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. 2006 Apr 6;6:49. doi: 10.1186/1472-6963-6-49

Table 2.

Frequency distributions (weighted percentages unless indicated otherwise) of socioeconomic and demographic characteristics of DC and GP patients, by country and pattern of health-care use in the past 12 months: Joint Canada/US Survey of Health, 2002–03*

United States Canada
Variable Category GP only (n = 3565) GP+DC (n = 511) DC only (n = 84) GP only (n = 2434) GP+DC (n = 397) DC only (n = 51)
Age (Years) 18–44 47.8 47.6 65.7 48.5 53.0 81.1
45–64 33.0 38.8 28.3 32.8 35.2 15.6
≥ 65 19.2 13.6 6.1 18.7 11.8 3.3
Mean (SE) 47.2 (0.3) 46.1 (0.8) 40.3 (1.4) 46.5 (0.4) 44.6 (0.8) 34.4 (2.0)
Median 45 45 38 45 43 33
Sex Male 45.1 42.2 50.5 45.5 42.7 77.2
Female 54.9 57.8 49.5 54.5 57.3 22.8
Race/ethnicity White only 68.9 81.4 73.3 80.1 86.9 85.5
Other/multiple 26.7 15.4 24.1 18.4 12.8 14.5
Education No H.S. degree 10.8 8.0 10.4 20.7 13.9 23.3
High school degree 35.4 35.1 39.6 29.2 31.5 38.4
Some college 13.9 13.0 20.0 21.7 20.0 22.1
4-year college degree 35.6 41.1 27.3 27.0 33.3 16.1
Marital status Married/with partner 61.8 66.2 64.0 64.9 70.9 60.6
Widowed 7.1 4.6 4.1 6.7 4.5 0.0
Separated/divorced 10.3 11.5 10.8 7.5 8.5 2.8
Single 16.9 14.8 18.5 19.7 15.9 36.6
Household income (adjusted for household size) Lowest quintile 14.8 10.5 15.5 18.2 11.5 11.6
Lower middle 16.3 18.4 15.8 17.0 18.2 24.2
Middle 15.1 15.7 13.7 16.6 16.2 19.5
Upper middle 14.8 18.7 15.9 16.9 20.6 16.9
Highest 14.9 18.5 16.8 15.2 22.8 13.1
Main income source Employment 69.6 76.5 82.1 71.6 79.4 82.0

* Weighted percentages may not sum to 100 because of missing data or exclusion of certain categories; percentages weighted to account for age, sex, region (Canada only), and race/ethnicity (U.S. only); 3565, 511, and 84 represent 138,802,519, 20,060,412, and 3,453,164 adults, respectively, in the U.S.; 2434, 397, and 51 represent 16,555,719, 2,723,870, and 381,147 adults, respectively, in Canada.

GP = general practitioner or family doctor; DC = Doctor of Chiropractic; SE = standard error.