Table 6. Trends in crude incidence rates for breast cancer according to joinpoint analysis (KBCS survey data, 2002–2013).
| AAPC 2002–2013 | Trend 1 | Trend 2 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Period | APC | 95% CI | Period | APC | 95% CI | ||||
| Lower | Higher | Lower | Higher | ||||||
| Invasive breast cancer | +6.7* | 2002–2010 | +8.5* | 7.3 | 9.8 | 2010–2013 | +2.0* | -1.7 | 6.0 |
| DCIS | +15.1* | 2002–2013 | +15.1* | 13.5 | 16.6 | - | - | - | - |
KBCS=Korean Breast Cancer Society; AAPC=average annual percent rate change, %; APC=annual percent rate change, %; CI=confident interval; DCIS=ductal carcinoma in situ.
*The annual percent rate change is significantly different from 0 (two-sided p<0.05).