)

Study population

42 per 1000

12 more per 1000
(14 fewer to 61 more)

Assumed baseline riske

61 per 1000

17 more per 1000
(20 fewer to 88 more)

Sexual adverse events
Follow‐up: mean 3 months

1967
(4 RCTs)

⊕⊕⊝⊝
Moderatea

RR 26.07
(12.36 to 54.97)

Study population

7 per 1000

180 more per 1000
(82 more to 388 more)

*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).

CI: confidence interval; IPSS: International Prostate Symptom Score; MD: mean difference; QoL: quality of life; RCTs: randomized controlled trials; RR: risk ratio

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect.
Moderate quality: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different.
Low quality: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect.
Very low quality: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of effect.

aDowngraded by one level for study limitations: unclear or high risk of bias for one or more domains among the included studies.
bDowngraded by one level for imprecision: confidence interval crosses assumed threshold of clinically important difference.
cNot downgraded for inconsistency despite moderate heterogeneity given that likely not clinically meaningful.
dDowngraded by one level for inconsistency: substantial heterogeneity among the included studies.
eEstimates for control event rates for cardiovascular adverse events come from Rosenzweig 1993.

Figuras y tablas -
Summary of findings for the main comparison. Silodosin compared to placebo for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)
Summary of findings 2. Silodosin compared to tamsulosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Silodosin compared to tamsulosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Participants: men with lower urinary tract symptoms suggesting benign prostatic hyperplasia

Setting: likely outpatients

Intervention: silodosin

Comparator: tamsulosin

Outcomes

№ of participants
(studies)

Quality of the evidence
(GRADE)

Relative effect
(95% CI)

Anticipated absolute effects* (95% CI)

Risk with tamsulosin

Risk difference with silodosin

Urologic symptom scores
Assessed with: IPSS
Scale from: 0 (best: not at all) to 35 (worst: almost always)
Follow‐up: range 4 weeks to 12 months

1708
(10 RCTs)

⊕⊕⊝⊝
Lowa,b

The mean change of urologic symptom scores ranged from ‐15.60 to ‐4.60

MD 0.04 lower
(1.31 lower to 1.24 higher)

QoL
Assessed with: IPSS‐QoL
Scale from: 0 (best: delighted) to 6 (worst: terrible)
Follow‐up: range 4 weeks to 12 months

1707
(10 RCTs)

⊕⊕⊝⊝
Lowa,b

The mean change of QoL ranged from ‐3.60 to ‐0.90

MD 0.15 lower
(0.53 lower to 0.22 higher)

Treatment withdrawal due to any reason
Follow‐up: range 4 weeks to 12 months

1573
(10 RCTs)

⊕⊝⊝⊝
Very lowa,b,c

RR 1.02
(0.62 to 1.69)

Study population

121 per 1000

2 fewer per 1000
(46 fewer to 84 more)

Cardiovascular adverse events
Follow‐up: range 4 weeks to 3 months

1955
(11 RCTs)

⊕⊕⊝⊝
Lowa,c

RR 0.77
(0.53 to 1.12)

Study population

63 per 1000

14 fewer per 1000
(29 fewer to 8 more)

Sexual adverse events
Follow‐up: range 4 weeks to 3 months

1849
(10 RCTs)

⊕⊕⊕⊝
Moderatea

RR 6.05
(3.55 to 10.31)

Study population

28 per 1000

141 more per 1000
(71 more to 261 more)

*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).

CI: confidence interval; IPSS: International Prostate Symptom Score; MD: mean difference; QoL: quality of life; RCTs: randomized controlled trials; RR: risk ratio

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect.
Moderate quality: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different.
Low quality: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect.
Very low quality: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of effect.

aDowngraded by one level for study limitations: unclear or high risk of bias for one or more domains among the included studies.
bDowngraded by one level for inconsistency: considerable heterogeneity among the included studies.
cDowngraded by one level for imprecision: confidence interval crosses assumed threshold of clinically important difference.

