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What do systematic reviews say?

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Evidence found and GRADE certainty

6 questions · 6 findings · 1 reviews

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 1 · 16.7%Low 1 · 16.7%Moderate 3 · 50%High 1 · 16.7%

Summary of findings table ‐ immunostimulant vs placebo

Participants with no exacerbations in study period · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant probably leads to higher number of participants with no exacerbations during the study period compared with placebo (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ immunostimulant vs placebo

Mortality (all‐cause) · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant showed no clear difference in mortality (all‐cause) compared with placebo (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ immunostimulant vs placebo

Respiratory‐related mortality · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant showed no clear difference in mortality (respiratory‐related) compared with placebo (low certainty).

1 finding from 1 review

Summary of findings table ‐ immunostimulant vs placebo

Number of participants requiring antibiotics · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant probably leads to lower number of participants requiring antibiotics compared with placebo (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ immunostimulant vs placebo

Side effects or other adverse events · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant showed no clear difference in adverse events/side effects compared with placebo (high certainty).

1 finding from 1 review