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Inhibidores de la recaptación de serotonina y noradrenalina (IRSN) para la fibromialgia

Appendices

Appendix 1. Search strategies and hits retrieved

Randomized controlled trials (RCTs) with serotonin and noradrenaline reuptake inhibitors (SNRIs) in fibromyalgia (updated search 8 August 2017)

Database (access) and date of search

Search strategy and hits retrieved

CENTRAL

(the Cochrane Library)

2017, Issue 7

#1 MeSH descriptor Fibromyalgia explode all trees 823

#2 (fibromyalgi$):ti,ab,kw or (fibrositis):ti,ab,kw 62

#3 (#1 OR #2), from 2010 to 2012 38

#4 (cymbalta):ti,ab,kw or (savella):ti,ab,kw or (ixel):ti,ab,kw or (pristiq):ti,ab,kw or (effexor):ti,ab,kw 31

#5 (desvenlaxafine):ti,ab,kw or (duloxetine):ti,ab,kw or (milnacipran):ti,ab,kw or (venlaxafine):ti,ab,kw1011

#6 (#4 OR #5), from 2010 to 2017 106

#7(#3 AND #6) 2

MEDLINE

(PubMed)

8 August 2017

#1 Search Fibromyalgia"[Mesh] OR fibromyalgi*[ti] OR fibrositis[ti] 6497

#2 Search (randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR drug therapy[sh] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) NOT (animals[mh] NOT (humans[mh] AND animals[mh])) 3521493

#3 Search cymbalta OR savella OR ixel OR pristiq OR effexor OR desvenlafaxine OR duloxetine OR venlafaxine 6258

# 4 Search ((#1) AND #2) AND #3 Filters: Publication date from 2015/08/01 to 2017/08/07 7

Embase via SCOPUS

8 August 2017

( ( ( TITLE‐ABS‐KEY ( cymbalta ) OR TITLE‐ABS‐KEY ( savella ) OR TITLE‐ABS‐KEY ( ixel ) OR TITLE‐ABS‐KEY ( pristiq ) OR TITLE‐ABS‐KEY ( effexor ) OR TITLE‐ABS‐KEY ( desvenlaxafine ) OR TITLE‐ABS‐KEY ( duloxetine ) OR TITLE‐ABS‐KEY ( venlaxafine ) AND ( ( ( TITLE‐ABS‐KEY ( fibromyalgia ) OR TITLE‐ABS‐KEY ( fibrositis ) OR TITLE‐ABS‐KEY ( fms ) ) ) AND ( ( TITLE‐ABS‐KEY ( randomizedcontrolledtrial ) OR TITLE‐ABS‐KEY ( controlledtrial ) OR TITLE‐ABS‐KEY ( placebo ) OR TITLE‐ABS‐KEY ( singleblind ) OR TITLE‐ABS‐KEY ( doubleblind ) ) ) ) ) AND ( PUBYEAR > 2015 ) 18

US National Institutes of Health

31 November 2015 to 8 August 2017

1 fibromyalgia and desvenlafaxine 0

2 fibromyalgia and duloxetine 3

3 fibromyalgia and milnacipran 0

4 fibromyalgia and venlafaxine 1

5 SNRI and fibromyalgia 21

World Health Organization

Inception to 8 August 2017

1 fibromyalgia and desvenlafaxine 3

2 fibromyalgia and duloxetine 10

3 fibromyalgia and milnacipran 10

4 fibromyalgia and venlafaxine 1

5 SNRI and fibromyalgia 0

RCTs with SNRIs in fibromyalgia (search 30 November 2015)

Database (access) and date of search

Search strategy and hits retrieved

CENTRAL

(the Cochrane Library)

2015, Issue 11

#1 fibromyalgi$ or fibrositis:ti,ab,kw (Word variations have been searched) 61

#2 MeSH descriptor: [Fibromyalgia] explode all 675

#3 #1 or #2 723

#4 cymbalta or savella or ixel or pristiq or effexor or desvenlaxafine or duloxetine or venlaxafine:ti,ab,kw (Word variations have been searched) 816

#5 #3 AND #4 in Trials 31

#6 #5 Publication Year from 2012 to 2015 7

MEDLINE

(PubMed)

