Table 2.
Baseline characteristics of the Seguimiento Universidad de Navarra Project participants according to quartiles of adherence to the Western or the Mediterranean dietary pattern, 1999–2016
| Dietary pattern quartiles | ||||||||
|---|---|---|---|---|---|---|---|---|
| Western dietary pattern | Mediterranean dietary pattern | |||||||
| Q1 | Q4 | Q1 | Q4 | |||||
| Variable | Mean | sd | Mean | sd | Mean | sd | Mean | sd |
| N | 2679 | 2678 | 2679 | 2678 | ||||
| Age (years) | 39·2 | 11·7 | 31·1 | 8·8 | 34·7 | 10·3 | 35·2 | 10·9 |
| Body mass index (kg/m2) | 22·6 | 3·2 | 21·6 | 2·9 | 22·2 | 3·1 | 22·3 | 3·1 |
| Physical activity (METs-h/week) | 28·4 | 22·7 | 20·9 | 17·3 | 22·5 | 19·7 | 26·7 | 22·5 |
| Total energy intake (kJ/d)* | 9075 | 2452 | 10 857 | 2017 | 7046 | 1665 | 11 987 | 1523 |
| Alcohol intake (g/d) | 4·2 | 6·5 | 3·7 | 5·2 | 3·2 | 4·8 | 4·9 | 6·8 |
| Years at university | 4·9 | 1·4 | 4·8 | 1·3 | 4·9 | 1·4 | 4·8 | 1·3 |
| Height (cm) | 163 | 6 | 164 | 6 | 163 | 6 | 164 | 6 |
| Number of pregnancies of more than 6 months | 0·8 | 1·2 | 0·6 | 1·2 | 0·6 | 1·1 | 0·7 | 1·1 |
| Lifetime breastfeeding (months) | 2·6 | 5·1 | 2·1 | 5·3 | 2·0 | 4·6 | 2·6 | 5·3 |
| Diabetes (%) | 1·7 | 0·6 | 1·0 | 1·5 | ||||
| Pregnancy before age of 30 years (%) | 23·1 | 16·1 | 17·1 | 20·3 | ||||
| Tobacco (%) | ||||||||
| Never smoker | 48·8 | 50·4 | 48·0 | 52·8 | ||||
| Former smoker | 20·6 | 21·1 | 28·4 | 14·8 | ||||
| Current smoker | 27·7 | 26·1 | 20·9 | 30·0 | ||||
| Family history of BC (%)† | ||||||||
| No | 88·7 | 88·8 | 89·2 | 88·8 | ||||
| Yes, after the age of 45 years | 9·2 | 8·9 | 8·6 | 9·1 | ||||
| Yes, up to the age of 45 years | 2·1 | 2·3 | 2·2 | 2·1 | ||||
| Age of menarche (%) | ||||||||
| <10 years | 1·8 | 0·8 | 1·2 | 1·2 | ||||
| 10–11 years | 21·2 | 16·3 | 18·6 | 19·6 | ||||
| 12–13 years | 54·6 | 55·1 | 54·6 | 53·8 | ||||
| 14–15 years | 20·0 | 24·5 | 22·9 | 23·6 | ||||
| >=16 years | 2·4 | 3·3 | 2·6 | 2·8 | ||||
| Menopausal status (%) | ||||||||
| Premenopausal (%) | 77·8 | 95·5 | 89·3 | 87·8 | ||||
| Postmenopausal (%) | 20·7 | 4·2 | 10·7 | 12·2 | ||||
| Postmenopausal <50 years (%)‡ | 65·6 | 71·1 | 67·5 | 68·2 | ||||
| Postmenopausal >=50 years (%)‡ | 34·4 | 28·9 | 32·5 | 31·8 | ||||
| Use of hormone replacement therapy (%)‡ | 38·0 | 33·9 | 38·1 | 33·3 | ||||
| Time of use of hormone replacement therapy (years)† | 1·3 | 2·4 | 1·3 | 2·5 | 1·3 | 2·4 | 1·1 | 2·2 |
BC: breast cancer.
*
To convert kcal to kJ, multiply by 4·184.
†
Information from mother, sister and both grandmothers was collected.
‡
Only for postmenopausal women.