Table 5

Comparison of respondents and non-respondents on demographic characteristics

Colon cancer

Prostate cancer

Breast cancer

Total


Responded?

No

Yes

No

Yes

No

Yes

No

Yes


Age

(median, SD)

73

(SD = 14)

70.5 (SD = 12)

67

(SD = 10)

68

(SD = 9)

64

(SD = 16)

60

(SD = 13)

70 (SD = 14)

66 (SD = 12)**

Gender

(% Female)

51%

53%

NA

NA

NA

Stage 4

16%

13.5%

7%

2%*

10%

2.3%*

11.5%

5%

Race

(% white)

94%

95%

84%

93%*

89%

94%

90%

94%

Marital status

(% married)

45%

68%***

70%

85%**

47%

62%*

53%

72%


aNon-missing n = 1150.

bSignificance testing for age was conducted using non-parametric tests of medians. For all other variables, significance testing was conducted using Chi square analyses. *Represent significant differences between respondents and non-respondents on a particular demographic variable. *p < .05; **p < .01; ***p < .001

Kelly et al. BMC Medical Research Methodology 2010 10:65   doi:10.1186/1471-2288-10-65

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