Figuras y tablas -
Summary of findings 2. Silodosin compared to tamsulosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)
Summary of findings 3. Silodosin compared to naftopidil for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Silodosin compared to naftopidil for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Participants: men with lower urinary tract symptoms suggesting benign prostatic hyperplasia

Setting: likely outpatients

Intervention: silodosin

Comparator: naftopidil

Outcomes

№ of participants
(studies)

Quality of the evidence
(GRADE)

Relative effect
(95% CI)

Anticipated absolute effects* (95% CI)

Risk with naftopidil

Risk difference with silodosin

Urologic symptom scores
Assessed with: IPSS
Scale from: 0 (best: not at all) to 35 (worst: almost always)
Follow‐up: range 6 weeks to 3 months

652
(5 RCTs)

⊕⊕⊝⊝
Lowa,b

The mean change of urologic symptom scores ranged from ‐7.52 to ‐3.56

MD 0.85 lower
(2.57 lower to 0.87 higher)

QoL
Assessed with: IPSS‐QoL
Scale from: 0 (best: delighted) to 6 (worst: terrible)
Follow‐up: range 6 weeks to 3 months

652
(5 RCTs)

⊕⊕⊝⊝
Lowa,b

The mean change of QoL ranged from ‐1.60 to ‐0.95

MD 0.17 lower
(0.6 lower to 0.27 higher)

Treatment withdrawal due to any reason
Follow‐up: range 2 months to 3 months

659
(4 RCTs)

⊕⊕⊝⊝
Lowa,c

RR 1.25
(0.81 to 1.93)

Study population

102 per 1000

25 more per 1000
(19 fewer to 94 more)

Cardiovascular adverse events
Follow‐up: range 6 weeks to 3 months

808
(5 RCTs)

⊕⊕⊝⊝
Lowa,c

RR 1.02
(0.41 to 2.56)

Study population

23 per 1000

0 more per 1000
(13 fewer to 35 more)

Sexual adverse events
Follow‐up: range 6 weeks to 3 months

405
(4 RCTs)

⊕⊕⊕⊝
Moderatea

RR 5.93
(2.16 to 16.29)

Study population

15 per 1000

74 more per 1000
(17 more to 231 more)

*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).

CI: confidence interval; IPSS: International Prostate Symptom Score; MD: mean difference; QoL: quality of life; RCTs: randomized controlled trials; RR: risk ratio

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect.
Moderate quality: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different.
Low quality: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect.
Very low quality: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of effect.

aDowngraded by one level for study limitations: unclear or high risk of bias for one or more domains among the included studies.
bDowngraded by one level for inconsistency: considerable heterogeneity among the included studies.
cDowngraded by one level for imprecision: confidence interval crosses assumed threshold of clinically important difference.

Figuras y tablas -
Summary of findings 3. Silodosin compared to naftopidil for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)
Summary of findings 4. Silodosin compared to alfuzosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Silodosin compared to alfuzosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)

Participants: men with lower urinary tract symptoms suggesting benign prostatic hyperplasia

Setting: likely outpatients

Intervention: silodosin

Comparator: alfuzosin

Outcomes

№ of participants
(studies)

Quality of the evidence
(GRADE)

Relative effect
(95% CI)

Anticipated absolute effects* (95% CI)

Risk with alfuzosin

Risk difference with silodosin

Urologic symptom scores
Assessed with: IPSS
Scale from: 0 (best: not at all) to 35 (worst: almost always)
Follow‐up: mean 3 months

60
(1 RCT)

⊕⊕⊝⊝
Lowa,b

The mean change of urologic symptom scores was ‐16.93

MD 3.83 higher
(0.12 higher to 7.54 higher)

QoL
Assessed with: IPSS‐QoL
Scale from: 0 (best: delighted) to 6 (worst: terrible)
Follow‐up: mean 3 months

60
(1 RCT)

⊕⊕⊕⊝
Moderatea

The mean change of QoL was ‐4.27

MD 0.14 higher
(0.46 lower to 0.74 higher)

Treatment withdrawal due to any reason
Follow‐up: mean 3 months

60
(1 RCT)

