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. 2022 Jan 17;9(1):e34103. doi: 10.2196/34103

Table 7.

Measurement invariance by gender.

Invariance model Constraints dfa χ2 CFIb BICc SRMRd RMSEAe TLIf
Configural Factor structure 584 1796 .936 235 .051 .065 .929
Weak/metricg Structure and loadings 609 (+25) 1819 (+23) .936 (–.000) 86 (–149) .053 (+.002) .064 (–.001) .932 (+.003)
Strong/scalarg Structure, loadings, and item intercepts 627 (+18) 1857 (+38) .935 (–.001) 0 (–86) .054 (+.001) .063 (–.000) .933 (+.001)

adf: degrees of freedom.

bCFI: comparative fit index.

cBIC: Bayesian information criterion.

dSRMR: standardized root mean square residual.

eRMSEA: root mean square error of approximation.

fTLI: Tucker-Lewis index.

gValues in parentheses provide the comparisons with the less-constrained models reported in the previous row, shown as the difference between the values.