. Author manuscript; available in PMC: 2015 Jun 1.

Published in final edited form as: Ann Behav Med. 2014 Jun;47(3):292–302. doi: 10.1007/s12160-013-9550-2

Table 3.

Parameter estimates for growth mixture models

Parameter estimates		Class 1 n = 39 (27%)	Class 2 n = 70 (48%)	Class 3 n = 38 (26%)
Parameter estimates		Mean (SE)	Mean (SE)	Mean (SE)
Fixed
	Intercept (SE)	20.24 (1.23)^***	13.29 (2.34)^***	4.69 (.57)^***
	95% CI	18.21 – 22.27	9.45 – 17.14	3.75 – 5.63
	Slope (SE)	−.27 (.43)	−.67 (.17)^***	−.26 (.08)^***
	95% CI	−.98 - .44	−.95 - −.39	−.39 - −.13
Variance Components
	Intercept (SE)	26.82 (8.27)^**	17.30 (16.92)	4.56 (2.06)*
	Slope (SE)	0^a	.23 (.10)*	.04 (.03)
	Covariance	0^a	−1.80 (1.07)	−.39 (.22)

Note: SE = standard error;

Parameter fixed at zero;

p < .05

^**

p < .01

^***

p < .001