Psychometric properties of the Chinese version of the Quick Delay Questionnaire (C-QDQ) and ecological characteristics of reward-delay impulsivity of adults with ADHD

Table 2 Model fit indices of the CFA before and after modification

Models	χ2/df	RMSEA	SRMR	CFI	IFI	TLI
before modification	6.131	0.131	0.060	0.887	0.888	0.851
after modification	2.741	0.076	0.040	0.965	0.965	0.949

Note: CFA = Confirmatory factor analysis; χ2/df: ratio of chi-square and degrees of freedom; RMSEA: root mean square error of approximation; SRMR: standardized root mean square residual; CFI: Comparative fit index; IFI: Incremental fit index; TLI: Tucker-Lewis index

ISSN: 1471-244X