Table 3.

Prevalence of Substance Use in AN, AN-R, and AN-BP

Prevalence
Substance Use	k	n	I2 **	95% CIs	Prevalence in AN	n for AN-R	Prevalence in AN-R	n for AN-BP	Prevalence in AN-BP
Alcohol	5	677	70.56%	0.22,0.36	29%	172	31%	156	43%
Amphetamines	3	326		0.01, 0.06	3%	N/A	N/A	N/A	N/A
Barbiturates	2	160		0.00, 0.05	2%	N/A	N/A	N/A	N/A
Caffeine	3	107		0.08, 0.73	37%	N/A	N/A	N/A	N/A
Cannabis	5	720	95.18%	0.03, 0.28	14%	283	16%	211	33%
Cocaine	3	326		0.00, 0.04	1%	111	0%	55	0%
Diazepam	1*	26		0.00, 0.20	4%	N/A	N/A	N/A	N/A
Hallucinogens	2	161		0.00, 0.02	0%	N/A	N/A	N/A	N/A
Heroin	1*	166		0.00, 0.02	0%	N/A	N/A	N/A	N/A
Inhalants	2	148		0.00, 0.04	1%	N/A	N/A	N/A	N/A
Opiates	3	521		0.00, 0.24	5%	111	1%	55	2%
Phencyclidine	1*	26		0.00, 0.13	0%	N/A	N/A	N/A	N/A
Quaaludes	1*	26		0.00, 0.20	4%	N/A	N/A	N/A	N/A
Stimulants	2	383		0.11, 0.18	14%	N/A	N/A	N/A	N/A
Tobacco	9	1352	90.64%	0.16, 0.34	25%	255	26%	788	32%
Tranquilizers	1*	134		0.00, 0.06	2%	N/A	N/A	N/A	N/A
Other Substance Use	1*	328		0.10, 0.18	14%	N/A	N/A	N/A	N/A
Substance Use Total	4	769	94.27%	0.08, 0.34	20%	111	5%	55	18%

^*not derived from meta-analysis data, ** I² only derived when pooled meta-analysis included 4 or more studies

AN anorexia nervosa; AN-BP anorexia nervosa binge-eating/purge type; AN-R anorexia nervosa restrictive type; CIs = confidence intervals; k amount of studies