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Antagonista muscarínico de acción prolongada (AMAP) más agonista beta de acción prolongada (ABAP) versus ABAP más corticosteroide inhalado (CSI) para la enfermedad pulmonar obstructiva crónica (EPOC) estable

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Información

DOI:
https://doi.org/10.1002/14651858.CD012066.pub2Copiar DOI
Base de datos:
  1. Cochrane Database of Systematic Reviews
Versión publicada:
  1. 10 febrero 2017see what's new
Tipo:
  1. Intervention
Etapa:
  1. Review
Grupo Editorial Cochrane:
  1. Grupo Cochrane de Vías respiratorias

Copyright:
  1. Copyright © 2018 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

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Autores

  • Nobuyuki Horita

    Correspondencia a: Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

    [email protected]

    [email protected]

  • Atsushi Goto

    Metabolic Epidemiology Section, Division of Epidemiology, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan, Tokyo, Japan

  • Yuji Shibata

    Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

  • Erika Ota

    Global Health Nursing, St. Luke's International University, Graduate School of Nursing Sciences, Tokyo, Japan

  • Kentaro Nakashima

    Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

  • Kenjiro Nagai

    Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

  • Takeshi Kaneko

    Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan

Contributions of authors

NH conducted the study search, data extraction, analysis, study quality assessment, and drafting as a principal investigator.

AG provided statistical advice.

YS conducted the study search, study quality assessment, and data extraction.

EO managed editing of the full review as a Cochrane methodologist.

KN, KN, and TK contributed to the conception, study design, interpretation of the data, and critical revision as pulmonologists.

Sources of support

Internal sources

  • Grant from the National Center for Child Health and Development 26A‐5, Japan.

External sources

  • Japan Agency for Medical Research and Development, Japan.

    AMED No. 27300101

Declarations of interest

TK: received grants or lecture fees (or both) from GlaxoSmithKline, Boehringer Ingelheim, Pfizer, Meiji, AstraZeneca, and Novartis from 2013 to 2016. This review was not funded by any pharmaceutical companies.

HN, GA, SY, OE, NK, and NK: none known.

Acknowledgements

We would like to thank Ms Emma Barber from the National Center for Child Health and Development for editorial assistance.

We also would like to thank Mrs Elizabeth Stovold from the Cochrane Airways Group for constructing the search formula.

Dr Ian Yang was the Editor for the protocol and commented critically upon it.

The 'Background' and 'Methods' sections of this review were based on a standard template used by the Cochrane Airways Group.

This project was supported by the National Institute for Health Research (NIHR), via Cochrane Infrastructure funding to the Cochrane Airways Group. The views and opinions expressed herein are those of the review authors and do not necessarily reflect those of the Systematic Reviews Programme, NIHR, National Health System or the Department of Health.

Version history

Published

Title

Stage

Authors

Version

2023 Jun 05

Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS) for stable chronic obstructive pulmonary disease

Review

Nobuhiko Fukuda, Nobuyuki Horita, Ayami Kaneko, Atsushi Goto, Takeshi Kaneko, Erika Ota, Kayleigh M Kew

https://doi.org/10.1002/14651858.CD012066.pub3

2017 Feb 10

Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS) for stable chronic obstructive pulmonary disease (COPD)

Review

Nobuyuki Horita, Atsushi Goto, Yuji Shibata, Erika Ota, Kentaro Nakashima, Kenjiro Nagai, Takeshi Kaneko

https://doi.org/10.1002/14651858.CD012066.pub2

2016 Feb 02

Long‐acting muscarinic antagonist plus long‐acting beta agonist versus long‐acting beta agonist plus inhaled corticosteroid for stable chronic obstructive pulmonary disease

Protocol

Nobuyuki Horita, Atsushi Goto, Erika Ota, Kentaro Nakashima, Kenjiro Nagai, Takeshi Kaneko

https://doi.org/10.1002/14651858.CD012066

Differences between protocol and review

Yuji Shibata was added as the third review author.

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.

Study flow diagram.
Figuras y tablas -
Figure 1

Study flow diagram.

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
Figuras y tablas -
Figure 2

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

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.1 Exacerbation.
Figuras y tablas -
Figure 3

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.1 Exacerbation.

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.2 Serious adverse events.
Figuras y tablas -
Figure 4

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.2 Serious adverse events.

Funnel plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.2 Serious adverse events.
Figuras y tablas -
Figure 5

Funnel plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.2 Serious adverse events.

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), outcome: 1.3 St. George's Respiratory Questionnaire (SGRQ) total score change from the baseline (mean difference).
Figuras y tablas -
Figure 6

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), outcome: 1.3 St. George's Respiratory Questionnaire (SGRQ) total score change from the baseline (mean difference).