⊕⊕⊝⊝
Lowa,c

Not estimable

Study population

Cardiovascular adverse events
Follow‐up: mean 3 months

60
(1 RCT)

⊕⊕⊝⊝
Lowa,b

RR 0.67
(0.36 to 1.24)

Study population

500 per 1000

165 fewer per 1000
(320 fewer to 120 more)

Assumed baseline riskd

44 per 1000

15 fewer per 1000
(11 fewer to 28 more)

Sexual adverse events
Follow‐up: mean 3 months

95
(1 RCT)

⊕⊕⊝⊝
Moderatea

RR 37.21
(5.32 to 260.07)

Study population

21 per 1000

770 more per 1000
(92 more to 5,512 more)

Assumed baseline riskd

6 per 1000

217 more per 1000
(26 more to 1000 more)

*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).

CI: confidence interval; IPSS: International Prostate Symptom Score; MD: mean difference; QoL: quality of life; RCTs: randomized controlled trials; RR: risk ratio

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect.
Moderate quality: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different.
Low quality: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect.
Very low quality: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of effect.

aDowngraded by one level for study limitations: unclear or high risk of bias for one or more domains in the included study.
bDowngraded by one level for imprecision: confidence interval crosses assumed threshold of clinically important difference.
cDowngraded by one level for imprecision: no event (very rare event).
dEstimates for control event rates for cardiovascular and sexual adverse events come from Van Kerrebroec 2002.

Figuras y tablas -
Summary of findings 4. Silodosin compared to alfuzosin for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia (short term)
Table 1. Baseline characteristics of included studies

Study name

Trial
period
(year to
year)

Country

Setting

Description of participants

Intervention(s)
and
comparator(s)

Duration of
intervention
(duration of
follow‐up)

Age

Prostate volume

IPSS

Chapple 2011

2006‐2007

Europe

72 hospital clinics and inpatient units in 11 countries

Men ≥ 50 years with LUTS (defined by a stable IPSS total score ≥ 13 points), bladder outlet obstruction (defined by a Qmax between 4 and 15 mL/s, with a minimum voided volume of ≥ 125 mL)

Silodosin 8 mg once daily

12 weeks

65.8 ± 7.70

NR

19.1 ± 4.2

Tamsulosin 0.4 mg once daily

65.9 ± 7.41

18.9 ± 4.3

Placebo once daily

66.0 ± 7.37

19.3 ± 4.3

Jung 2012

NR

South Korea

NR

Sexually active men with BPH

Silodosin 8 mg once daily

4 weeks

NR

NR

NR

Tamsulosin 0.2 mg once daily

Alfuzosin 10 mg once daily

Kawabe 2006a

NR

Japan

88 centers/outpatient

Men ≥ 50 years with LUTS (IPSS of ≥ 8, an associated QoL score of ≥ 3) and prostate volume of ≥ 20 mL

Silodosin 4 mg twice daily

12 weeks

65.4 ± 7.0

36.0 ± 16.9

17.1 ± 5.7

Tamsulosin 0.2 mg once daily

65.6 ± 7.0

35.7 ± 14.4

17.0 ± 5.7

Placebo twice daily

65.0 ± 6.9

35.2 ± 16.0

17.1 ± 6.1

Manjunatha 2016a

2013‐2014

India

Tertiary care hospital

Men ≥ 45 years with symptomatic BPH with LUTS (IPSS of ≥ 8, QoL of ≥ 3, and Qmax of < 15 mL/s, but > 4 mL/s with a voided volume of > 100 mL)

Silodosin 8 mg once daily

12 weeks

64.00 ± 11.14

40.57 ± 16.45

15.93 ± 6.03

Tamsulosin 0.4 mg once daily

63.60 ± 9.05

40.33 ± 21.55

21.63 ± 7.63

Alfuzosin 10 mg once daily

63.43 ± 8.91

44.43 ± 27.72

19.2 ± 9.6

Marks 2009

2005‐2006

USA

Multicenter

Men ≥ 50 years with IPSS ≥ 13, Qmax 4 mL/s‐15 mL/s and a PVR < 250 mL

Silodosin 8 mg once daily

12 weeks

64.6 ± 8.1

NR

21.3 ± 5.1

Placebo once daily

64.7 ± 8.1

21.3 ± 4.9

Masuda 2012

2009‐2011

Japan

NR

Men ≥ 50 years with prostate estimated volume of > 20 mL, IPSS ≥ 8, QoL score ≥ 3 points

