Efficacy and Safety of Chuanxiong Qingnao Granule in Patients with Migraine: A Randomized, Double-Blind, Placebo-Controlled Trial

Table 5

Usage of acute analgesics, n (%).

	Treatment	Control	value
Baseline	78 (45.3)	83 (47.7)	0.661
1–4 weeks	25 (14.5)	48 (27.6)	0.003
5–8 weeks	18 (10.5)	43 (24.7)	0.001
9–12 weeks	26 (15.1)	57 (32.8)	0.000
13–16 weeks	23 (13.4)	69 (39.7)	0.000
17–20 weeks	31 (18.0)	61 (35.1)	0.000
21–24 weeks	27 (15.7)	58 (33.3)	0.000