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.4 Trough forced expiratory volume in one second (FEV1) change from the baseline.
Figuras y tablas -
Figure 7

Forest plot of comparison: 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus ICS (inhaled corticosteroid), outcome: 1.4 Trough forced expiratory volume in one second (FEV1) change from the baseline.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 1 Exacerbation.
Figuras y tablas -
Analysis 1.1

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 1 Exacerbation.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 2 Serious adverse effect.
Figuras y tablas -
Analysis 1.2

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 2 Serious adverse effect.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 3 St. George's Respiratory Questionnaire (SGRQ) total score change from the baseline (mean difference).
Figuras y tablas -
Analysis 1.3

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 3 St. George's Respiratory Questionnaire (SGRQ) total score change from the baseline (mean difference).

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 4 Trough forced expiratory volume in 1 second (FEV1) change from the baseline.
Figuras y tablas -
Analysis 1.4

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 4 Trough forced expiratory volume in 1 second (FEV1) change from the baseline.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 5 Pneumonia.
Figuras y tablas -
Analysis 1.5

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 5 Pneumonia.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 6 All‐cause death.
Figuras y tablas -
Analysis 1.6

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 6 All‐cause death.

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 7 SGRQ total score improvement from the baseline (≥ 4 units).
Figuras y tablas -
Analysis 1.7

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 7 SGRQ total score improvement from the baseline (≥ 4 units).

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 8 Total SGRQ change from the baseline (excluding unblinded studies).
Figuras y tablas -
Analysis 1.8

Comparison 1 Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS), Outcome 8 Total SGRQ change from the baseline (excluding unblinded studies).

Summary of findings for the main comparison. Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS) for stable chronic obstructive pulmonary disease (COPD)

LAMA + LABA versus LABA + ICS for stable COPD

Population: stable COPD
Setting: outpatient. Studies were conducted in > 50 countries including low‐, medium‐ and high‐income countries from all continents.
Intervention: LAMA+LABA
Comparison: LABA+ICS

Outcomes

Anticipated absolute effects* (95% CI)

Relative effects

Number of participants
(studies)

Quality of the evidence
(GRADE)

Comments

LABA+ICS

LAMA+LABA

Exacerbations (number of people experiencing ≥ 1 exacerbations)

Follow‐up: 12 to 52 weeks

377 per 1000

332 per 1000

(298 to 368)

OR 0.82
(0.70 to 0.96)

8922
(9 RCTs)

⊕⊕⊝⊝
Low 1,2

Low OR means favourable outcome

Serious adverse effects

Follow‐up: 12 to 52 weeks

96 per 1000

87 per 1000
(77 to 100)

OR 0.91
(0.79 to 1.05)

9793
(10 RCTs)

⊕⊕⊕⊝
Moderate 1

Low OR means favourable outcome

SGRQ total score change from the baseline

(MD)

Follow‐up: 12 to 52 weeks

MD ‐1.22

(‐2.52 to 0.07)

6055

(6 RCTs)

⊕⊕⊝⊝
Low 1,3

Low MD means favourable outcome

Trough FEV1 change from the baseline

Follow‐up: 12 to 52 weeks

MD 0.08 L

(0.06 to 0.09)

6238

(6 RCTs)

⊕⊕⊕⊝
Moderate 1

High MD means favourable outcome

Pneumonia

Follow‐up: 12 to 52 weeks

26 per 1000

15 per 1000
(11 to 20)

OR 0.57
(0.42 to 0.79)

8540
(8 RCTs)

⊕⊕⊝⊝
Low 1,4

Low OR means favourable outcome

All‐cause death

Follow‐up: 12 to 52 weeks

7 per 1000

7 per 1000
(4 to 11)

OR 1.01
(0.61 to 1.67)

8200
(8 RCTs)

⊕⊕⊝⊝
Low 1,4

Low OR means favourable outcome

SGRQ total score change from the baseline

(≥ 4 points, MCID)

Follow‐up: 24 to 52 weeks

445 per 1000

500 per 1000

(466 to 535)

OR 1.25

(1.09 to 1.44)

3192

(2 RCTs)

⊕⊕⊕⊝
Moderate 1

High OR means favourable outcome

*The absolute risk (and its 95% CI) of LAMA+LABA group is based on the assumed risk in the LABA+ICS group and the OR of the intervention (and its 95% CI).
CI: confidence interval; COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in one second; ICS: inhaled corticosteroid; LABA: long‐acting beta‐agonist; LAMA: long‐acting muscarinic antagonist; MCID: minimal clinically important difference; MD: mean difference; OR: odds ratio; RCT: randomised controlled trial; SGRQ: St. George's Respiratory Questionnaire.

