Table 1.

Demographic and behavioral data

	GHB‐Coma (N = 23)		GHB‐NoComa (N = 22)		No‐GHB (N = 24)		Difference
	Mean	±SD	Mean	±SD	Mean	±SD	p
Age	25.52	5.62	25.86	4.44	28.04	9.41	0.402a
Educational level	6.57	1.67	6.91	1.11	6.63	1.28	0.672a
Premorbid IQ	89.86	10.65	98.44	7.89	93.41	8.08	0.008a , b
Years since first use	5.70	3.94	4.45	2.11	–	–	0.575c
Daily dose (mL/day)	46.77	39.19	19.69	11.36	–	–	<0.001c
Days of GHB‐use in preceding 30 days	11.48	12.74	2.77	2.27	–	–	0.085c
Months of daily use	25.28	45.03	0.14	0.42	–	–	0.008c
Frame‐wise displacement	0.10	0.05	0.08	0.02	0.09	0.02	0.170a

Abbreviations: SD = standard deviation.

^aAnalysis of variance (ANOVA).

^bPost hoc Tukey HSD: premorbid IQ_GHB‐Coma<GHB‐NoComa p = 0.006.

^cMann–Whitney U.