Table 2: Subgroups of clinical efficacy of Chinese medicine symptoms and their descriptions.

SubgroupsDescriptions

Clinical cure ≥ 95%
Obvious effect70% ≤ < 95%
Showing effect30% ≤ < 70%
No effect < 30%

Efficacy index () = (points before treatment − points after treatment)/points before treatment 100%. 0 points: no cough; 3 points: coughing occasionally; 6 points: coughing frequently; 9 points: coughing persistently.