. Author manuscript; available in PMC: 2011 Aug 1.

Published in final edited form as: Breast Cancer Res Treat. 2011 Mar 9;129(1):117–124. doi: 10.1007/s10549-010-1324-y

Table 1.

Number of First and Contralateral Breast Cancers by Age at Diagnosis, Type of Cancer, and Months Since First Cancer Diagnosis - SEER data (1973–2006)

Age at 1^st breast cancer diagnosis	< 50 years		≥ 50 years
Type of 1^st breast cancer	IBC	Regional/distant Non-IBC	IBC	Regional/distant Non-IBC
# 1^st breast cancers	1,884	50,323	3,747	124,311
# contralateral breast cancers	119	1,958	155	4,061
<24 months since 1^st cancer dx	75	429	83	958
24–60 months since 1^st cancer dx	32	534	47	1,154
> 60 months since 1^st cancer dx	12	995	25	1,949
# contralateral IBC	30	72	40	90
<24 months since 1^st cancer dx	20	29	28	35
24–60 months since 1^st cancer dx	8	17	11	28
> 60 months since 1^st cancer dx	2	26	1	27
# contralateral Non-IBC	89	1,886	115	3,971
<24 months since 1^st cancer dx	55	400	55	923
24–60 months since 1^st cancer dx	24	517	36	1,126
> 60 months since 1^st cancer dx	10	969	24	1,922