30 November 2015

#1 Search Fibromyalgia"[Mesh] OR fibromyalgi*[ti] OR fibrositis[ti] 5713

#2 Search (randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR drug therapy[sh] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) NOT (animals[mh] NOT (humans[mh] AND animals[mh])) 3125777

#3 Search cymbalta OR savella OR ixel OR pristiq OR effexor OR desvenlafaxine OR duloxetine OR venlafaxine 5544

# 4 Search ((#1) AND #2) AND #3 Filters: Publication date from 2012/09/01 to 2015/11/30 42

Embase via SCOPUS

30 November 2015

( ( ( TITLE‐ABS‐KEY ( cymbalta ) OR TITLE‐ABS‐KEY ( savella ) OR TITLE‐ABS‐KEY ( ixel ) OR TITLE‐ABS‐KEY ( pristiq ) OR TITLE‐ABS‐KEY ( effexor ) OR TITLE‐ABS‐KEY ( desvenlaxafine ) OR TITLE‐ABS‐KEY ( duloxetine ) OR TITLE‐ABS‐KEY ( venlaxafine ) AND ( ( ( TITLE‐ABS‐KEY ( fibromyalgia ) OR TITLE‐ABS‐KEY ( fibrositis ) OR TITLE‐ABS‐KEY ( fms ) ) ) AND ( ( TITLE‐ABS‐KEY ( randomizedcontrolledtrial ) OR TITLE‐ABS‐KEY ( controlledtrial ) OR TITLE‐ABS‐KEY ( placebo ) OR TITLE‐ABS‐KEY ( singleblind ) OR TITLE‐ABS‐KEY ( doubleblind ) ) ) ) ) AND ( PUBYEAR > 2011 ) 104

US National Institutes of Health

30 November 2015

1 fibromyalgia and desvenlafaxine 1

2 fibromyalgia and duloxetine 1

3 fibromyalgia and milnacipran 2

3 fibromyalgia and venlafaxine 1

4 SNRI and fibromyalgia 10

RCTs with SNRIs in fibromyalgia (updated search 11 September 2012)

Database (access) and date of search

Search strategy and hits retrieved

CENTRAL

(the Cochrane Library)

2012, Issue 9

#1MeSH descriptor Fibromyalgia explode all trees 510

#2 (fibromyalgi$):ti,ab,kw or (fibrositis):ti,ab,kw 62

#3 (#1 OR #2), from 2010 to 2012 107

#4 (cymbalta):ti,ab,kw or (savella):ti,ab,kw or (ixel):ti,ab,kw or (pristiq):ti,ab,kw or (effexor):ti,ab,kw 17

#5 (desvenlaxafine):ti,ab,kw or (duloxetine):ti,ab,kw or (milnacipran):ti,ab,kw or (venlaxafine):ti,ab,kw 454

#6 (#4 OR #5), from 2010 to 2012 77

#7 (#3 AND #6) 17

MEDLINE

(PubMed)

11 September 2012

#1"Fibromyalgia"[MeSH] OR fibromyalgi*[ti] OR fibrositis[ti] 6070

#2 (randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR drug therapy[sh] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) NOT (animals[mh] NOT (humans[mh] AND animals[mh])) 2600091

#3 Search cymbalta OR savella OR ixel OR pristiq OR effexor OR desvenlafaxine OR duloxetine OR milnacipran OR venlafaxine 4353

#4 Search ((#1) AND #2) AND #3 Filters: Publication date from 2010/10/01 to 2012/09/10  42

Embase via SCOPUS

11 September 2012

1 (TITLE‐ABS‐KEY(random) OR TITLE‐ABS‐KEY(placebo) OR TITLE‐ABS‐KEY(double‐blind)) AND DOCTYPE(ar) AND PUBYEAR > 2009 97115

2 (TITLE‐ABS‐KEY(expfibromyalgia/) OR TITLE‐ABS‐KEY(fibrositis) OR TITLE‐ABS‐KEY(fibromyalgia)) AND DOCTYPE(ar) AND PUBYEAR > 2009 1265

3 (TITLE‐ABS‐KEY(cymbalta) OR TITLE‐ABS‐KEY(savella) OR TITLE‐ABS‐KEY(ixel) OR TITLE‐ABS‐KEY(pristiq) OR TITLE‐ABS‐KEY(effexor) OR TITLE‐ABS‐KEY(desvenlaxafine) OR TITLE‐ABS‐KEY(duloxetine) OR TITLE‐ABS‐KEY(venlaxafine) OR TITLE‐ABS‐KEY(milnacipran)) AND DOCTYPE(ar) AND PUBYEAR > 2009 1051

