Fig. 4

The result of the forest plot analysis for the cough symptom score, cough relief time, and cough disappearance time between the Mon + Flu group and the Flu group. A The result of the forest plot analysis for the cough symptom score between the Mon + Flu group and the Flu group. A random-effect model was used since the I²=92%. The pooled results showed that Flu + Mon significantly reduced the cough remission time. B The result of the forest plot analysis for cough relief time between the Mon + Flu group and the Flu group. A random-effect model was used since the I²=65%. The pooled results showed that Flu + Mon significantly reduced the cough relief time. C The result of the forest plot analysis for cough disappearance time between the Mon + Flu group and the Flu group. A random-effect model was used since the I²=78%. The pooled results showed that Flu + Mon significantly reduced the cough disappearance time