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. 2021 Dec 16;16(12):e0261271. doi: 10.1371/journal.pone.0261271

Table 1. Summary of measurement invariance analysis.

Age groups
Model χ 2 df CFI ΔCFI RMSEA ΔRMSEA SRMR ΔSRMR
Configural 157.17 108 0.994 ― 0.076 ― 0.045 ―
Metric 180.96 120 0.994 0.000 0.069 -0.007 0.048 0.003
Scalar 224.97 183 0.995 0.001 0.051 -0.018 0.051 0.003
Sexes
Model χ 2 df CFI ΔCFI RMSEA ΔRMSEA SRMR ΔSRMR
Configural 99.69 54 0.993 ― 0.072 ― 0.032 ―
Metric 121.03 62 0.991 -0.002 0.076 0.004 0.036 0.004
Scalar 147.30 79 0.989 -0.002 0.073 -0.003 0.038 0.002
Ethnicities
Model χ 2 df CFI ΔCFI RMSEA ΔRMSEA SRMR ΔSRMR
Configural 146.11 81 0.991 ― 0.088 ― 0.042 ―
Metric 162.14 97 0.991 0.000 0.081 -0.007 0.044 0.002
Scalar 191.64 131 0.992 0.001 0.067 -0.014 0.047 0.003
Samples
Model χ 2 df CFI ΔCFI RMSEA ΔRMSEA SRMR ΔSRMR
Configural 675.08 54 0.987 ― 0.094 ― 0.033 ―
Metric 681.14 62 0.987 0.000 0.088 -0.006 0.033 0.000
Scalar 711.92 79 0.987 0.000 0.079 -0.009 0.035 0.002

Notes. χ2 = chi-square; df = degrees of freedom; CFI = comparative fit index; ΔCFI = delta (change in) CFI; RMSEA = root mean square error of approximation; ΔRMSEA = delta (change in) RMSEA; SRMR = standardized root mean residual; ΔSRMR = delta (change in) SRMR.