Performance of the international physical activity questionnaire (short form) in subgroups of the Hong Kong chinese population

Table 3 Spearman correlations of IPAQ-C and ActiGraph-measured physical activity by subgroup using ActiGraph time and count data

		ActiGraph activity levels and measurements
		ActiGraph-min (moderate min)	ActiGraph-min (vigorous min)	ActiGraph-min	ActiGraph-count
Respondent characteristics\IPAQ activity level		Moderate	Vigorous	Total MET	Total MET
Sex
	Male	0.10*	0.23***	0.14***	0.18***
	Female	0.09*	0.09*	0.09*	0.15***
Age, years
	≤29	0.05	0.21***	0.06	0.04
	30-49	0.09*	0.12**	0.12**	0.19***
	≥ 50	0.12*	0.14**	0.15**	0.25***
Full-time worker
	Yes - high PD	0.19*	0.25**	0.18*	0.16
	Yes - low PD	0.10*	0.10**	0.12**	0.20***
	Not full-time	0.06	0.21***	0.07	0.08
Tertiary education
	Yes	0.03	0.17**	0.09	0.08
	No	0.11***	0.17***	0.12***	0.18***
BMI
	Overweight (≥ 25)	0.10	0.22***	0.14**	0.21***
	Normal (< 25)	0.09**	0.14***	0.10**	0.14***
VFL, %
	Overweight (≥ 10)	0.18***	0.23***	0.24***	0.31***
	Normal (< 10)	0.08*	0.10**	0.09*	0.14***

ActiGraph-min: time spent in moderate-to-vigorous physical activity (2 × minutes spent in vigorous activity + minutes spent in moderate-intensity activity, ActiGraph-count: raw counts in hours with any movement recorded, MET: metabolic equivalent task per week (8*vigorous min + 4*moderate min + 3.3*walking min), PD: physical demand
* P < 0.05.
** P < 0.01.
*** P < 0.001.