Table 1.

Exposure characteristics of cases and controls in the AMBER Consortium stratified by study: recent alcohol intake, smoking status, oral contraceptive use, and menopausal status

CBCS N (%)WCHS N (%)MEC N (%)BWHS N (%)Total N (%)
CasesControlsCasesControlsCasesControlsCasesControlsCasesControls
Number of alcoholic drinks per week
 Never drinkers293 (37.5)309 (39.4)798 (65.4)791 (65.1)629 (55.5)2,360 (53.3)797 (40.4)4,063 (37.6)2,517 (49.3)7,523 (43.4)
 >0–<4193 (24.7)232 (29.6)113 (9.3)111 (9.1)226 (19.9)906 (20.5)492 (24.9)2,868 (26.6)1,024 (20.1)4,117 (23.9)
 ≥4–<732 (4.1)44 (5.6)40 (3.3)43 (3.5)43 (3.8)174 (3.9)109 (5.5)615 (5.7)224 (4.4)876 (5.1)
 ≥7–<1446 (5.9)24 (3.1)30 (2.5)38 (3.1)46 (4.1)192 (4.3)68 (3.5)351 (3.3)190 (3.7)605 (3.5)
 ≥1442 (5.4)30 (3.8)23 (1.9)22 (1.8)83 (7.3)259 (5.9)30 (1.5)135 (1.3)178 (3.5)446 (2.6)
 Past drinkers175 (22.4)145 (18.5)216 (17.7)211 (17.4)107 (9.4)540 (12.2)477 (24.2)2,767 (25.6)975 (19.1)3,663 (21.3)
Smoking status
 Never smoker435 (55.7)467 (59.6)745 (61.1)702 (57.7)508 (45.7)2,050 (46.9)1,168 (59.3)6,288 (58.3)2,856 (56.2)9,507 (55.4)
 Current smoker134 (17.2)150 (19.1)199 (16.3)244 (20.1)216 (19.4)807 (18.5)343 (17.4)1,978 (18.3)892 (17.6)3,179 (18.5)
 Former smoker212 (27.1)167 (21.3)276 (22.6)270 (22.2)388 (34.9)1,515 (34.7)460 (23.3)2,525 (23.4)1,336 (26.3)4,477 (26.1)
 Missing00002259282467
Oral contraceptive use
 Never, <1 year380 (48.7)386 (49.4)589 (48.6)593 (49.1)688 (63.1)2,780 (66.1)825 (41.8)4,831 (44.7)2,482 (49.1)8,590 (55.6)
 1–9 years276 (35.3)295 (37.8)422 (34.8)441 (36.5)279 (25.6)994 (23.7)820 (41.6)4,398 (40.7)1,797 (35.5)6,128 (36.1)
 10+years125 (16.0)100 (12.8)202 (16.7)175 (14.5)123 (11.3)429 (10.2)328 (16.6)1,570 (14.5)778 (15.4)2,274 (13.4)
 Missing0377442280051238
Menopausal status
 Pre-286 (40.9)298 (43.1)574 (49.6)565 (49.1)140 (12.7)388 (9.0)717 (42.7)4,179 (43.6)1,717 (37.0)5,430 (34.5)
 Post-413 (59.1)393 (56.9)583 (50.4)587 (50.9)964 (87.3)3,905 (91.0)964 (57.4)5,412 (56.4)2,924 (63.0)10,297 (65.5)
 Missing82936364301382921,2084671,503