GRADE Working Group grades of evidence

High quality: We are very confident that the true effect lies close to that of the estimate of 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 may be substantially different
Low quality: Our confidence in the effect estimate is limited: The true effect may be substantially different from the estimate of 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

1 Every study had at least one domain of high risk of bias mostly due to conflicts of interest.

2 Indirectness due to definition of exacerbation.

3 There was a considerable heterogeneity, I2 = 71%.

4 Downgraded due to imprecision.

Figuras y tablas -
Summary of findings for the main comparison. Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS) for stable chronic obstructive pulmonary disease (COPD)
Table 1. Summary of characteristics of included studies

Study

LAMA+LABA

LABA+ICS

Key inclusion criteria

Follow‐up duration (weeks)

Mean/median age (years)

Number randomised

Beeh 2016

Tiotropium/olodaterol (2.5/5 μg) or tiotropium/olodaterol (5/5 μg)

Salmeterol/fluticasone (50/250 μg) twice daily or salmeterol/fluticasone (50/500 μg) twice daily.

%pred FEV1 30% to 80% Ex(‐)

6 × 4 time periods (cross‐over)

64

229

Donohue 2015a

Umeclidinium/vilanterol (62.5/25 μg)

Salmeterol/fluticasone (50/250 μg) twice daily

%pred FEV1 30% to 70%, mMRC ≥ 2, Ex(‐)

12

63

707

Donohue 2015b

Umeclidinium/vilanterol (62.5/25 μg)

Salmeterol/fluticasone (50/250 μg) twice daily

%pred FEV1 30% to 70%, mMRC ≥ 2, Ex(‐)

12

64

700

Hoshino 2015

Tiotropium/indacaterol (18/150 μg)

Salmeterol/fluticasone (50/250 μg) twice daily

%pred FEV1 30% to 80%, Ex(‐)

16

71

46

Magnussen 2012

Tiotropium/salmeterol (18/50 μg) twice daily

Salmeterol/fluticasone (50/500 μg) twice daily

%pred FEV1 ≤ 65%, Ex(‐)

8 x 2 time periods (cross‐over)

61

344

Rabe 2008

Tiotropium/formoterol (18/24 μg) twice daily

Salmeterol/fluticasone (50/500 μg) twice daily

%pred FEV1 ≤ 65%, Ex(‐)

6

62

605

Singh 2015

Umeclidinium/vilanterol (62.5/25 μg)

Salmeterol/fluticasone (50/500 μg) twice daily

%pred FEV1 30% to 70%, mMRC ≥ 2, Ex(‐)

12

62

717

Vogelmeier 2013

Indacaterol/glycopyrronium bromide (110/50 μg)

Salmeterol/fluticasone (50/500 μg) twice daily

Stage II/III, Ex(‐)

26

63

523

Vogelmeier 2016

Aclidinium/formoterol (400/12 μg) twice daily

Salmeterol/fluticasone (50/500 μg) twice daily

%pred FEV1 < 80%, CAT ≥ 10, Ex(‐)

24

63

933

Wedzicha 2016

Indacaterol/glycopyrronium bromide (110/50 μg)

Salmeterol/fluticasone (50/500 μg) twice daily

%pred FEV1 25% to 60%, mMRC ≥ 2, Ex(+)

52

65

3362

Zhong 2015

Indacaterol/glycopyrronium bromide (110/50 μg)

Salmeterol/fluticasone (50/500 μg) twice daily

Stage II/III, mMRC ≥ 2, Ex(‐)

26

65

744

%pred FEV1: % predicted forced expiratory volume in one second; CAT: chronic obstructive pulmonary disease assessment test; Ex(‐): without recent exacerbation; Ex(+): with recent exacerbation; LABA: long‐acting beta‐agonist; LAMA: long‐acting muscarinic antagonist; mMRC: modified Medical Research Council dyspnoea scale.

Figuras y tablas -
Table 1. Summary of characteristics of included studies
Table 2. Sponsor list for chronic obstructive pulmonary disease studies

Sponsor

Record count

% of 1723

GlaxoSmithKline

134

7.78

Novartis

128

7.43

AstraZeneca

122

7.08

Boehringer Ingelheim

113

6.56

Pfizer

84

4.88

Nycomed

49

2.84

GSK

45

2.61

Chiesi

41

2.38

Almirall

36

2.09

Merck

30

1.74

Web of Science Core Collection, advanced search for "TI=(COPD) AND TS=(inhal*)" without any restriction hit 1723 reports as of 13 June 2016. "Results analysis" > "Source Titles" output the table above.

