Evaluate construct validity of the Revised American Pain Society Patient Outcome Questionnaire in gynecological postoperative patients using confirmatory factor analysis

Table 2 Fit indices for maximum likelihood confirmatory factor analyses between models

Model	Model description	RMSEA (90% CI)	CFI	TFI	df	χ²	χ²/df	P
Model I	One-factor model	0.146 (0.138, 0.155)	0.575	0.462	135	1005.34	7.45
Model II	Five-factor model	0.070 (0.060, 0.080)	0.911	0.878	125	308.31	2.47	< 0.05
Model III	Four-factor model	0.068 (0.058, 0.079)	0.922	0.895	113	271.60	2.40	< 0.05
Model IV	Three-factor model	0.122 (0.113, 0.131)	0.711	0.626	132	723.66	5.482	< 0.05

Abbreviations: RMSEA Root-mean-square error of approximation, CI Confidence interval, CFI Comparative fit index, TFI Tucker-Lewis Index, df Degrees of freedom, χ² Chi-square

ISSN: 1471-2253