Table 2

Adequate physical activity (PA) among Canadian adults by stages in participant recruitment, 1995-2007

n

1995-1998

% (CI*)

1999-2002

% (CI*)

2007

% (CI*)

Number of calls made to reach the someone in the household

1 to 2

10,394

35.5

(33.4-37.7)

38.3

(36.6-40.1)

41.6

(33.2-50.6)

3 to 4

6182

34.4

(31.8-37.2)

38.2

(36.0-40.6)

32.9

(26.1-40.4)

5 to 9

6493

35.9

(32.1-39.9)

42.9

(39.6-46.3)

43.4

(36.7-50.2)

10 or more

3427

35.4

(31.9-39.0)

40.1

(37.0-43.2)

39.1

(31.7-47.0)

Number of calls answered by someone in the household

1

10 372

36.9

(34.8-39.1)

40.6

(38.9-42.3)

29.7

(19.3-42.8)

2

6114

33.9

(31.1-36.7)

38.0

(35.8-40.3)

44.0

(37.3-51.1)

3 or more

10 010

34.8

(32.8-36.9)

39.8

(37.9-41.7)

37.6

(33.0-42.4)

Number of contacts with the selected respondent

1

19 570

36.0

(34.5-37.6)

40.5

(39.2-41.7)

40.7

(32.9-49.0)

2

4186

35.6

(32.3-39.1)

37.0

(34.0-40.2)

37.9

(33.3-42.8)

3 or more

2740

30.8

(27.2-34.5)

36.4

(32.9-40.0)

40.8

(31.6-50.7)

Final completion status

Agreed to participate during 1st contact

23813

35.8

(34.4-37.2)

40.1

(39.0-41.3)

39.2

(34.9-43.7)

Initial refusal; converted to completion by senior interviewer

2683

31.7

(28.0-35.7)

35.7

(32.4-39.2)

39.6

(32.2-46.5)

* 95% Confidence Intervals with Holm adjustments for multiple comparisons

Craig et al. BMC Public Health 2009 9:425   doi:10.1186/1471-2458-9-425