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Table 1 Characteristics of the study population

From: Long-term risk of ischemic heart disease after adjuvant radiotherapy in breast cancer: results from a large population-based cohort

 BC all, n (%)BC right, n (%)BC left, n (%)Women without BC, n (%)
No. of women60,21728,90330,840300,791
FU time, yrs (SD)8.1 (5.5)8.1 (5.5)8.1 (5.5)9.0 (5.6)
Health care region
 Stockholm25,606 (42.5)12,448 (43.1)13,158 (42.7)127,937 (42.5)
 Uppsala/Örebro25,323 (42.1)11,919 (41.2)12,934 (41.9)126,490 (42.1)
 Northern region9288 (15.4)4536 (15.7)4748 (15.4)46,364 (15.4)
Year of inclusion
 1992–199714,149 (23.5)6578 (22.8)7103 (23.0)70,666 (23.5)
 1998–200214,285 (23.7)6960 (24.1)7320 (23.7)71,362 (23.7)
 2003–200714,960 (24.8)7210 (24.9)7749 (25.1)74,740 (24.8)
 2008–201216,823 (27.9)8155 (28.2)8668 (28.1)84,023 (27.9)
Age at inclusion
 < 45 yrs5770 (9.6)2792 (9.7)2935 (9.5)28,826 (9.6)
 45–54 yrs12,831 (21.3)6199 (21.4)6526 (21.2)64,166 (21.3)
 55–64 yrs16,054 (26.7)7907 (27.4)8046 (26.1)80,017 (26.6)
 65–74 yrs13,928 (23.1)6604 (22.8)7203 (23.4)69,691 (23.2)
 75–84 yrs8101 (13.5)3768 (13.0)4257 (13.8)40,461 (13.5)
 85 yrs +3533 (5.9)1633 (5.6)1873 (6.1)17,630 (5.9)
Marital status
 Married30,766 (51.1)14,769 (51.1)15,744 (51.1)152,775 (50.8)
 Not married29,451 (48.9)14,134 (48.9)15,096 (48.9)148,016 (49.2)
Level of education
 Low18,755 (31.1)8844 (30.6)9684 (31.4)100,623 (33.5)
 Middle22,808 (37.9)10,987 (38.0)11,689 (37.9)115,079 (38.3)
 High16,626 (27.6)8143 (28.2)8420 (27.3)73,246 (24.4)
 Missing2028 (3.4)929 (3.2)1047 (3.4)11,843 (3.9)
CCI
 050,825 (84.4)24,447 (84.6)25,985 (84.3)255,689 (85.0)
 14788 (8.0)2249 (7.8)2483 (8.1)24,597 (8.2)
 22879 (4.8)1398 (4.8)1470 (4.8)13,350 (4.4)
 3+1725 (2.9)809 (2.8)902 (2.9)7155 (2.4)
No. of previous IHD events
 057,877 (96.1)27,775 (96.1)29,641 (96.1)288,263 (95.8)
 11421 (2.4)679 (2.3)732 (2.4)7598 (2.5)
 2+919 (1.5)449 (1.6)467 (1.5)4930 (1.6)
  1. Characteristics of the study population by all women with breast cancer (BC), women with right-sided BC, women with left-sided BC, and women without BC diagnosis
  2. No. Number, FU follow-up, yrs years, SD standard deviation, CCI Charlson Comorbidity Index