The Chinese version of the Perceived Stress Questionnaire: development and validation amongst medical students and workers

Table 3 CFA of factorial structure solution among different conditions for the PSQ

	Factors	Items	CMIN	DF	P	NC	TLI	CFI	WRMR	RMSEA [90% CI]
Subgroups
Medical Workers	4	30	2665.430	399	< 0.001	6.680	0.934	0.940	1.913	0.068 [0.066, 0.071]
Medicine Students^a	5	30	3476.995	395	< 0.001	8.803	0.903	0.912	2.324	0.070 [0.068, 0.073]
Medical Workers^*	2	13	543.294	64	< 0.001	8.489	0.957	0.965	1.637	0.078 [0.072, 0.084]
Medicine Students	2	13	607.965	64	< 0.001	9.499	0.950	0.959	1.792	0.073 [0.068, 0.079]
Languages
Chinese	1	13	1443.451	65	< 0.001	22.207	0.940	0.950	2.687	0.087 [0.083, 0.091]
Chinese	2	13	936.631	64	< 0.001	14.635	0.961	0.968	2.148	0.070 [0.066, 0.074]
English	7	30	11,042.264	384	< 0.001	28.756	0.836	0.855	4.027	0.100 [0.098, 0.101]
Spanish	6	30	9471.091	390	< 0.001	24.285	0.862	0.877	3.637	0.091 [0.090, 0.093]
German	4	20	5069.364	164	< 0.001	30.910	0.873	0.890	3.693	0.103 [0.101, 0.106]
Greek	5	30	8237.623	395	< 0.001	20.855	0.883	0.893	3.390	0.084 [0.083, 0.086]
Swedish	5	21	5737.159	179	< 0.001	32.051	0.855	0.877	3.776	0.105 [0.103, 0.108]
Cutoff value	N/A	N/A	N/A	N/A	> 0.05	< 2— < 3	> 0.90	> 0.90	< 1.0	< 0.05 or 0.08

Note: CMIN chi-square; DF degrees of freedom; NC normed chi-square, CMIN/DF; TLI Tucker-Lewis index; CFI comparative fit index; WRMR weighted root mean square residual; RMSEA root mean square error of approximation; N/A not applicable
*Best fitting model (in bold), ^a CFA in Medical Students was used to test a model derived using EFA in Medical Workers, extraction method: Principal Component Analysis; because of using the maximum likelihood method, there were 5 dimensions that can be obtained, one of which has only one item. Others extraction method: Maximum Likelihood
The CFA of different languages used total sample (three samples, Using the data of sample A for the first time has to be merged into the total sample.); the Swedish version (Rönnlund et al., 2015), the Greek version (Karatza et al., 2014) and the German version (Fliege et al., 2005), the Spanish version (Sanz-Carrillo et al., 2002), the English/original version (Levenstein et al., 1993)

ISSN: 1477-7525