TABLE 1

FROM:

Recent increase of breast cancer incidence among women under the age of forty

C Bouchardy, G Fioretta, H M Verkooijen, G Vlastos, P Schaefer, J-F Delaloye, I Neyroud-Caspar, S Balmer Majno, Y Wespi, M Forni, P Chappuis, A-P Sappino and E Rapiti

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.