Comparison 5. Days of productive cough.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mean number of days of productive cough	6	699	Mean Difference (IV, Fixed, 95% CI)	‐0.43 [‐0.93, 0.07]
1.1 Acute bronchitis studies	5	535	Mean Difference (IV, Fixed, 95% CI)	‐0.52 [‐1.03, ‐0.01]
1.2 Subgroup with productive cough from URTI study	1	164	Mean Difference (IV, Fixed, 95% CI)	1.04 [‐1.04, 3.12]