4 ((TITLE‐ABS‐KEY(expfibromyalgia/) OR TITLE‐ABS‐KEY(fibrositis) OR TITLE‐ABS‐KEY(fibromyalgia)) AND DOCTYPE(ar) AND PUBYEAR > 2009) AND ((TITLE‐ABS‐KEY(random) OR TITLE‐ABS‐KEY(placebo) OR TITLE‐ABS‐KEY(double‐blind)) AND DOCTYPE(ar) AND PUBYEAR > 2009) AND ((TITLE‐ABS‐KEY(cymbalta) OR TITLE‐ABS‐KEY(savella) OR TITLE‐ABS‐KEY(ixel) OR TITLE‐ABS‐KEY(pristiq) OR TITLE‐ABS‐KEY(effexor) OR TITLE‐ABS‐KEY(desvenlaxafine) OR TITLE‐ABS‐KEY(duloxetine) OR TITLE‐ABS‐KEY(venlaxafine) OR TITLE‐ABS‐KEY(milnacipran)) AND DOCTYPE(ar) AND PUBYEAR > 2009) 50

US National Institutes of Health

11 September 2012

1 fibromyalgia 401

2 fibromyalgia and desvenlafaxine 4

3 fibromyalgia and duloxetine 25

4 fibromyalgia and milnacipran 27

5 fibromyalgia and venlafaxine 0

RCTs with SNRIs in fibromyalgia (updated search November 2010)

Database (access) and date of search

Search strategy and hits retrieved

CENTRAL

(the Cochrane Library)

2010, Issue 10

#1MeSH descriptor Fibromyalgia explode all trees 449

#2 fibromyalgi* 755

#3 fibrositis 50

#4 #1 OR #2 OR #3 774

#5 (#1 OR #2 OR #3), from 2009 to 2010 137 (69 in clinical trials)

MEDLINE

(PubMed)

4 November 2010

#1"Fibromyalgia"[MeSH] OR fibromyalgi*[ti] OR fibrositis[ti] 5248

#2 (randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR drug therapy[sh] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) NOT (animals[mh] NOT (humans[mh] AND animals[mh])) 2309479

#3 #1 AND #2  1682

#4 (#2) AND #1 Limits: Publication Date from 2009   312

Embase

(Ovid)

4 November 2010

1 exp Fibromyalgia/ 8833

2 fibromyalgia.ti,ab. 6702

3 exp Fibromyalgia/ 8833

4 fibrositis.ti. 271

5 1 or 2 or 3 or 4 9482

6 random:.tw. or placebo:.mp. or double‐blind:.mp. 776985

7 5 and 6 1417

8 limit 7 to yr="2009 ‐Current" 405

ClinicalStudyResults.org

31 December 2010

1 fibromyalgia 19

2 fibromyalgia and cymbalta4

3 fibromyalgia and savella or ixel: no search possible

4 fibromyalgia and pristiq 4

5 fibromyalgia and effexor 0

US National Institutes of Health

31 December 2010

1 fibromyalgia 326

2 fibromyalgia and desvenlafaxine 4

3 fibromyalgia and duloxetine 20

4 fibromyalgia and milnacipran 20

5 fibromyalgia and venlafaxine 0

 

RCTs with SNRIs in fibromyalgia (initial search February 2009)

Database (access) and date of search

Search strategy and hits retrieved

CENTRAL

(the Cochrane Library)

2009, Issue 1

#1MeSH descriptor Fibromyalgia explode all trees 315

#2 fibromyalgi* 512

#3 fibrositis 36

#4 #1 OR #2 OR #3 526

MEDLINE

(PubMed)

9 February 2009

#1"Fibromyalgia"[MeSH] OR fibromyalgi*[ti] OR fibrositis[ti] 4433

#2 (randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR drug therapy[sh] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) AND humans [mh] 1912816

#3 #1 AND #2  1316

Embase

(Ovid)

9 February 2009

1 exp Fibromyalgia/ 5537

2 fibromyalgia.ti,ab. 4304

3 exp Fibromyalgia/ 354

4 fibrositis.ti. 122

5 1 or 2 or 3 or 4 6046

6 random:.tw. or placebo:.mp. or double‐blind:.mp. 514373

7 5 and 6 886

 

