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. Author manuscript; available in PMC: 2013 Sep 26.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2011 Aug 30;20(10):2120–2126. doi: 10.1158/1055-9965.EPI-11-0348

Table 3.

Overall and adjusted HRs for CVD according to RT at baseline and stratified by laterality

RT and laterality Total, n With CVD, n Woman-years Crude rates
(per 1,000
woman-years)		 Crude HR
(95% CI)		 Adjusted
HRa (95% CI)		 Adjusted
HRb (95% CI)
Radiation yes,
left side vs.		 443 88 1,441 61.07 0.86 (0.65–1.14) 0.97 (0.72–1.31) 1.00 (0.75–1.35)
Radiation no,
left side		 125 1,564 79.92 1.00 (ref) ref
Radiation yes,
right side vs.		 363 48 1,094 43.88 0.63 (0.45–0.88) 0.73 (0.52–1.05) 0.75 (0.53–1.06)
Radiation no,
right side		 120 1,542 77.82 1.00 (ref) ref
Radiation yes,
left side vs.		 340 88 1,441 61.07 1.42 (0.99–2.03) 1.54 (1.07–2.23) 1.53 (1.06–2.21)
Radiation yes,
right side		 48 1,094 43.88 1.00 (ref) ref
Radiation no,
left side vs.		 466 125 1,564 79.92 1.03 (0.80–1.32) 1.17 (0.91–1.51) 1.14 (0.88–1.47)
Radiation no,
right side		 120 1,542 77.82 1.00 (ref) ref
a

Fully adjusted model includes age, year, and stage of breast cancer diagnosis, race, ER/PR status, health plan, diabetes, and hypertension.

b

Parsimonious model is adjusted for the same variables excluding year of diagnosis, health plan, and breast cancer stage at diagnosis.