. Author manuscript; available in PMC: 2021 Nov 28.

Published in final edited form as: Am J Drug Alcohol Abuse. 2019 Jul 2;46(1):31–43. doi: 10.1080/00952990.2019.1624764

Table 1.

Clinical characteristics of the participants.

	KU (M) n = 26	KU (W) n = 10	HC (M) n = 11	HC (W) n = 9	group effect p value
Age (years)	25.2 ± 5.8	27.5 ± 5.7	25.3 ± 4.5	25.1 ± 4.2	0.45
BIS-11 score	55.5 ± 7.1	60.0 ± 11.0	53.0 ± 7.4	48.6 ± 3.5	0.003
Ketamine use duration^* (months)	59.4 ± 37.0	59.0 ± 40.0	NA	NA	NA
Cigarette in 30 days (days)	24.5 ± 11.1	30.0 ± 0.0	1.5 ± 2.5	0.0 ± 0.0	3.6 × 10⁻¹⁶
Cigarette in life (years)	8.4 ± 4.7	12.1 ± 7.7	2.5 ± 3.5	0.0 ± 0.0	4.2 × 10⁻⁸
Alcohol in 30 days (days)	4.8 ± 8.5	9.0 ± 11.1	3.0 ± 3.8	0.4 ± 0.7	0.02
Alcohol in life (years)	4.3 ± 4.3	6.7 ± 6.2	5.2 ± 6.2	1.9 ± 3.4	0.18

All values are mean ± SD; KU: ketamine users; HC: healthy controls; BIS-11: Barratt Impulsivity Scale; M: men; W: women;

All p values were obtained from ANOVA except for ketamine use duration (*), where KU men and women were compared with a two sample t-test.