Table 1.

Fit statistics and entropy for a latent class analysis of 8 substances used in the past month, controlling for age and education, among 549 users of cocaine and heroin in the past 6 months.

Classes	LLa	parameters	LMRb	BLRTc	s.c. r.f. (f)d	Entropy
1	−3482.92	12	NAe	NAe	NAe	NAe
2	−2447.87	19	p < .001	p < 0.001	.48 (266.0)	0.779
3	−2396.44	30	p=.013	p < 0.001	.22 (120.3)	0.742
4	−2369.49	41	p = .021	p < 0.001	.10 (55.5)	0.759
5	−2347.95	52	p<.0500	p < 0.001	.10 (54.8)	0.769
6	−2328.51	63	p=0.204	p<.0001	.09 (51.4)	0.779

^aLog Likelihood;

^bLo-Mendell-Rubin adjusted likelihood ratio test;

^cparametric Bootstrap Likelihood Ratio Test;

^dsmallest class relative frequency (frequency);

^eNot Applicable

Ideal number of classes based on fit statistic shown in bold