Study flow diagram

Figuras y tablas -
Figure 1

Study 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: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 1: Self‐reported pain relief of 50% or greater

Figuras y tablas -
Analysis 1.1

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 1: Self‐reported pain relief of 50% or greater

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 2: PGIC much or very much improved

Figuras y tablas -
Analysis 1.2

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 2: PGIC much or very much improved

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 3: Withdrawal due to adverse events

Figuras y tablas -
Analysis 1.3

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 3: Withdrawal due to adverse events

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 4: Serious adverse events

Figuras y tablas -
Analysis 1.4

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 4: Serious adverse events

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 5: Self‐reported fatigue

Figuras y tablas -
Analysis 1.5

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 5: Self‐reported fatigue

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 6: Self‐reported sleep problems

Figuras y tablas -
Analysis 1.6

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 6: Self‐reported sleep problems

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 7: Self‐reported health‐related quality of life

Figuras y tablas -
Analysis 1.7

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 7: Self‐reported health‐related quality of life

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 8: Self‐reported pain relief of 30% or greater

Figuras y tablas -
Analysis 1.8

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 8: Self‐reported pain relief of 30% or greater

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 9: Self‐reported mean pain intensity

Figuras y tablas -
Analysis 1.9

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 9: Self‐reported mean pain intensity

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 10: Self‐reported depression

Figuras y tablas -
Analysis 1.10

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 10: Self‐reported depression

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 11: Self‐reported anxiety

Figuras y tablas -
Analysis 1.11

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 11: Self‐reported anxiety

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 12: Self‐reported disability

Figuras y tablas -
Analysis 1.12

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 12: Self‐reported disability

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 13: Self‐reported cognitive disturbances

Figuras y tablas -
Analysis 1.13

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 13: Self‐reported cognitive disturbances

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 14: Tenderness

Figuras y tablas -
Analysis 1.14

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 14: Tenderness

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 15: Withdrawal due to lack of efficacy

Figuras y tablas -
Analysis 1.15

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 15: Withdrawal due to lack of efficacy

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 16: Nausea

Figuras y tablas -
Analysis 1.16

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 16: Nausea

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 17: Somnolence

Figuras y tablas -
Analysis 1.17

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 17: Somnolence

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 18: Insomnia

Figuras y tablas -
Analysis 1.18

Comparison 1: SNRIs versus placebo in parallel and cross‐over design trials, Outcome 18: Insomnia

Summary of findings 1. Serotonin noradrenaline reuptake inhibitors compared with placebo for fibromyalgia ‐ studies with parallel design

Serotonin noradrenaline reuptake inhibitors compared with placebo for fibromyalgia ‐ studies with parallel design

Patient or population: people with fibromyalgia

Settings: study centers in North, Central and South America, Asia and Europe

Intervention: serotonin noradrenaline reuptake inhibitors (duloxetine, milnacipran)

Comparison: placebo

Outcomes

Probable outcome with intervention

(95% CI)

Probable outcome with placebo

Relative effect

SMD or risk difference
(95% CI)

No of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Self‐reported pain relief of 50% or greater

309 per 1000

(282 to 344)

210 per 1000

RD 0.09 (0.07 to 0.11)

6918 (15 studies)

⊕⊕⊝⊝
low1,2

NNTB 11 (95% CI 9 to 14)

Patient Global Impression to be much or very much improved (PGIC)

519 per 1000

(459 to 573)

293 per 1000

RD 0.19 (0.12 to 0.26)

2918 (6 studies)

⊕⊕⊝⊝
low1,2

NNTB 5 (95% CI 4 to 8)

Self‐reported fatigue (20‐100 scale)

Higher scores indicate higher fatigue problem levels

Mean fatigue
score was 2.6 points
lower (1.0 to
5.0 points lower) based on a 20‐100 scale

Baseline mean score 69.4 (SD 12.3)3

SMD ‐0.13 (‐0.18 to ‐0.08)

6168 (12 studies)

⊕⊕⊝⊝
low1,2

NNTB 18 (95% CI 12 to 29)

Self‐reported sleep problems

(0‐100 scale)

