Table 2.
Model fit indices for latent class growth models for girls and boys
| Model | LL | No. of free parameters | AIC | BIC | Adjusted BIC | E | Range of ACPs | VLMR-LRT |
|---|---|---|---|---|---|---|---|---|
| Girls (N= 1332) | ||||||||
| 1 class (quadratic) | −2792.3 | 11 | 5606.6 | 5663.7 | 5628.8 | -- | -- | -- |
| 2 classes (quadratic) | −2052.2 | 15 | 4134.4 | 4212.3 | 4164.6 | .974 | .842–.937 | p=.02 |
| 3 classes (quadratic)* | −1601.7 | 19 | 3241.4 | 3340.1 | 3279.8 | .959 | .954–.989 | p=.06 |
| 4 classes (quadratic)a | −1188.4 | 23 | 2422.9 | 2542.3 | 2459.3 | .964 | .925–.989 | p=.24 |
| Boys (N= 1234) | ||||||||
| 1 class (linear) | −2613.0 | 11 | 5248.0 | 5304.3 | 5269.4 | -- | -- | -- |
| 2 class (linear) | −2176.4 | 13 | 4378.8 | 4445.3 | 4404.0 | .979 | .962–.996 | p=.12 |
| 2 class (quadratic) | −2612.1 | 15 | 4354.1 | 4430.9 | 4383.2 | .972 | .945–.997 | p=.25 |
| 2 classes (cubic)* | −2081.2 | 17 | 4196.4 | 4283.4 | 4229.5 | .961 | .968–.992 | p=.02 |
| 3 class (linear) | −1931.1 | 16 | 3894.2 | 3976.1 | 3925.3 | .958 | .898–.989 | p=.60 |
| 3 classes (quadratic) | −1817.9 | 19 | 3673.7 | 3770.9 | 3710.6 | .930 | .954–.980 | p=.56 |
| 3 classes (cubic) | −1717.7 | 21 | 3477.4 | 3584.9 | 3518.1 | .956 | .947–.988 | p=.52 |
Note. LL = log likelihood, AIC = Akaike Information Criterion, BIC = Bayes Information Criterion; E = entropy, ACP = Average posterior class membership probability, VLMR-LRT = Vuong-Lo-Mendell-Rubin test
a
Best LL was not replicated after 1000 iterations
*
Final model