Table 1. Mean annual increase of breast cancer incidence rates by age group for the whole study period and for the last 3-year period and P-value for trend tests.
|
Incidence rates per 100 000
|
Trend test for the whole study period 1995–2004a
|
Trend test for the last 3-year period of the study 2002–2004b
|
||||||
|---|---|---|---|---|---|---|---|---|
| Age | 1995 | 2004 | Mean annual increase (95% CI) | P -value | Mean annual increase (95% CI) | P-value | ||
| 25–39 | 19.7 | 53.9 | +8.7 | (2.8–15.0) | 0.003 | +46.7 | (7.1–100.8) | 0.015 |
| 40–49 | 187.3 | 198.8 | −0.6 | (−2.8–3.4) | 0.700 | +5.4 | (−11.6–27.7) | 0.555 |
| 50–69 | 312.4 | 400.2 | +2.6 | (1.0–4.2) | 0.001 | −1.7 | (−11.7–8.3) | 0.737 |
| 70–79 | 332.6 | 383.5 | −0.4 | (−2.3–3.3) | 0.756 | +11.0 | (−7.1–32.6) | 0.247 |
| ⩾80 | 330.7 | 381.4 | +0.9 | (−2.5–4.5) | 0.590 | +3.1 | (−16.9–27.8) | 0.781 |
CI=confidence interval.
a
Poisson regression testing trends of annual incidence rates during the period 1995–2004.
b
Poisson regression testing trends of annual incidence rates during the period 2002–2004.