Efficacy and Safety of Lianhuaqingwen Capsules for the Prevention of Coronavirus Disease 2019: A Prospective Open-Label Controlled Trial

Table 2

Comparison of positive rates between the two groups.

Follow-up time point	Positive rate	N = 1976		value
		LH group; (N = 1101)	Control group; (N = 875)
Isolation period	Positive, N (%)	3 (0.27)	10 (1.14)	0.0174
Rate difference (LH group − control group) % (95% CI)			−0.87 (−1.83 to −0.13)