Table 3. Spearman correlation coefficients between IPAQ (short version, usual week) and accelerometer-based measures.

	TPA-AC (MET·min·wk−1)				Daily step count (steps day−1)				METs 3.0+ (min·day−1)
	Young old		Old old		Young old		Old old		Young old		Old old
	Men (n = 76)	Women (n = 84)	Men (n = 77)	Women (n = 69)	Men (n = 76)	Women (n = 84)	Men (n = 77)	Women (n = 69)	Men (n = 76)	Women (n = 84)	Men (n = 77)	Women (n = 69)
Vigorous (min·wk−1)	0.25*	0.12	0.17	0.17	0.26*	0.10	0.21	0.17	0.20	0.08	0.11	0.14
Moderate (min·wk−1)	0.26*	0.13	0.05	0.03	0.28*	0.13	0.08	0.04	0.20	0.06	0.05	−0.03
Walking (min·wk−1)	0.31**	0.49**	0.63**	0.56**	0.30**	0.48**	0.59**	0.55**	0.34**	0.46**	0.65**	0.51**
Total IPAQ
Original IPAQ ​ (MET·min·wk−1)	0.42**	0.49**	0.53**	0.49**	0.44**	0.47**	0.55**	0.49**	0.37**	0.43**	0.47**	0.40**
Modified IPAQ ​ (MET·min·wk−1)	0.43**	0.49**	0.54**	0.49**	0.44**	0.48**	0.56**	0.49**	0.38**	0.44**	0.49**	0.40**

*P < 0.05, **P < 0.01. TPA-AC: Total physical activity measured by accelerometer. METs 3.0+: Duration of physical activity ≥3.0METs.

Participants who reported swimming and long cycling/upper-body exercise during accelerometer measurement were excluded from this analysis.