TABLE I.
Proportion of cancers attributable to tobacco smoking, excess weight, alcohol use, and physical inactivity, Canada, 2000 and 2013
| Risk factor, by sex | 2000 | 2013 | Variance | Percentage variance | ||
|---|---|---|---|---|---|---|
| Value | 95% CI | Value | 95% CI | |||
| Women (%) | ||||||
| Tobacco smoking | 14.5 | 12.9 to 16.2 | 12.4 | 11.2 to 13.7 | −2.1 | −14.2 |
| Excess weight | 5.1 | 3.8 to 6.4 | 5.7 | 4.4 to 7.0 | 0.6 | 11.8 |
| Alcohol use | 1.8 | 1.1 to 2.6 | 2.2 | 1.4 to 3.0 | 0.4 | 20.7 |
| Physical inactivity | 6.3 | 4.9 to 7.6 | 5.3 | 4.1 to 6.4 | −1.0 | −16.2 |
| SUBTOTAL | 27.7 | 22.7 to 32.7 | 25.6 | 21.1 to 30.2 | −2.1 | −7.6 |
| Men (%) | ||||||
| Tobacco smoking | 21.1 | 19.1 to 23.2 | 17.9 | 16.0 to 20.0 | −3.2 | −15.1 |
| Excess weight | 4.1 | 3.0 to 5.3 | 4.5 | 3.3 to 5.8 | 0.4 | 9.4 |
| Alcohol use | 5.0 | 3.0 to 6.8 | 5.5 | 3.3 to 7.5 | 0.5 | 9.1 |
| Physical inactivity | 2.1 | 1.6 to 2.6 | 1.9 | 1.5 to 2.3 | −0.2 | −10.3 |
| SUBTOTAL | 32.4 | 26.7 to 38.0 | 29.8 | 24.0 to 35.6 | −2.6 | −7.9 |
| Overall (%) | ||||||
| Tobacco smoking | 17.9 | 16.1 to 19.8 | 15.2 | 13.7 to 16.9 | −2.7 | −15.1 |
| Excess weight | 4.6 | 3.4 to 5.8 | 5.1 | 3.8 to 6.4 | 0.5 | 10.9 |
| Alcohol use | 3.5 | 2.1 to 4.8 | 3.9 | 2.4 to 5.3 | 0.4 | 11.0 |
| Physical inactivity | 4.1 | 3.2 to 5.0 | 3.5 | 2.7 to 4.3 | −0.6 | −13.8 |
| TOTAL | 30.1 | 24.8 to 35.4 | 27.7 | 22.6 to 32.9 | −2.4 | −7.9 |