Table 1 Characteristics of the study population: 66 722 women in the French E3N cohort study
Median [Interquartile range] or Number (Percent) | |
|---|---|
Sociodemographic characteristics | |
Age at baseline (years) | 51.50 [47.08, 57.5] |
Birth generation | |
≤ 1930 | 6414 (9.6%) |
(1930; 1935] | 8931 (13.4%) |
(1935; 1940] | 13,354 (20.0%) |
(1940; 1945] | 16,459 (24.7%) |
> 1945 | 21,564 (32.3%) |
School educational level (years) | |
Missing value | 2272 (3.4%) |
< 12 | 7524 (11.3%) |
[12–14] | 33,036 (49.5%) |
> 14 | 23,890 (35.8%) |
Hormonal and lifestyle characteristics | |
Physical activity (metabolic equivalents of task-hours/week) | 36.0 [21.5, 57.7] |
Missing value | 433 (0.6%) |
Smoking status | |
Never | 34,379 (51.5%) |
Former | 21,312 (31.9%) |
Current | 8464 (12.7%) |
Missing value | 2567 (3.8%) |
Body mass index (kg/m2) | 22.2 [20.6, 24.2] |
Missing value | 3628 (5.4%) |
Menopausal status and recent HRT use | |
Premenopausal | 35,106 (52.6%) |
Postmenopausal and recent HRT use (less than a year ago) | 9444 (14.2%) |
Postmenopausal and no recent HRT use | 18,592 (28.4%) |
Postmenopausal and missing data on recent HRT use | 3220 (4.8%) |
Parity and age at first full-term pregnancy (FFTP) | |
Nulliparous | 7788 (11.7%) |
One or two children and age at FFTP < 30 years | 32,880 (49.3%) |
At least 3 children and age at FFTP < 30 years | 18,993 (28.5%) |
Age at FFTP ≥ 30 years | 7061 (10.6%) |
Contraceptive pill use (current or past) | |
Ever | 39,179 (58.7%) |
Never | 25,113 (37.6%) |
Missing value | 2430 (3.6%) |
Cumulative duration of previous breastfeeding | |
No breastfeeding | 25,246 (37.8%) |
Cumulative duration of breastfeeding < 6 months | 26,105 (39.1%) |
Cumulative duration of breastfeeding ≥ 6 months | 12,243 (18.3%) |
Missing value | 3128 (4.7%) |
Dietary habits | |
Alcohol consumption (g/day) | 6.9 [1.6, 16.5] |
Adherence to French dietary recommendations (PNNS score) | 3.9 [1.9, 5.9] |
Meat consumption (g/day) | 120.2 [81.3, 104.9] |
Fish consumption (g/day) | 28.7 [17.1, 44.4] |
Fruits and vegetables consumption (g/day) | 655.6 [443.4, 901.5] |
Dairy food consumption (g/day) | 328.0 [224.5, 462.7] |
Starches consumption (g/day) | 146.6 [94.0, 209.4] |