Table 2.

Measures of global fit, factor reliability and average proportion of variance for the basic CFA model and the CFA model adjusted for the variables physical activity and psychosocial distress

	Valid n	Chi2	Df	P-value	Chi2/Df	TLI	CFI	RMSEA	Factor reliability	AVE
Thresholds for model acceptance				>  0.05	<  3	≥ 0.90	≥ 0.90	≤ 0.08	>  0.60	>  0.50
Basic model
Maximum likelihood method	3225	151.40	5	<  0.001	30.28	0.96	0.98	0.095	0.87	0.58
Asymptotic distribution-free	3225	110.56	5	<  0.001	22.11	0.89	0.94	0.081	0.87	0.59
Adjusted model
Maximum likelihood method	3064	151.24	5	< 0.001	30.25	0.96	0.98	0.098	0.87	0.58
Asymptotic distribution-free	3064	109.87	5	< 0.001	21.98	0.88	0.94	0.083	0.87	0.59

CFA, confirmatory factor analysis; Df, degrees of freedom; TLI, Tucker Lewis Index; CFI, Comparative Fit Index; RMSEA, root mean square error of approximation; AVE, average proportion of variance measured; for thresholds see Schermelleh-Engel, Moosbrugger and Müller 2003; Kline 2011; Hooper, Coughlan and Mullen 2008 [22, 25, 26]