Table 4.

Results from simulation study. Percentage bias, average of the estimated standard errors (SE), empirical standard deviation (ESD), and 95% coverage probabilities are reported for the estimated marginal regression coefficients.

	Fittedmodel: MAR				Fittedmodel: latent class
Parameter	% bias	SE	ESD	coverage	% bias	SE	ESD	coverage
	True model: MAR
Intercept	0.1	0.07	0.08	0.86	3.5	0.07	0.08	0.87
IDU	–1.1	0.12	0.14	0.91	–1.9	0.12	0.14	0.91
Visit	0.0	0.01	0.01	0.98	–3.2	0.01	0.01	0.93
	True model: latent class (M = 2)
Intercept	7.6	0.07	0.07	0.74	8.0	0.07	0.07	0.98
IDU	–0.9	0.13	0.16	0.87	–1.6	0.12	0.12	0.94
Visit	–582	0.01	0.01	0.00	–26	0.02	0.02	0.91