Silodosin 2 mg‐4 mg twice/d for 2 weeks, followed by 4 mg twice/d for 4 weeks

6 weeks (before cross‐over)/total 12 weeks

66.5 ± 5.6

38.8 ± 13.1

18.6 ± 5.5

Naftopidil 50 mg‐75 mg once/d for 2 weeks, followed by 75 mg once/d for 4 weeks

68.5 ± 5.7

45.7 ± 17.8

17.6 ± 5.0

Matsukawa 2016

2012‐2013

Japan

52 urologists participated at a total of 44 investigational sites/outpatients

Men with LUTS (IPSS ≥ 8, IPSS QoL score 3) and prostate volume ≥ 20 mL

Silodosin 4 mg/d for 4 weeks, followed by 8 mg/d for 8 weeks

12 weeks

70.6 ± 7.8

39.6 ± 16.7

18.8 ± 6.2

Naftopidil 50 mg/d for 4 weeks, followed by 75 mg/d for 8 weeks

70.3 ± 7.8

38.6 ± 14.8

18.9 ± 6.1

Miyakita 2010

2006‐2007

Japan

Multicenter

Men with IPSS ≥ 8 points; QoL score ≥ 3 points; prostate volume measured by ultrasonographic method ≥ 20 mL; void volume ≥ 100 mL; and maximal urinary flow rate (Qmax) < 15 mL/s

Silodosin 4 mg twice daily

4 weeks (before cross‐over)/total 8 weeks

68.2 ± 8.6

41.3 ± 25.3

16.6 ± 5.2

Tamsulosin 0.2 mg once daily

70.1 ± 8.9

37.8 ± 16.3

18.2 ± 5.8

Natarajan 2015

2013‐2015

India

Tertiary hospital

Men > 50 years with bothersome LUTS from BPH and IPSS > 7

Silodosin 8 mg once daily

12 weeks

61 ‐ 62

NR

NR

Tamsulosin 0.4 mg once daily

NCT00793819

2009

NR

NR

Men ≥ 50 years, with symptoms of moderate‐severe BPH and nocturia (≥ 2 episodes/night)

Silodosin 8 mg daily

12 weeks

64.6 ± 8.03

NR

NR

Placebo once daily

64.2 ± 8.92

Pande 2014

2012‐2013

India

Tertiary care hospital/ outpatient

Men > 50 years with bothersome LUTS from BPH and IPSS > 7

Silodosin 8 mg once daily

12 weeks

61.4 ± 7.88

42.0 ± 19.96

18.4 ± 3.32

Tamsulosin 0.4 mg once daily

62.6 ± 7.55

35.6 ± 9.56

18.4 ± 3.94

Shirakawa 2013

2007‐2011

Japan

Kobe University School or other collaborating institutions

Men with LUTS (total IPSS ≥ 8, QoL index ≥ 3) and prostate volume ≥ 20 mL

Silodosin 4 mg twice daily

8 weeks

70.98 ± 6.69

38.24 ± 12.94

17.53 ± 5.4

Naftopidil 50 mg once daily

70.50 ± 6.58

39.39 ± 25.96

17.56 ± 6.7

Takeshita 2016

2011‐2014

Japan

Four community‐based hospitals

Men aged ≥ 50 years with LUTS/BPH, an IPSS of ≥ 8, QoL score of ≥ 3, and ultrasound‐estimated prostatic volume of ≥ 20 mL

