Model

χ²

df

χ²/df

Δ χ²(df)

CFI

ΔCFI

RMSEA

ΔRMSEA

AIC

1-factor

84.480

27

3.129

Ref

0.914

Ref

0.104

Ref

138.480

2-factor (EFA-derived)

79.225

26

3.047

5.255 (1)

0.920

0.006

0.102

0.002

135.225

somatic-non-somatic model

41.669

26

1.603

42.811 (1)***

0.977

0.057

0.055

0.047

97.669

bifactor

18.532

18

1.030

23.137 (8)**

0.999

0.028

0.012

0.043

90.532