Measurement invariance across gender and age groups, validity and reliability of the Chinese version of the short-form supportive care needs survey questionnaire (SCNS-SF34)

Table 3 Measurement invariance of the SCNS-34

Chi-square value of model fit		DF	p-value	CFI^d	TLI^d	RMSEA^d	90% CI
Baseline model	1762.722	517	< 0.001	0.952	0.947	0.047	0.044, 0.049
Measurement invariance across gender
Model 1 ^a	2240.351	1049	< 0.001	0.950	0.946	0.045	0.043, 0.048
Model 2 ^b	2246.337	1160	< 0.001	0.954	0.956	0.041	0.039, 0.044
Chi-Square difference test for measurement invariance across gender
	Chi-square value	DF	p-value^c
	120.256	111	0.2581
Measurement invariance across age groups
	Chi-square value of model fit	DF	p-value	CFI	TLI	RMSEA	90% CI
Model 1 ^a	2172.758	1049	< 0.001	0.948	0.944	0.045	0.042, 0.048
Model 2 ^b	2226.458	1160	< 0.001	0.953	0.954	0.041	0.038, 0.043
Chi-Square difference test for measurement invariance across age groups
	Chi-square value	DF	p-value^c
	113.049	111	0.4280

Note: ^aModel 1: it was the least constrained model. Thresholds and factor loadings were free across groups. Residual variances were fixed at one in all groups and factor means were fixed at zero in all groups. ^bModel 2: it was the more constrained model. Thresholds and factor loadings were constrained to be equal across groups. As default, residual variances were fixed at one in the first group and freely estimated in the second group. Factor means were fixed at zero in the first group and freely estimated in the second group. ^c: the chi-square difference value is not significant. It indicated that constraining the parameters of the nested model did not significantly worsen the fit of the model. Our result indicted measurement invariance. ^d: Criteria for an acceptable fit were a root mean square error of approximation (RMSEA) of < 0.06, and a comparative fit index (CFI) and Tucker-Lewis index (TLI) of ≥0.90
Abbreviation: DF Degree of freedom, CFI Comparative fit index, TLI Tucker-Lewis Index, SRMR Standardised root mean square residual, RMSEA Root mean square error of approximation, CI Confidence interval

ISSN: 1477-7525