Silodosin 4 mg once daily

4 weeks (before cross‐over)/total 8 weeks

69.6 ± 5.4

38.7 ± 11.6

17.1 ± 7.3

Tamsulosin 0.2 mg once daily

69.4 ± 7.0

47.3 ± 30.4

15.2 ± 7.0

Watanabe 2011

2008‐2009

Japan

Three institutions

Men with LUTS associated with BPH and had an IPSS ≥ 8 and an IPSS‐QoL score ≥ 2

Silodosin 4 mg twice daily

4 weeks (before cross‐over)/total 8 weeks

69.3 ± 8.3

36.6 ± 18.3

16.4 ± 5.0

Tamsulosin 0.2 mg once daily

69.9 ± 8.4

35.1 ± 13.0

18.1 ± 6.2

Yamaguchi 2013

2007‐2010

Japan

Nihon University School of Medicine

Men with BPH, ≥ 50 years with significant LUTS (IPSS ≥ 8, QoL score ≥ 3)

Silodosin 8 mg/ day

12 weeks

69.3 ± 7.8

33.2 ± 21.2

16.9 ± 5.5

Naftopidil 75 mg/ day

70.0 ± 7.0

39.5 ± 18.0

18.9 ± 7.0

Yamanishi 2011

NR

NR

NR

Men with LUTS (IPSS total score ≥ 8, Qmax < 15 mL/s) and prostate volume > 20 mL

Silodosin 4 mg twice daily

12 months

71.3 ± 8.2

42.0 ± 23.7

18.8 ± 7.3

Tamsulosin 0.2 ‐ 0.4 mg daily

72.2 ± 7.6

41.2 ± 23.0

17.8 ± 6.4

Yokoyama 2011

NR

Japan

Kawasaki Medical School

Men aged 50–‐80 years and with IPSS ≥ 8

Silodosin 4 mg twice daily

12 weeks

70.2 ± 0.9

33.3 ± 2.3

18.7 ± 0.7

Tamsulosin 0.2 mg once daily

71.5 ± 1.1

32.5 ± 2.0

18.0 ± 1.1

Naftopidil 50 mg once daily

69.1 ± 1.2

35.0 ± 3.1

17.4 ± 0.8

Yokoyama 2012

2008‐2010

Japan

Single center

Men aged 50 years who had a total IPSS ≥ 8 and a QoL index ≥ 3

Silodosin 4 mg twice daily

3 months (before cross‐over)/1 month wash‐out/3 months (after cross‐over)/total 7 months

68.9 ± 5.6

35.0 ± 18.4

19.3 ± 4.9

Tamsulosin 0.2 mg once daily

70.0 ± 6.8

36.1 ± 15.5

21.1 ± 6.8

Yu 2011

2007‐2008

Taiwan

Nine medical centers

Men aged ≥ 40 years with an IPSS of ≥ 13 and prostate volume of ≥ 20 mL

Silodosin 4 mg twice daily

12 weeks

67.5 ± 9.3

44.8 ± 24.2

19.3 ± 4.5

Tamsulosin 0.2 mg and one placebo

65.0 ± 8.8

38.2 ± 16.7

19.8 ± 4.5

BPH: benign prostatic hyperplasia; IPSS: International Prostate Symptom Score; LUTS: lower urinary tract symptoms; NR: not reported; PVR: postvoid residual; Qmax: maximum flow rate; QoL: quality of life

Figuras y tablas -
Table 1. Baseline characteristics of included studies
Table 2. Participants in included studies

Study name

Intervention(s) and comparator(s)

Screened/eligible (N)

randomized (N)

Analysed (N)

Finishing trial (N (%))

Chapple 2011

Silodosin 8 mg

1228/955

381

346

356 (93.4)

Tamsulosin 0.4 mg

384

347

364 (94.7)

Placebo

190

168

172 (90.5)

Total

955

861

892 (93.4)

Jung 2012

Silodosin 8 mg

NR/138

48

48

48 (100.0)

Tamsulosin 0.2 mg

43

43

43 (100.0)

Alfuzosin 10 mg

47

47

47 (100.0)

Total

138

138

138 (100.0)

Kawabe 2006a

Silodosin 8 mg

NR/457

176

175

175 (99.4)

Tamsulosin 0.2 mg

192

192

192 (100.0)

