Table 2. Sample size adequacy measures of the physical activity questionnaire-children (PAQ-C).

Measures	Values
	Total sample (N = 327)	CFA sub-sample (n = 137)	EFA sub-sample (n = 190)
Anti-image matrix	0.75–0.89	0.65–0.88	0.73–0.89
Bartlett’s test of Sphericity	${\chi }^2$ (36) = 566.3, p < 0.001	${\chi }^2$ (36) = 281.6, p < 0.001	${\chi }^2$ (36) = 318.28, p < 0.001
Determinant	0.172	0.12	0.18
Kaiser-Meyer-Olkin Test of Sampling Adequacy (KMO)	0.84	0.82	0.83
Communality	0.30–0.58	0.22–0.59	0.37–0.59

Note:

EFA, exploratory factor analysis; CFA, confirmatory factor analysis.