Table 1 Socio-demographic and outcome characteristics
Variables | Australia | Canada | New Zealand | United States |
|---|---|---|---|---|
National Survey of Adult Oral Health | Canadian Health Measures Surveya | New Zealand Oral Health Survey | National Health and Nutrition Examination Survey | |
2004–2006 | 2007–2009 | 2009 | 2003–2004 | |
N = 5,073 | N = 3,278 | N = 2,041 | N = 4,568 | |
N (%)b | N (%)b | N (%)b | N (%)b | |
Gender | ||||
 Male | 2,016 (49.8) | (49.1) | 793 (48.2) | 2,200 (48.0) |
 Female | 3,057 (50.2) | (50.9) | 1,248 (51.9) | 2,368 (52.0) |
Education | ||||
 Primary | 1,196 (22.8) | (12.8) | 467 (19.8) | 1,366 (18.6) |
 Secondary | 478 (10.9) | (17.6) | 307 (16.4) | 1,134 (26.9) |
 Post-Secondary | 1,521 (32.0) | (42.1) | 800 (40.0) | 1,189 (30.4) |
 Tertiary | 1,634 (34.4) | (27.5) | 444 (23.3) | 865 (24.2) |
Income | ||||
 Low | 2,189 (37.4) | (6.3) | 776 (24.7) | 2,075 (36.1) |
 Medium | 1,590 (35.0) | (36.0) | 592 (29.0) | 1,157 (30.2) |
 High | 1,069 (27.6) | (57.7) | 728 (46.4) | 1,060 (33.8) |
Mean age (years) | 49.5 ± 14.7 | 47.9 ± 12.4 | 48.9 ± 13.0 | 48.9 ± 13.0 |