Placebo

89

89

89 (100.0)

Total

457

456

456 (99.7)

Manjunatha 2016a

Silodosin 8 mg

NR/90

30

30

30 (100.0)

Tamsulosin 0.4 mg

30

30

30 (100.0)

Alfuzosin 10 mg

30

30

30 (100.0)

Total

90

90

90 (100.0)

Marks 2009

Silodosin 8 mg

2849/923

466

466

413 (88.6)

Placebo

457

457

419 (91.6)

Total

923

923

832 (90.1)

Masuda 2012

Silodosin 4 mg or 8 mg

NR/92

44

30/83a

30 (68.1)

Naftopidil 50 mg or 75 mg

48

34/79a

34 (70.8)

Total

92

64/162a

64 (69.5)

Matsukawa 2016

Silodosin 4 mg followed by 8 mg

NR/350

175

157

157 (89.7)

Naftopidil 50 mg followed by 75 mg

175

157

157 (89.7)

Total

350

314

314 (89.7)

Miyakita 2010

Silodosin 8 mg

NR/97

46

34

34 (73.9)

Tamsulosin 0.2 mg

51

31

31 (60.7)

Total

97

65

65 (67.0)

Natarajan 2015

Silodosin 8 mg

NR/57

28

NR

NR

Tamsulosin 0.4 mg

29

NR

NR

Total

57

NR

NR

NCT00793819

Silodosin 8 mg

215/209

111

111

97 (87.3)

Placebo

98

98

89 (90.8)

Total

209

209

186 (88.9)

Pande 2014

Silodosin 8 mg

102/61

32

26

26 (81.2)

Tamsulosin 0.4 mg

29

27

27 (93.1)

Total

61

53

53 (86.8)

Shirakawa 2013

Silodosin 8 mg

NR/121

61

56/59a

56 (91.8)

Naftopidil 50 mg

60

56/57a

56 (93.3)

Total

121

112/116a

112 (92.5)

Takeshita 2016

Silodosin 4 mg

NR/34

18

16

16 (88.8)

Tamsulosin 0.2 mg

16

14

14 (87.5)

Total

34

30

30 (88.2)

Watanabe 2011

Silodosin 4 mg

NR/102

51

42/88a

42 (82.3)

Tamsulosin 0.2 mg

51

42/91a

42 (82.3)

Total

102

84/179a

42 (82.3)

Yamaguchi 2013

Silodosin 8 mg

109/109

58

53

53 (91.3)

Naftopidil 75 mg

51

44

44 (86.2)

Total

109

97

97 (88.9)

Yamanishi 2011

Silodosin 8 mg

NR/149

75

NR

NR

Tamsulosin 0.2 ‐ 0.4 mg

74

NR

NR

Total

149

NR

NR

Yokoyama 2011

Silodosin 8 mg

136/136

45

41

41 (91.1)

Tamsulosin 0.2 mg

45

39

39 (86.6)

Naftopidil 50 mg

46

42

42 (91.3)

Total

136

122

122 (89.7)

Yokoyama 2012

Silodosin 8 mg

NR/46

23

23

23 (100.0)

Tamsulosin 0.2 mg

23

23

23 (100.0)

Total

46

46

46 (100.0)

Yu 2011

Silodosin 8 mg

NR/209

105

87

87 (82.8)

Tamsulosin 0.2 mg

104

83

83 (79.8)

Total

209

170

170 (81.3)

Grand total

Interventions: silodosin

1955

1684b

Compartors: placebo

834

769 (92.2)

Compartors: tamsulosin

1049

888b

Compartors: naftopidil

380

333 (87.6)

Comparator: alfuzosin

77

77 (100.0)

Overall

4295

3751b

N: number; NR: not reported

a Efficacy analysis/safety analysis.
b The number of participants who finished trials were not reported in two included studies (Natarajan 2015; Yamanishi 2011).

