Assessment of the dimensionality of the Wijma delivery expectancy/experience questionnaire using factor analysis and Rasch analysis

Table 4 Fit statistics from CFA of WDEQ items (n = 718)

Model	Chi sq	df	p	RMSEA	CFI	TLI
Single factor solution original 33 items	9332.79	495	<.001	.16	.69	.67
Four factors 27 items	2938.47	318	<.001	.11	.90	.89
Four factors 27 items correlated errors ^a: 5/4, 27/25, 14/13, 14/18	2220.83	314	<.001	.09	.93	.92

RMSEA root mean square of approximation (values < .05 indicate close fit, values between .05 and .08 indicate reasonable fit and values above .10 indicate poor fit, [44])
CFI comparative fit index (values above .95 are desirable, [45])
TLI tucker-lewis index (values above .95 are desirable, [45])
^aTo improve model fit the error terms between these pairs of items were allowed to correlate, reflecting similarity in item content

ISSN: 1471-2393