The Effect of Zao Ren An Shen Capsule on Insomnia among Patients with Anxiety: A Randomized Controlled Trial

Table 1

Baseline characteristics of the study population.

Characteristics	Mean (SD)
	Intervention group, n = 167	Control group, n = 167
Age	46.0 (13.4)	44.4 (12.8)
Sex, female, no. (%)	73 (43.7)	72 (43.1)
Marital status, no. (%)
Married	143 (85.6)	148 (88.6)
Divorced	6 (3.6)	8 (4.8)
Widowed	5 (3.0)	1 (0.6)
Single	13 (7.8)	10 (6.0)
Education, no. (%)
High school or less	92 (55.1)	77 (46.1)
College or above	75 (44.9)	90 (53.9)
ISI score	16.3 (2.0)	16.4 (2.1)
HAMA score	18.5 (3.6)	17.9 (2.5)

ISI, the insomnia severity index; scores range from 0 to 28; higher scores indicate more severe insomnia. HAMA, the Hamilton anxiety rating scale; scores range from 0 to 56; higher scores indicate more severe anxiety; 0–17 indicates mild severity, 18–24 mild to moderate severity, and 25–30 moderate to severe.