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. 2021 Jul 6;19:176. doi: 10.1186/s12955-021-01803-y

Table 4.

Fit statistics for the Chinese version of the PSQI

Factor model x2/df CFI RMSEA
1-factor model 10.36 0.62 0.15
2-factor model 7.21 0.78 0.12
3-factor model 3.12 0.94 0.08

x2/df, Relative chi-square; CFI, Comparative fix index; RMSEA, Root Mean Square Error of Approximation

Confirmatory factor analysis (CFA) was carried out using AMOS version 25.0 for Windows. Acceptable overall fit of each model was evaluated using the following indices:

Criterion Range
x2/df 1.00–5.00
CFI 0.9 or higher
RMSEA 0.08 or less