Table 1.

Fit Indices for One‐ to Four‐Class Solutions for Veterans' Five Dimensions of Posttraumatic Growth (PTG)

Measure and Number of Classes	AIC	BIC	aBIC	Entropy	LMR LRT	BLRT
Improved Relationships
1	1,347.980	1,376.022	1,350.663	–	–	–
2	1,346.821	1,385.380	1,350.510	0.588	6.750	6.750*
3	1,312.009	1,361.083	1,316.704	0.705	18.277	18.277***
4	1,318.009	1,377.599	1,323.710	0.766	18.277	18.277*
New Possibilities
1	1,424.869	1,452.912	1,427.552	–	–	–
2	1,403.757	1,442.316	1,407.446	0.663	27.112 **	27.112 ***
3	1,400.929	1,450.003	1,405.624	0.706	8.829	8.829
4	1,406.929	1,466.519	1,412.630	0.767	0.000	0.000
Personal Strength (linear only)
1	1,537.162	1,565.205	1,539.845	–	–	–
2	1,520.352	1,558.910	1,524.041	0.638	22.811*	22.811***
3	1,502.664	1,551.739	1,507.360	0.740	23.687*	23.687***
4	1,508.664	1,568.255	1,514.366	0.794	6.487	6.487
Personal Strength (linear and quadratic)
1	1,492.89	1,515.20	1,501.31	0.66	41.15*	44.02**
2	1,375.54	1,431.56	1,380.84	0.75	42.16 *	44.08 ***
3	1,368.39	1,438.42	1,375.02	0.73	14.49	15.15*
4	1,375.54	1,431.56	1,380.84	0.75	13.64	14.25*
Spiritual Change (linear only)
1	–	–	–	–	–	–
2	1,512.298	1,550.856	1,515.987	0.713	43.266*	43.266***
3	1,514.401	1,563.476	1,519.097	0.815	3.896	3.896
4	1,524.298	1,583.888	1,529.999	0.856	44.447	44.447
Spiritual Change (linear and quadratic)
1	–	–	–	–	–	–
2	1,489.03	1,545.05	1,494.33	0.801	54.93	57.42
3	1,426.79	1,496.82	1,433.42	0.860	67.18	70.23 ***
4	1,434.79	1,518.82	1,442.74	0.640	68.46	70.23***
Appreciation of Life
1	1,604.691	1,632.734	1,607.374	–	–	–
2	1,579.052	1,617.611	1,582.741	0.712	31.639***	31.639***
3	1,564.858	1,613.932	1,569.553	0.747	20.195 *	20.195 ***
4	1,570.858	1,630.448	1,576.559	0.799	−2.379	−2.379

Note. Optimal solutions are marked in bold. AIC = Akaike information criterion; BIC = Bayesian information criterion; aBIC = adjusted BIC; LMR LRT = Lo–Mendell–Rubin likelihood ratio test; BLRT = bootstrap likelihood ratio test.

^* p < .05. ^** p < .01. ^*** p < .001.