Table 1.

Descriptive Statistics by Cannabis Use for Admissions from NHDS 1993–2000^a

	Alcohol Problem		Mood Disorders		Thought Disorders
	No Cannabis	Cannabis	No Cannabis	Cannabis	No Cannabis	Cannabis
Characteristics	Mean	Mean	Mean	Mean	Mean	Mean
Demographics
Age of patient in year	43.044	30.312	40.305	27.159	41.898	30.705
% male	0.753	0.739	0.378	0.550	0.539	0.784
% white	0.572	0.409	0.693	0.640	0.573	0.402
% black	0.133	0.082	0.088	0.106	0.211	0.337
% other race	0.027	0.029	0.028	0.021	0.045	0.030
% race unknown	0.268	0.480	0.191	0.233	0.171	0.231
% married	0.158	0.107	0.186	0.102	0.098	0.036
% single	0.214	0.237	0.256	0.406	0.380	0.466
% widowed/divorced/separated	0.132	0.068	0.130	0.060	0.126	0.049
% marital status unknown	0.496	0.588	0.429	0.432	0.396	0.449
Medical-related info
% alcohol dependence	0.848	0.924	0.098	0.253	0.063	0.224
% alcohol abuse	0.118	0.070	0.052	0.273	0.048	0.234
% tobaco dependence	0.083	0.155	0.023	0.091	0.025	0.079
% other illicit drug dependence	0.128	0.206	0.053	0.104	0.037	0.085
% other illicit drug abuse	0.054	0.144	0.065	0.217	0.076	0.227
% discharged home	0.845	0.814	0.912	0.913	0.875	0.893
% left against medical advice	0.095	0.118	0.028	0.032	0.025	0.021
% dead	0.002	0.000	0.001	0.000	0.001	0.000
% discharge status unknown	0.059	0.067	0.060	0.055	0.099	0.086
% public payment	0.419	0.395	0.464	0.364	0.727	0.695
% private payment	0.335	0.332	0.409	0.429	0.162	0.142
% self-payment	0.176	0.159	0.066	0.126	0.051	0.104
% no charge and other	0.045	0.091	0.038	0.046	0.037	0.035
% source of payment unknown	0.024	0.023	0.024	0.034	0.023	0.025
Hospital characteristics
% proprietary ownership	0.139	0.093	0.206	0.207	0.124	0.122
% government	0.098	0.075	0.058	0.050	0.104	0.141
% non-profit	0.762	0.831	0.736	0.744	0.772	0.737
% 6–99 bed	0.297	0.431	0.266	0.290	0.278	0.264
% 100–199 bed	0.270	0.301	0.275	0.387	0.268	0.293
% 200–299 bed	0.169	0.078	0.186	0.141	0.151	0.151
% 300–499 bed	0.191	0.164	0.187	0.128	0.214	0.194
% 500 plus bed	0.074	0.027	0.085	0.054	0.089	0.097
% North East	0.250	0.201	0.262	0.273	0.368	0.427
% Mid West	0.293	0.474	0.268	0.343	0.214	0.249
% South	0.345	0.241	0.380	0.327	0.305	0.245
% West	0.111	0.084	0.090	0.057	0.113	0.078
Outcomes
Length of Stay (days)	5.903	8.988	9.021	8.128	11.825	10.924
Procedure Counts	0.808	0.905	0.443	0.546	0.372	0.652

^aAll statistics are weighted and nationally representative; Sample mean in bold font indicates significant difference in means between marijuana users and non-users.