Table 1.
Fit Statistics for Gompertz Growth Model and Gompertz Growth Mixture Models.
| M1: Growth Model |
M2A: 2-Class GMM |
M3A: 3-Class GMM1,2,3 |
M2B: 2-Class GMM |
M3B: 3- Class GMM1,2,3 |
M2C: 2-Class GMM1,3 |
M3C: 3-Class GMM1,3 |
|
|---|---|---|---|---|---|---|---|
| Fit Statistics | |||||||
| χ 2 | 8,185 | -- | -- | -- | -- | -- | -- |
| Parameters | 17 | 21 | 25 | 27 | 37 | 34 | 51 |
| RMSEA | .147 | -- | -- | -- | -- | -- | -- |
| CFI | .896 | -- | -- | -- | -- | -- | -- |
| TLI | .879 | -- | -- | -- | -- | -- | -- |
| −2LL | 737,782 | 725,384 | 723,997 | 723,381 | 724,848 | 719,680 | 715,412 |
| AIC | 737,816 | 725,814 | 724,047 | 723,435 | 724,922 | 719,748 | 715,514 |
| BIC | 737,951 | 725,981 | 724,246 | 723,645 | 725,216 | 720,019 | 715,919 |
| ABIC | 737,897 | 725,914 | 724,167 | 723,564 | 725,098 | 719,910 | 715,757 |
| Bootstrap LRT p-value | -- | <.001 | <.001 | <.001 | <.001 | <.001 | <.001 |
| Entropy | -- | .912 | .687 | .904 | .608 | .749 | .671 |
Note: ‘--’ indicates fit statistic not available, χ2 = maximum likelihood chi-square value, Parameters = Number of estimated parameters, RMSEA = Root Mean Square Error of Approximation, CFI = Comparative Fit Index, TLI = Tucker-Lewis Index, −2LL = −2 log-likelihood, AIC = Akaike Information Criteria, BIC = Bayesian Information Criteria, ABIC = Sample size Adjusted BIC, 1latent variable covariance matrix was not positive definite, 2best log-likelihood was not replicated (from Mplus with multiple sets of starting values), 3Bootstrap LRT p-value may not be trustworthy.