Measuring health-related quality of life in chronic otitis media in a Chinese population: cultural adaption and validation of the Zurich Chronic Middle Ear Inventory (ZCMEI-21-Chn)

Table 4 Fit indices of the hypothesized and the modified models

	Models	χ²	Δf	RMSEA	NNFI (TLI)	CFI	AIC	AIC Saturated	BIC
Hypothesized	Bifactor model	270.83*	168	0.05	0.94	0.94	394.25	− 1098.42	637.89
Hypothesized	Second-order model	376.02*	185	0.07	0.87	0.88	468.02	− 1099.06	621.55
Modified	Bifactor model	237.25*	150	0.05	0.96	0.95	348.26	− 992.34	581.90
Modified	Second-order model	338.93*	181	0.07	0.89	0.88	426.92	− 1071.04	573.78

χ² chi-square; Δf degree of freedom; RMSEA Root Mean Square Error of Approximation; NNFI Non-Normed Fit Index, also known as TLI Tuker-Lewise Index; CFI Comparative Fit Index; AIC Akaike Information Criteria; BIC Bayesian Information Criterion
*: p < 0.001

ISSN: 1477-7525