Higher scores indicate higher sleep problem levels

Mean sleep problems
score was 1.2 points
lower (0.2 higher to
5.5 points lower) based on a 0‐100 scale

Baseline mean score 68.0 (23.8)4

SMD ‐0.07 (‐0.15 to 0.01)

4547 (8 studies)

⊕⊕⊝⊝
low1,2

NNTB not calculated due to lack of statistically significant difference

Self‐reported health‐related quality of life (0‐100 scale)

Higher scores indicate higher burden of disease (lower quality of life)

Mean health‐related quality of life problems score was 3.9 points lower (2.3 to
5.3 points lower) based on a
0‐100 scale

Baseline mean score 57.9 (SD
14.1)5

SMD ‐0.20 (‐0.25 to ‐0.15)

6861 (14 studies)

⊕⊕⊝⊝
low1,2

NNTB 11 (95% CI 8 to 14)

Tolerability (withdrawal due to adverse events)

191 per 1000

(172 to 210)

102 per 1000

RD 0.07 (0.04 to 0.10)

7029 (15 studies)

⊕⊕⊝⊝
low1,2

NNTH 14 (95% CI 10 to 25)

Safety (serious adverse events)

18 per 1000

(16 to 20)

21 per 1000

RD ‐0.00 (‐0.01 to 0.00)

6732 (13 studies)

⊕⊝⊝⊝
Verylow1,2,6

NNTH not calculated due to lack of statistically significant difference

*The basis for the assumed risk (e.g. the median control group risk across studies) is provided in footnotes. The corresponding risk (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; FIQ: Fibromyalgia Impact Questionnaire; MFI: Multidimensional Fatigue Inventory; MOS‐Sleep problem index: Medical Outcome Study ‐ sleep problem index; NNTB: number needed to treat for an additional beneficial outcome; NNTH: number needed to treat for an additional harm; NRS: numerical rating scale; RD: risk difference; SMD: standardized mean difference; VAS: visual analog scale

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 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.

1Downgraded once: indirectness: participants with major medical diseases and mental disorders except major depression excluded in > 50% of studies
2Downgraded once: publication bias
3Clauw 2008: N = 401 participants; MFI NRS 20‐100 scale
4Mease 2009b: N = 223 participants; MOS Sleep problem index NRS 0‐100 scale
5Arnold 2010b; N = 509 participants; FIQ VAS 0‐80 scale
6Downgraded once: imprecision due to low event rate

Figuras y tablas -
Summary of findings 1. Serotonin noradrenaline reuptake inhibitors compared with placebo for fibromyalgia ‐ studies with parallel design
Table 1. Subgroup analysis. Efficacy and safety of SNRIs in studies with North American and European participants

Outcome

Number

of

participants (studies)

Effect size

RD (95% CI)

Test for

overall

effect

P value

Heterogeneity

(%)

 

Test of interaction:

effect estimate and P value

Self‐reported pain relief 50% or greater

 

 

 

 

 Z = 0.78; P = 0.43

Only North American participants

3935 (8)

0.10 (0.08 to 0.13)

< 0.001

0

Only European participants

960 (2)

0.06 (0.01 to 0.12)

0.02

0

 

Withdrawal due to adverse events

 

 

 

 

 Z = 1.14; P = 0.25

Only North American participants

3935 (8)

0.08 (0.04 to 0.13)

< 0.0002

71

Only European participants

960 (2)

0.12 (0.08 to 0.17)

< 0.0001

0

 

CI: confidence interval; RD: risk difference; SNRIs: serotonin and noradrenaline reuptake inhibitors

Figuras y tablas -
Table 1. Subgroup analysis. Efficacy and safety of SNRIs in studies with North American and European participants
Comparison 1. SNRIs versus placebo in parallel and cross‐over design trials

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1.1 Self‐reported pain relief of 50% or greater Show forest plot

15

6918

Risk Difference (IV, Random, 95% CI)

0.09 [0.07, 0.11]

1.1.1 Duloxetine

7

2582

Risk Difference (IV, Random, 95% CI)

0.10 [0.06, 0.14]

1.1.2 Milnacipran

8

4336

Risk Difference (IV, Random, 95% CI)

0.09 [0.06, 0.11]

1.2 PGIC much or very much improved Show forest plot

6

2918

Risk Difference (M‐H, Random, 95% CI)

0.19 [0.12, 0.26]

