Table 1.

Breast cancer prevalence rates from Cochran et al.[16]

	LB women			NHANES III*
Age	No	% prevalence	95% CI	% prevalence	95% CI
Under 40	7962	0.2	0.1-0.4	0.2	0.0-0.4
40-49	2671	1.5	0.1-2.5	1.0	0.4-1.9
50-59	739	3.6	2.5-5.3	3.6	0.1-7.0
60-75	182	8.8	5.4-13.9	10.0	3.0-16.9
Combined	11,554	0.9	0.8-1.1	0.9	0.4-1.3

*Standardised by age, ethnicity, education level, geographic region.