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. 2021 Apr 14;21:121. doi: 10.1186/s12890-021-01471-0

Table 3.

Fit indexes of the different models of the CFA (N = 192)

χ2 (df) p RMSEA CI of RMSEA 90% TLI CFI Δχ2(df) Δp
Model a 955.89 (223)  < .001 .13 .12–.14 .52 .57
Model b 715.44 (222)  < .001 .11 .10–.12 .67 .71 240.45 (1)  < .001
Model c 544.41 (227)  < .001 .09 .08–.10 .80 .82 171.03 (5)  < .001
Model d 362.33 (194)  < .001 .07 .06–.08 .87 .90 182.08 (33)  < .001

Model a: one-dimensional; Model b: first-order two-factor correlated; Model c: second-order hierarchical order; Model d: confirmatory bi-factor. χ2: Chi2; df: degrees of freedom; RMSEA: root mean square error of approximation; 90% CI: confidence interval of RMSEA 90, CFI: comparative fit index; TLI: Tucker-Lewis index of adjustment