1.2.1 Duloxetine

1

530

Risk Difference (M‐H, Random, 95% CI)

0.35 [0.27, 0.42]

1.2.2 Milnacipran

5

2388

Risk Difference (M‐H, Random, 95% CI)

0.15 [0.11, 0.19]

1.3 Withdrawal due to adverse events Show forest plot

15

7029

Risk Difference (IV, Random, 95% CI)

0.07 [0.04, 0.10]

1.3.1 Desvenlafaxine

1

82

Risk Difference (IV, Random, 95% CI)

‐0.03 [‐0.09, 0.04]

1.3.2 Duloxetine

7

2642

Risk Difference (IV, Random, 95% CI)

0.05 [0.02, 0.07]

1.3.3 Milnacipran

7

4305

Risk Difference (IV, Random, 95% CI)

0.11 [0.07, 0.14]

1.4 Serious adverse events Show forest plot

13

6732

Risk Difference (IV, Random, 95% CI)

‐0.00 [‐0.01, 0.00]

1.4.1 Desvenlafaxine

1

82

Risk Difference (IV, Random, 95% CI)

0.00 [‐0.05, 0.05]

1.4.2 Duloxetine

6

2432

Risk Difference (IV, Random, 95% CI)

‐0.00 [‐0.01, 0.01]

1.4.3 Milnacipran

6

4218

Risk Difference (IV, Random, 95% CI)

‐0.00 [‐0.01, 0.01]

1.5 Self‐reported fatigue Show forest plot

12

6168

Std. Mean Difference (IV, Random, 95% CI)

‐0.13 [‐0.18, ‐0.08]

1.5.1 Duloxetine

5

1954

Std. Mean Difference (IV, Random, 95% CI)

‐0.12 [‐0.21, ‐0.03]

1.5.2 Milnacpran

7

4214

Std. Mean Difference (IV, Random, 95% CI)

‐0.14 [‐0.21, ‐0.07]

1.6 Self‐reported sleep problems Show forest plot

8

4547

Std. Mean Difference (IV, Random, 95% CI)

‐0.07 [‐0.15, 0.01]

1.6.1 Duloxetine

3

1382

Std. Mean Difference (IV, Random, 95% CI)

‐0.20 [‐0.31, ‐0.10]

1.6.2 Milnacipran

5

3165

Std. Mean Difference (IV, Random, 95% CI)

0.02 [‐0.05, 0.10]

1.7 Self‐reported health‐related quality of life Show forest plot

14

6861

Std. Mean Difference (IV, Random, 95% CI)

‐0.20 [‐0.25, ‐0.15]

1.7.1 Duloxetine

7

2604

Std. Mean Difference (IV, Random, 95% CI)

‐0.22 [‐0.30, ‐0.13]

1.7.2 Milnacipran

7

4257

Std. Mean Difference (IV, Random, 95% CI)

‐0.19 [‐0.25, ‐0.12]

1.8 Self‐reported pain relief of 30% or greater Show forest plot

15

6924

Risk Difference (IV, Random, 95% CI)

0.10 [0.08, 0.12]

1.8.1 Duloxetine

7

2588

Risk Difference (IV, Random, 95% CI)

0.11 [0.07, 0.15]

1.8.2 Milnacipran

8

4336

Risk Difference (IV, Random, 95% CI)

0.10 [0.07, 0.13]

1.9 Self‐reported mean pain intensity Show forest plot

16

7014

Std. Mean Difference (IV, Random, 95% CI)

‐0.22 [‐0.27, ‐0.17]

1.9.1 Desvenlafaxine

1

82

Std. Mean Difference (IV, Random, 95% CI)

0.16 [‐0.27, 0.59]

1.9.2 Duloxetine

7

2619

Std. Mean Difference (IV, Random, 95% CI)

‐0.26 [‐0.35, ‐0.18]

1.9.3 Milncipran

8

4313

Std. Mean Difference (IV, Random, 95% CI)

‐0.20 [‐0.26, ‐0.13]

1.10 Self‐reported depression Show forest plot

14

6478

Std. Mean Difference (IV, Random, 95% CI)

‐0.16 [‐0.21, ‐0.11]

1.10.1 Duloxetine

7

2264

Std. Mean Difference (IV, Random, 95% CI)

‐0.25 [‐0.34, ‐0.17]

