Table 1.
Baseline characteristics of the female participants in the SUN Project for the overall sample and according to categories of adherence to the 2018 WCRF/AICR recommendation.
| Total n = 10,930 |
Minimal Compliance n = 817 |
Intermediate Compliance n = 8521 |
Maximum Compliance n = 1592 |
||
|---|---|---|---|---|---|
| 0–7 points | ≤3 points | 3–≤5 points | >5 points | p-Value | |
| Age at recruitment (years), mean (SD) | 35.0 (10.6) | 32.0 (8.9) | 34.6 (10.3) | 39.9 (11.3) | <0.01 |
| Time of university education (years), mean (SD) | 4.8 (1.3) | 4.9 (1.3) | 4.8 (1.3) | 4.8 (1.4) | 0.35 |
| Smoking status, n (%) Never Former Current |
5646 (51.6) 2491 (22.8) 2794 (25.6) |
393 (48.1) 252 (30.8) 172 (21.1) |
4403 (51.7) 1980 (23.2) 2138 (25.1) |
849 (53.3) 259 (16.3) 484 (30.4) |
<0.01 |
| Family history of breast cancer, n (%) No Yes, after the age of 45 years Yes, up to the age of 45 years |
9765 (89.3) 947 (8.7) 218 (2.0) |
717 (87.7) 84 (10.3) 16 (2.0) |
7627 (89.5) 729 (8.6) 165 (1.9) |
1421 (89.3) 134 (8.4) 37 (2.3) |
0.41 |
| Menopausal status at recruitment, n (%) Pre-menopausal Post-menopausal |
10,073 (92.2) 857 (7.8) |
789 (96.6) 28 (3.4) |
7935 (93.1) 586 (6.9) |
1349 (84.7) 243 (15.3) |
<0.01 |
| Age at menarche, n (%) ≤11 years 12–13 years 14 years ≥15 years |
2211 (20.2) 5981 (54.7) 1852 (16.9) 886 (8.1) |
145 (17.7) 445 (54.5) 157 (19.2) 70 (8.6) |
1723 (20.2) 4663 (54.7) 1450 (17.0) 685 (8.1) |
343 (21.6) 873 (54.8) 245 (15.4) 131 (8.2) |
0.18 |
| Age at first pregnancy, n (%) Age < 25 years and nulliparous Age ≥ 25 years and nulliparous First pregnancy before 25 years First pregnancy between 25 and 30 years of age First pregnancy being 30 years old or older |
1943 (17.8) 5364 (49.1) 511 (4.7) 1582 (14.4) 1530 (14.0) |
185 (22.6) 441 (54.0) 22 (2.7) 80 (9.8) 89 (10.9) |
1595 (18.7) 4172 (49.0) 369 (4.3) 1205 (14.1) 1180 (13.9) |
163 (10.2) 751 (47.2) 120 (7.5) 297 (18.7) 261 (16.4) |
<0.01 |
| Hormone-replacement therapy, n (%) No Yes |
10,414 (95.3) 516 (4.7) |
800 (97.9) 17 (2.1) |
8165 (95.8) 356 (4.2) |
1449 (91.0) 143 (9.0) |
<0.01 |
| Oral contraceptive use, n (%) No Yes |
10,665 (97.6) 265 (2.4) |
793 (91.1) 24 (2.9) |
8308 (97.5) 213 (2.5) |
1564 (98.2) 28 (1.8) |
0.13 |
SD: standard deviation; WCRF/AICR: World Cancer Research Fund/American Institute for Cancer Research.