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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Soc Sci Med. 2011 Mar 8;72(8):1400–1408. doi: 10.1016/j.socscimed.2011.02.022

Table 2.

Fit Indices for One- to Five-Class Growth Mixture Models (Unconditional) using PTSD symptoms

Growth Mixture Model
1 2 3 4 5
Fit Indices Class Classes Classes Classes Classes
AIC 20951.96 20587.31 20531.81 20529.02 20524.01
BIC 20977.39 20627.99 20587.38 20600.22 20615.55
SSBIC 20961.51 20602.58 20552.44 20555.75 20558.38
Entropy -- .55 .49 .54 .54
LRT p value -- <.001 <.001 <.05 .46
BLRT p value -- <.001 <.001 <.05 .45

Note. AIC = Akaike information criterion; BIC = Bayesian information criterion; SSBIC = sample size adjusted Bayesian information criterion; LRT = Lo-Mendell-Rubin test; BLRT = bootstrap likelihood ratio test.