Validity of questionnaire-based assessment of sedentary behaviour and physical activity in a population-based cohort of older men; comparisons with objectively measured physical activity data

Table 1 Flow chart for men invited to accelerometer study at clinic visit

	N	%
Participants invited	3137	100
Agreed to participate	1655	52.8
Actigraph returned	1566	49.9
Actigraph missing/lost, n=53(1.7 %)
Actigraph faulty, n=6 (0.2 %)
Actigraph returned unworn, n=30 (1.0 %)
Actigraph with a valid week	1528	48.7
With a valid questionnaire	1455	46.4
Not in residential home or in a wheelchair	1455	46.4
With PA score self-reported	1377	43.9
a) and FEV₁ + Heart rate	1257	40.0
b) and sedentary behaviour score self-reported	1112	35.4

ISSN: 1479-5868