Table 2.

Breast-cancer incidence proportion from 1980-1990 to 1995-2005 in France

Age in the cohort	Incidence proportion of breast cancer diagnosis for 11 year periods		Incidence proportion attributable to change in risk factor exposure from 1980-1990 to 1995-2005			Relative change in adjusted incidence proportion attributable to overdiagnosis
	Cases per 1000		Cases per 1000			Adjusted relative increase
	(1)	(2)	(3)	(4)	(5)	{(2)-(1)-(3)-(4)-(5)}/(1)
	1980 - 1990	1995 - 2005	HRT	Alcohol	Obesity
50-64	20.4	36.8	.82	- .40	.48	76.0% 95% CL:66.7; 85.0
65-79	24.3	30.9	.89	- .25	.33	23.0 % 95% CL: 15.2%; 30.9%

Comparison of 11 year follow-up of age matched cohorts 15 years apart