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

Table 2 Comparisons of IPAQ-C and ActiGraph for three categories of physical activity.

	Moderate activity Minutes per day	Vigorous activity Minutes per day	Total MET Per week
IPAQ-C, mean(SD)	146.2 (164.8)	13.2 (46.1)	4250.6 (5053.9)
ActiGraph, mean(SD)	43.6 (23.9)	1.2 (3.1)	1284.3 (728.1)
IPAQ-C vs ActiGraph, difference (SE)	102.6*** (4.6)	12.0*** (1.3)	2966.3*** (140.1)
IPAQ-C vs ActiGraph -min, Spearman ρ correlation (SE)	0.09** (0.03)	0.16*** (0.03)	0.11*** (0.03)
IPAQ-C vs ActiGraph-count, Spearman ρ correlation (SE)	0.14*** (0.03)	0.06* (0.03)	0.16*** (0.03)

MET: metabolic equivalent task per week (ActiGraph: 8*vigorous min + 4*moderate min, IPAQ: 8*vigorous min + 4*moderate min + 3.3*walking min)
* P < 0.05.
** P < 0.01.
*** P < 0.001.

ISSN: 1479-5868