In Vitro and Randomized, Double‐Blind, Placebo‐Controlled Trial to Determine the Efficacy and Safety of Nine Antiacne Medicinal Plants

Table 4

Acne severity index (ASI) was evaluated in a double-blind, randomized, and controlled efficacy study with 41 acne patients, aged 18‐24 years, who were asked to apply placebo (n = 14) 2-3 times daily for 6 weeks.

ASI (acne severity index) of placebo group
Patient no.	Baseline	Week 2	Week 5	Week 6
	ASI	ASI	ASI	ASI
1	13.75	13.50	13.50	13.25
2	14.00	13.75	13.75	13.50
3	23.00	22.50	22.50	22.50
4	23.50	23.25	23.25	23.25
5	10.50	11.00	11.00	11.00
6	15.00	15.25	15.25	15.50
7	16.50	16.00	16.50	16.00
8	16.50	16.25	16.25	16.25
9	20.50	20.25	20.25	20.25
10	26.25	26.00	26.50	26.25
11	32.00	32.50	33.00	33.00
12	31.50	31.25	31.25	31.25
13	26.25	26.00	26.00	26.00
14	15.25	15.50	16.00	16.25
Average	20.32	20.21	20.36	20.30
STDEV	6.86	6.83	6.88	6.90
St. err.	1.50	1.49	1.50	1.51
	t	1.19	−2.28	1.00
		0.250	0.038	0.33