Table 1.

Study characteristics and breast cancer incidence risk by race and age groups

All ages combined	SLE cohort (N = 18,423)				Control cohort (N = 3,651,715)
	Cases	Total	Unadjusted incidence [95 % CI]	Age-adjusted incidence [95 % CI]	Cases	Total	Unadjusted incidence [95 % CI]	Age-adjusted incidence [95 % CI]
All	416	18,423	2.26 [2.05–2.48]	2.23 [1.94–2.55]a	94,572	3,651,715	2.59 [2.57–2.61]	2.14 [1.95–2.34]a
Caucasians	315	13,231	2.38 [2.13–2.66]	2.41 [2.16–2.69]	82,062	3,058,316	2.68 [2.66–2.70]	2.54 [2.52–2.56]
African Americans	68	3839	1.77 [1.38–2.24]	1.97 [1.55–2.50]	8740	370,533	2.36 [2.31–2.41]	2.18 [2.13–2.24]
Others	33	1353	2.44 [1.68–3.41]	2.44 [1.71–3.47]	3770	222,866	1.69 [1.64–1.75]	1.60 [1.46–1.75]
Age ≥65 years
All	264	9795	2.70 [2.38–3.04]	2.54 [2.14–3.01]a	84,629	3,101,399	2.73 [2.71–2.75]	2.54 [2.28–2.83]a
Caucasians	215	8079	2.66 [2.32–3.04]	2.49 [2.18–2.84]	74,763	2,654,412	2.82 [2.80–2.84]	2.75 [2.73–2.77]
African Americans	27	1140	2.37 [1.57–3.43]	2.18 [1.50–3.18]	6686	261,264	2.56 [2.50–2.62]	2.51 [2.45–2.57]
Others	22	576	3.82 [2.41–5.73]	3.58 [2.33–5.51]	3180	185,723	1.71 [1.65–1.77]	1.69 [1.54–1.86]
Age <65 years
All	152	8628	1.76 [1.49–2.06]	1.60 [1.35–1.90]a	9943	550,316	1.81 [1.77–1.84]	1.55 [1.47–1.64]a
Caucasians	100	5152	1.94 [1.58–2.36]	1.60 [1.31–1.95]	7299	403,904	1.81 [1.77–1.85]	1.50 [1.45–1.55]
African Americans	41	2699	1.52 [1.09–2.06]	1.46 [1.08–1.99]	2054	109,269	1.88 [1.80–1.96]	1.58 [1.50–1.67]
Others	11	777	1.42 [0.71–2.52]	1.12 [0.60–2.08]	590	37,143	1.59 [1.46–1.72]	1.15 [0.93–1.41]

^aRace adjusted