Table 1. Study population characteristics.

		Training sample n = 433	Validation sample n = 911
Sex (%women)		50.81	51.59
Age at recruitment (years)		63.53±8.55	65.74±7.99
Occupational activity (%)	Non-working	51.27	52.58
	Sedentary	32.33	31.28
	Standing	9.70	10.43
	Manual	6.24	4.39
	Heavy manual	0.46	1.32
Total Physical Activity Index (%)	Inactive	20.55	20.42
	Moderately inactive	31.18	35.78
	Moderately active	42.26	38.20
	Active	6.0	5.60
Cambridge index (%)	Inactive	8.08	9.33
	Moderately inactive	35.80	34.25
	Moderately active	28.41	28.10
	Active	27.71	28.32
Acceleration counts (counts/min/day)		30.47±17.26	29.09±13.94
PAEE (kJ/kg/day)		8.54±3.66	8.29±3.68
Sedentary time (min/day)		1070±135	1077±136
PAL		1.59±0.20	1.58±0.20