Table 1 Characteristics of study participants by dietary intake of total industrial trans fatty acid and total ruminant trans fatty acid
From: Dietary intake of trans fatty acids and breast cancer risk in 9 European countries
Total industrial trans fatty acid intake, median (IQR) | Total ruminant trans fatty acid intake, median (IQR) | |||
|---|---|---|---|---|
Quintile 1 | Quintile 5 | Quintile 1 | Quintile 5 | |
Age at recruitment, years | 51.2 (44.0–57.2) | 51.2 (43.8–58.5) | 53.0 (48.3–59.1) | 50.1 (44.8–57.1) |
Follow-up, years | 14.9 (13.8–16.3) | 15.9 (14.1–17.3) | 16.1 (14.1–17.5) | 14.8 (12.2–15.2) |
Weight, kg | 63.5 (57.0–71.1) | 64.1 (58.0–72.0) | 66 (59.5–74.0) | 61.4 (55.7–68.6) |
Height, cm | 159.5 (155.0–164) | 164 (160.0–168.1) | 163.0 (158.2–167.5) | 162.4 (158.2–167.0) |
Body mass index (BMI), kg/m2 | 24.9 (22.3–28.2) | 23.8 (21.6–26.6) | 24.8 (22.4–28.0) | 23.1 (21.1–25.8) |
Number of full-term pregnancies | 1.0 (1.0–1.0) | 1.0 (1.0–1.0) | 1.0 (1.0–1.0) | 1.0 (1.0–1.0) |
Ever use oral contraceptives (%) | ||||
Yes | 31,013 (48.8) | 36,167 (61.8) | 31,779 (53.1) | 40,973 (65.0) |
Age at first birth combinations (%) | ||||
Nulliparous | 8374 (13.1) | 9642 (15.1) | 7700 (12.1) | 9773 (15.3) |
Age at first birth < 30 (1–2 children) | 29,686 (46.6) | 24,325 (38.1) | 27,918 (43.8) | 28,447 (44.6) |
Age at first birth < 30 (3< children) | 16,456 (25.8) | 15,082 (23.6) | 17,540 (27.5) | 14,536 (22.8) |
Age at first birth ≥ 30 | 7486 (11.7) | 7003 (10.9) | 5672 (8.9) | 7655 (12.0) |
Ever use hormone replacement therapy for menopause (%) | ||||
Yes | 13,345 (48.9) | 15,832 (54.9) | 18,372 (54.9) | 16,432 (65.2) |
Ever breastfed (%) | ||||
Yes | 44,205 (71.8) | 37,254 (74.0) | 43,305 (78.9) | 39,427 (66.6) |
Menopausal status (%) | ||||
Premenopausal | 24,076 (37.7) | 21,332 (33.4) | 15,837 (24.8) | 23,139 (36.3) |
Postmenopausal | 26,710 (41.9) | 28,886 (45.3) | 34,109 (53.5) | 26,157 (41.0) |
Age at menopause, years | 48.6 (46.0–52.0) | 48.6 (46.0–52.0) | 48.7 (46.0–52.0) | 48.9 (46.0–52.0) |
Alcohol intake (g/day) | ||||
None | 16,483 (25.8) | 8166 (12.8) | 12,376 (19.4) | 7330 (11.5) |
> 60 g/day | 7193 (11.2) | 2908 (4.5) | 5138 (8.0) | 5521 (8.6) |
Total dietary energy intake (kcal/day) | 1779 (1835–2527) | 2155 (1835–2527) | 1667 (1370–2008) | 2305 (1960–2700) |
Education status (%) | ||||
None and primary school | 29,078 (45.6) | 15,907 (24.9) | 25,398 (39.8) | 10,750 (16.8) |
Higher education | 12,360 (19.4) | 12,291 (19.2) | 9581 (15.0) | 20,510 (32.2) |
Physical activity (%) | ||||
Inactive | 20,789 (32.6) | 11,591 (18.1) | 13,776 (21.6) | 13,467 (21.1) |
Active | 6703 (10.5) | 11,457 (17.9) | 12,725 (19.9) | 7922 (12.4) |
Smoking status (%) | ||||
Never | 38,253 (60.0) | 32,130 (50.4) | 33,578 (52.6) | 38,912 (61.1) |
Current | 12,300 (19.3) | 15,844 (24.8) | 15,468 (24.2) | 9095 (14.2) |