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 |
Abbreviations: n, number of observations; SD, standard deviation; BMI, body-mass-index; min., minimum; max, maximum; kg, kilogram; m2, square meter; HRT, hormone replacement therapy.
*Numbers may not add up to 424 due to missing values.