Table 4.

Subgroup analysis of the total effective rate for each variable.

Variable	Effects model	RR	95% CI	Figure	P value	Heterogeneity (chi-squared test and I2 statistic)	Total patients
Duration
≤21 d	Fixed	1.15	1.05–1.25	4	0.001	P = 0.42, I2 = 1%	405
＞21 d	Fixed	1.31	1.19–1.44	4	＜0.00001	P = 0.19, I2 = 31%	505
The dose of Banxia
≤9 g	Fixed	1.30	1.14–1.49	5	0.0001	P = 0.45, I2 = 0%	247
＞9 g	Fixed	1.21	1.12–1.30	5	＜0.00001	P = 0.13, I2 = 35%	663
The proceeding method of Banxia
Banxia	Fixed	1.18	1.07–1.31	6	0.001	P = 0.77, I2 = 0%	292
Fabanxia	Fixed	1.15	1.04–1.26	6	0.005	P = 0.29, I2 = 19%	336
Jiangbanxia	Fixed	1.50	1.24–1.83	6	＜0.0001	P = 0.98, I2 = 0%	170