Table 5.
Test for invariance across gender and age of model 2 (two-factor model with correlated factors).
| N | χ 2 (df) | Δ χ 2 | Δ df | Δ p | CMIN/DF | CFI | Δ CFI | RMSEA | Δ RMSEA | |
|---|---|---|---|---|---|---|---|---|---|---|
| Gender | ||||||||||
| Men | 4,611 | 47.542 (8) | 5.943 | .991 | .033 | |||||
| Women | 5,057 | 124.997 (8) | 15.625 | .978 | .054 | |||||
| Multigroup analysis | ||||||||||
| Dimensional/configural | 172.538 (16) | 10.784 | .984 | .032 | ||||||
| Metric | 191.848 (22) | 19.310 | 6 | .004 | 8.720 | .983 | .001 | .028 | .004 | |
| Scalar | 393.776 (28) | 201.927 | 6 | <.001 | 14.063 | .962 | .021 | .037 | .009 | |
| Partial scalar1 | 262.914 (27) | 71.066 | 5 | <.001 | 9.738 | .976 | .007 | .030 | .002 | |
| Age group | ||||||||||
| 18-39 years | 512 | 30.288 (8) | 3.786 | .968 | .074 | |||||
| 40-49 years | 2,643 | 41.020 (8) | 5.127 | .990 | .040 | |||||
| 50-59 years | 2,255 | 47.165 (8) | 5.896 | .985 | .047 | |||||
| 60-69 years | 2,444 | 62.924 (8) | 7.866 | .975 | .053 | |||||
| ≥70 years | 1,814 | 75.471 (8) | 9.434 | .956 | .068 | |||||
| Multigroup analysis | ||||||||||
| Dimensional/configural | 256.899 (40) | 6.422 | .978 | .024 | ||||||
| Metric | 316.016 (64) | 59.117 | 24 | <.001 | 4.938 | .975 | .003 | .020 | .004 | |
| Scalar | 572.700 (88) | 256.684 | 24 | <.001 | 6.508 | .952 | .023 | .024 | .004 | |
| Partial scalar2 | 357.280 (80) | 41.264 | 16 | .001 | 4.466 | .973 | .002 | .019 | .001 | |
Note. df: degrees of freedom, CMIN/DF: minimum discrepancy, divided by its degrees of freedom, CFI: comparative fit index, RMSEA: root mean square error of approximation, 1 constraint of equal intercepts freed for item 6, 2 constraint of equal intercepts freed for items 5 and 6.