Figuras y tablas -
Table 2. Participants in included studies
Comparison 1. Silodosin versus placebo

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Urologic symptom scores (short term) Show forest plot

3

1743

Mean Difference (IV, Random, 95% CI)

‐2.65 [‐3.23, ‐2.08]

2 Quality of life (short term) Show forest plot

2

820

Mean Difference (IV, Random, 95% CI)

‐0.42 [‐0.71, ‐0.13]

3 Treatment withdrawal due to any reason (short term) Show forest plot

3

1703

Risk Ratio (M‐H, Random, 95% CI)

1.08 [0.70, 1.66]

4 Treatment withdrawal due to adverse events (short term) Show forest plot

4

1967

Risk Ratio (M‐H, Random, 95% CI)

2.29 [1.41, 3.72]

5 Cardiovascular adverse events (short term) Show forest plot

4

1967

Risk Ratio (M‐H, Random, 95% CI)

1.28 [0.67, 2.45]

6 Sexual adverse events (short term) Show forest plot

4

1967

Risk Ratio (M‐H, Random, 95% CI)

26.07 [12.36, 54.97]

Figuras y tablas -
Comparison 1. Silodosin versus placebo
Comparison 2. Silodosin versus tamsulosin

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Urologic symptom scores (short term) Show forest plot

10

1708

Mean Difference (IV, Random, 95% CI)

‐0.04 [‐1.31, 1.24]

2 Quality of life (short term) Show forest plot

10

1707

Mean Difference (IV, Random, 95% CI)

‐0.15 [‐0.53, 0.22]

3 Treatment withdrawal due to any reason (short term) Show forest plot

10

1573

Risk Ratio (M‐H, Random, 95% CI)

1.02 [0.62, 1.69]

4 Treatment withdrawal due to adverse events (short term) Show forest plot

9

1572

Risk Ratio (M‐H, Random, 95% CI)

1.96 [1.12, 3.44]

5 Cardiovascular adverse events (short term) Show forest plot

11

1955

Risk Ratio (M‐H, Random, 95% CI)

0.77 [0.53, 1.12]

6 Sexual adverse events (short term) Show forest plot

10

1849

Risk Ratio (M‐H, Random, 95% CI)

6.05 [3.55, 10.31]

Figuras y tablas -
Comparison 2. Silodosin versus tamsulosin
Comparison 3. Silodosin versus naftopidil

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Urologic symptom scores (short term) Show forest plot

5

652

Mean Difference (IV, Random, 95% CI)

‐0.85 [‐2.57, 0.87]

2 Quality of life (short term) Show forest plot

5

652

Mean Difference (IV, Random, 95% CI)

‐0.17 [‐0.60, 0.27]

3 Treatment withdrawal due to any reason (short term) Show forest plot

4

659

Risk Ratio (M‐H, Random, 95% CI)

1.25 [0.81, 1.93]

4 Treatment withdrawal due to adverse events (short term) Show forest plot

5

738

Risk Ratio (M‐H, Random, 95% CI)

1.38 [0.66, 2.89]

5 Cardiovascular adverse events (short term) Show forest plot

5

808

Risk Ratio (M‐H, Random, 95% CI)

1.02 [0.41, 2.56]

6 Sexual adverse events (short term) Show forest plot

4

405

Risk Ratio (M‐H, Random, 95% CI)

5.93 [2.16, 16.29]

Figuras y tablas -
Comparison 3. Silodosin versus naftopidil
Comparison 4. Silodosin versus alfuzosin

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Urologic symptom scores (short term) Show forest plot

1

60

Mean Difference (IV, Random, 95% CI)

3.83 [0.12, 7.54]

2 Quality of life (short term) Show forest plot

1

60

Mean Difference (IV, Random, 95% CI)

0.14 [‐0.46, 0.74]

3 Cardiovascular adverse events (short term) Show forest plot

1

60

Risk Ratio (M‐H, Random, 95% CI)

0.67 [0.36, 1.24]

4 Sexual adverse events (short term) Show forest plot

1

95

Risk Ratio (M‐H, Random, 95% CI)

37.21 [5.32, 260.07]

Figuras y tablas -
Comparison 4. Silodosin versus alfuzosin