Table 3

Comparison of person characteristics between respondents and non-respondents

Respondents

Non-respondents

Difference


2005

Age (mean; SD)

49.5 (16.5)

43.5 (16.2)

F = 1035.92***

Sex (% male)

52

61

χ2 = 240.44***

2006

Age (mean; SD)

50.7 (16.6)

44.0 (16.8)

F = 824.35***

Sex (% male)

47

55

χ2 = 107.78***

2007

Age (mean; SD)

51.8 (16.9)

45.0 (17.0)

F = 883.50***

Sex (% male)

44

53

χ2 = 165.72***

2008

Age (mean; SD)

49.1 (18.0)

47.0 (16.7)

F = 72.76***

Sex (% male)

51

50

χ2 < 1, ns


Note. *** p < .001.

Hendriks et al. BMC Health Services Research 2009 9:167   doi:10.1186/1472-6963-9-167

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