TABLE 3.
Model Fit Statistics From the Multiple-Group Latent Growth Models of Depressive Symptoms
| Models | χ2 | df | P | RMSEA (95% CI) | CFI | TLI | χ2 Difference Test P |
|---|---|---|---|---|---|---|---|
| Unconditional and conditional models | |||||||
| 1. Unconditional with intercept and slope | 47.679 | 20 | .001 | 0.034 (0.022–0.047) | 0.962 | 0.962 | — |
| 2. Unconditional with intercept, slope, and quadratic | 29.522 | 12 | .003 | 0.035 (0.019–0.051) | 0.976 | 0.960 | — |
| 3a. Conditional with sexual minority status freed | 61.012 | 26 | <.001 | 0.034 (0.023–0.045) | 0.957 | 0.950 | — |
| 3b. Conditional with sexual minority status fixed | 57.923 | 28 | .001 | 0.030 (0.019–0.041) | 0.963 | 0.961 | .829 |
| 4. Sexual minority status with covariates fixed | 106.546 | 60 | <.001 | 0.025 (0.017–0.033) | 0.954 | 0.946 | — |
| Single-mediator models | |||||||
| 5a. Family satisfaction: free both paths | 94.950 | 76 | .070 | 0.014 (0.000–0.023) | 0.978 | 0.974 | — |
| 5b. Family satisfaction: fix both paths | 93.666 | 78 | .109 | 0.013 (0.000–0.022) | 0.982 | 0.979 | .854 |
| 6a. Peer support: free both paths | 91.931 | 76 | .103 | 0.013 (0.000–0.022) | 0.977 | 0.973 | — |
| 6b. Peer support: fix both paths | 92.562 | 78 | .125 | 0.012 (0.000–0.021) | 0.979 | 0.976 | .494 |
| 7a. Cyberbullying victimization: free both paths | 97.828 | 76 | .047 | 0.015 (0.002–0.024) | 0.972 | 0.967 | — |
| 7b. Cyberbullying victimization: fix both paths | 103.607 | 78 | .028 | 0.017 (0.006–0.025) | 0.967 | 0.962 | .040 |
| 7c. Cyberbullying victimization: fix path “a” only | 99.177 | 77 | .045 | 0.016 (0.002–0.024) | 0.971 | 0.967 | .194 |
| 7d. Cyberbullying victimization: fix path “b” only | 101.441 | 77 | .033 | 0.016 (0.005–0.024) | 0.968 | 0.963 | .035 |
| 8a. Unmet medical needs: free both paths | 87.823 | 76 | .167 | 0.011 (0.000–0.021) | 0.984 | 0.981 | — |
| 8b. Unmet medical needs: fix both paths | 87.992 | 78 | .206 | 0.010 (0.000–0.020) | 0.986 | 0.984 | .539 |
| Final multiple-mediator model | |||||||
| 9. Full model with significant mediators | 137.583 | 116 | .084 | 0.012 (0.000–0.020) | 0.975 | 0.970 | — |
Sex differences in the direct and indirect mediation paths were tested by using χ2 difference tests within a multiple-group analysis framework. "Free" refers to the specified parameters beingfreed across groups. "Fix" refers to the specified parameters being fixed across groups. Mediation paths “a” (predictor to mediator) and “b” (mediator to outcome) in models 5–8 are referred to as "both paths." Nonsignificant χ2 difference tests revealed no significant variation by sex. Because the omnibus χ2 difference test in model 7b was significant, models 7c and 7d were estimated to test whether only 1 or both mediation paths differed across sex. The regression path from cyberbullying victimization to depressive symptoms (model 7d) was more pronounced among male than female participants. CFI, comparative fit index; df, degrees of freedom; RMSEA, root mean square error of approximation; TLI, Tucker-Lewis index; —, not applicable.