Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,973 questions · 3,072 findings · 410 reviews · Headline outcomes only

No studies found 559 · 18.2%GRADE not reported 143 · 4.7%Very low 654 · 21.3%Low 833 · 27.1%Moderate 683 · 22.2%High 200 · 6.5%

Long‐acting beta2‐agonist plus tiotropium vs tiotropium

Mortality (all cause) · addition to tiotropium versus either tiotropium or LABA alone for chronic obstructive pulmonary disease

Long‐acting beta2‐agonist plus tiotropium showed no clear difference in mortality (all cause) compared with tiotropium alone (low certainty).

1 finding from 1 review

Long‐acting beta2‐agonist plus tiotropium vs long‐acting beta2‐agonist alone

Quality of life SGRQ responder analysis at 6 months · addition to tiotropium versus either tiotropium or LABA alone for chronic obstructive pulmonary disease

Long‐acting beta2‐agonist plus tiotropium probably leads to higher quality of life SGRQ responder analysis at 6 months compared with long‐acting beta2‐agonist alone (moderate certainty).

1 finding from 1 review

Long‐acting beta2‐agonist plus tiotropium vs long‐acting beta2‐agonist alone

Hospital admissions · addition to tiotropium versus either tiotropium or LABA alone for chronic obstructive pulmonary disease

Long‐acting beta2‐agonist plus tiotropium showed no clear difference in hospital admission (all cause) compared with long‐acting beta2‐agonist alone (moderate certainty).

1 finding from 1 review

Tiotropium vs ipratropium

Mortality (all‐cause) · chronic obstructive pulmonary disease (COPD). Participants in included studies had an average baseline FEV1 of around 40% predicted and…

Tiotropium showed no clear difference in mortality (all‐cause) compared with ipratropium (moderate certainty).

1 finding from 1 review