1.10.2 Milnacipran

7

4214

Std. Mean Difference (IV, Random, 95% CI)

‐0.11 [‐0.17, ‐0.05]

1.11 Self‐reported anxiety Show forest plot

9

3533

Std. Mean Difference (IV, Random, 95% CI)

‐0.08 [‐0.21, 0.05]

1.11.1 Duloxetine

4

1403

Std. Mean Difference (IV, Random, 95% CI)

‐0.07 [‐0.17, 0.04]

1.11.2 Milnacipran

5

2130

Std. Mean Difference (IV, Random, 95% CI)

‐0.11 [‐0.36, 0.13]

1.12 Self‐reported disability Show forest plot

13

6789

Std. Mean Difference (IV, Random, 95% CI)

‐0.21 [‐0.26, ‐0.16]

1.12.1 Duloxetine

7

2602

Std. Mean Difference (IV, Random, 95% CI)

‐0.29 [‐0.37, ‐0.21]

1.12.2 Milnacipran

6

4187

Std. Mean Difference (IV, Random, 95% CI)

‐0.16 [‐0.22, ‐0.10]

1.13 Self‐reported cognitive disturbances Show forest plot

8

5444

Std. Mean Difference (IV, Random, 95% CI)

‐0.16 [‐0.21, ‐0.10]

1.13.1 Duloxetine

3

1360

Std. Mean Difference (IV, Random, 95% CI)

‐0.27 [‐0.38, ‐0.16]

1.13.2 Milnacipran

5

4084

Std. Mean Difference (IV, Random, 95% CI)

‐0.12 [‐0.18, ‐0.05]

1.14 Tenderness Show forest plot

5

1444

Std. Mean Difference (IV, Random, 95% CI)

‐0.21 [‐0.33, ‐0.09]

1.14.1 Duloxetine

4

1364

Std. Mean Difference (IV, Random, 95% CI)

‐0.23 [‐0.35, ‐0.12]

1.14.2 Milnacipran

1

80

Std. Mean Difference (IV, Random, 95% CI)

0.12 [‐0.31, 0.56]

1.15 Withdrawal due to lack of efficacy Show forest plot

14

6924

Risk Difference (IV, Random, 95% CI)

‐0.03 [‐0.04, ‐0.02]

1.15.1 Desvenlafaxine

1

82

Risk Difference (IV, Random, 95% CI)

0.07 [‐0.02, 0.16]

1.15.2 Duloxetine

7

2642

Risk Difference (IV, Random, 95% CI)

‐0.04 [‐0.06, ‐0.02]

1.15.3 Milnacipran

6

4200

Risk Difference (IV, Random, 95% CI)

‐0.02 [‐0.04, ‐0.01]

1.16 Nausea Show forest plot

12

6606

Risk Difference (IV, Random, 95% CI)

0.16 [0.14, 0.19]

1.16.1 Desvenlafaxine

1

82

Risk Difference (IV, Random, 95% CI)

0.04 [‐0.10, 0.18]

1.16.2 Duloxetine

6

2432

Risk Difference (IV, Random, 95% CI)

0.19 [0.15, 0.22]

1.16.3 Milnacipran

5

4092

Risk Difference (IV, Random, 95% CI)

0.15 [0.12, 0.18]

1.17 Somnolence Show forest plot

7

2514

Risk Difference (IV, Random, 95% CI)

0.05 [0.02, 0.08]

1.17.1 Desvenlafaxine

1

82

Risk Difference (IV, Random, 95% CI)

‐0.05 [‐0.17, 0.06]

1.17.2 Duloxetine

6

2432

Risk Difference (IV, Random, 95% CI)

0.06 [0.03, 0.09]

1.18 Insomnia Show forest plot

9

5387

Risk Difference (M‐H, Random, 95% CI)

0.03 [0.01, 0.04]

1.18.1 Desvenlafaxine

1

82

Risk Difference (M‐H, Random, 95% CI)

‐0.08 [‐0.18, 0.03]

1.18.2 Duloxetine

4

1684

Risk Difference (M‐H, Random, 95% CI)

0.04 [0.01, 0.07]

1.18.3 Milnacipran

4

3621

Risk Difference (M‐H, Random, 95% CI)

0.03 [0.01, 0.04]

Figuras y tablas -
Comparison 1. SNRIs versus placebo in parallel and cross‐over design trials