Figuras y tablas -
Table 2. Sponsor list for chronic obstructive pulmonary disease studies
Comparison 1. Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS)

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Exacerbation Show forest plot

9

8922

Odds Ratio (M‐H, Random, 95% CI)

0.82 [0.70, 0.96]

1.1 Indacaterol/glycopyrronium

3

4617

Odds Ratio (M‐H, Random, 95% CI)

0.72 [0.63, 0.83]

1.2 Umeclidinium/vilanterol

3

2119

Odds Ratio (M‐H, Random, 95% CI)

1.15 [0.64, 2.06]

1.3 Other LAMA/LABA inhalers

3

2186

Odds Ratio (M‐H, Random, 95% CI)

1.02 [0.78, 1.34]

2 Serious adverse effect Show forest plot

10

9793

Odds Ratio (M‐H, Random, 95% CI)

0.91 [0.79, 1.05]

2.1 Indacaterol/glycopyrronium

3

4621

Odds Ratio (M‐H, Random, 95% CI)

0.82 [0.61, 1.10]

2.2 Umeclidinium/vilanterol

3

2119

Odds Ratio (M‐H, Random, 95% CI)

1.00 [0.43, 2.31]

2.3 Other LAMA/LABA inhalers

4

3053

Odds Ratio (M‐H, Random, 95% CI)

1.10 [0.77, 1.57]

3 St. George's Respiratory Questionnaire (SGRQ) total score change from the baseline (mean difference) Show forest plot

6

5858

Mean Difference (Random, 95% CI)

‐1.22 [‐2.52, 0.07]

3.1 Indacaterol/glycopyrronium

2

3693

Mean Difference (Random, 95% CI)

‐1.29 [‐2.08, ‐0.50]

3.2 Umeclidinium/vilanterol

3

2119

Mean Difference (Random, 95% CI)

‐0.08 [‐1.34, 1.18]

3.3 Other LAMA/LABA inhalers

1

46

Mean Difference (Random, 95% CI)

‐5.0 [‐7.35, ‐2.65]

4 Trough forced expiratory volume in 1 second (FEV1) change from the baseline Show forest plot

6

7277

Mean Difference (Random, 95% CI)

0.08 [0.06, 0.09]

4.1 Indacaterol/glycopyrronium

2

4291

Mean Difference (Random, 95% CI)

0.08 [0.04, 0.12]

4.2 Umeclidinium/vilanterol

3

2119

Mean Difference (Random, 95% CI)

0.09 [0.07, 0.11]

4.3 Other LAMA/LABA inhalers

1

867

Mean Difference (Random, 95% CI)

0.05 [0.02, 0.08]

5 Pneumonia Show forest plot

8

8540

Odds Ratio (M‐H, Random, 95% CI)

0.57 [0.42, 0.79]

5.1 Indacaterol/glycopyrronium

3

4621

Odds Ratio (M‐H, Random, 95% CI)

0.50 [0.25, 1.00]

5.2 Umeclidinium/vilanterol

3

2119

Odds Ratio (M‐H, Random, 95% CI)

0.37 [0.11, 1.29]

5.3 Other LAMA/LABA inhalers

2

1800

Odds Ratio (M‐H, Random, 95% CI)

0.40 [0.09, 1.76]

6 All‐cause death Show forest plot

8

8200

Odds Ratio (M‐H, Random, 95% CI)

1.01 [0.61, 1.67]

6.1 Indacaterol/glycopyrronium

3

4621

Odds Ratio (M‐H, Random, 95% CI)

1.02 [0.59, 1.78]

6.2 Umeclidinium/vilanterol

3

2120

Odds Ratio (M‐H, Random, 95% CI)

0.78 [0.19, 3.18]

6.3 Other LAMA/LABA inhalers

2

1459

Odds Ratio (M‐H, Random, 95% CI)

1.59 [0.20, 12.96]

7 SGRQ total score improvement from the baseline (≥ 4 units) Show forest plot

2

3192

Odds Ratio (M‐H, Random, 95% CI)

1.25 [1.09, 1.44]

7.1 Indacaterol/glycopyrronium

2

3192

Odds Ratio (M‐H, Random, 95% CI)

1.25 [1.09, 1.44]

8 Total SGRQ change from the baseline (excluding unblinded studies) Show forest plot

5

6360

Mean Difference (Random, 95% CI)

‐0.70 [‐1.58, 0.18]

8.1 Indacaterol/glycopyrronium

2

4241

Mean Difference (Random, 95% CI)

‐1.29 [‐2.08, ‐0.50]

8.2 Umeclidinium/vilanterol

3

2119

Mean Difference (Random, 95% CI)

‐0.08 [‐1.34, 1.18]

Figuras y tablas -
Comparison 1. Long‐acting muscarinic antagonist (LAMA) plus long‐acting beta‐agonist (LABA) versus LABA plus inhaled corticosteroid (ICS)