Table 1 Characteristics of study sample
n* | Mean | SD | Min. | Max. | Median | |
|---|---|---|---|---|---|---|
Age (at recruitment) (years) | 424 | 53.98 | 10.50 | 21.00 | 84.00 | 54.00 |
BMI (at recruitment) (kg/m2) | 420 | 25.23 | 4.86 | 17.31 | 65.76 | 24.46 |
Age at menarche (years) | 407 | 13.21 | 1.49 | 10.00 | 19.00 | 13.00 |
Age at the first birth (years) | 343 | 25.62 | 5.10 | 16.00 | 45.00 | 25.00 |
Number of live births | 406 | 1.70 | 1.05 | 00.00 | 5.00 | 2.00 |
absolute frequency | relative frequency | |||||
(n) | (%) | |||||
Physical activity (at recruitment) | 424 | |||||
yes | 324 | 76 | ||||
no | 100 | 24 | ||||
Alcohol consumption (at recruitment) | 424 | |||||
yes | 283 | 67 | ||||
no | 141 | 33 | ||||
Smoker (at recruitment) | 424 | |||||
yes | 52 | 12 | ||||
no | 372 | 88 | ||||
School education | 417 | |||||
9 years of school | 298 | 71 | ||||
13 years of school | 119 | 29 | ||||
HRT (ever) | 424 | |||||
yes | 128 | 30 | ||||
no | 296 | 70 | ||||
Use of oral contraceptives (ever) | 424 | |||||
yes | 339 | 80 | ||||
no | 85 | 20 | ||||
Mother with history of breast cancer | 424 | |||||
yes | 68 | 16 | ||||
no | 356 | 84 | ||||
Menopausal status | 424 | |||||
premenopausal (< 50) | 150 | 35 | ||||
postmenopausal (≥ 50) | 274 | 65 | ||||
Breast feeding (ever) | 339 | |||||
yes | 272 | 80 | ||||
no | 67 | 20 |