Table 1.
Demographic characteristics and sex hormone levels of the participants (n=448)
| Variable | Value |
|---|---|
| Age (year), mean±s.d. | 34.9±5.9 |
| BMI (kg m−2), mean±s.d. | 25.7±3.7 |
| BMI groups, n (%) | |
| Underweight | 7 (1.6) |
| Normal | 133 (29.7) |
| Overweight | 203 (45.3) |
| Obese | 105 (23.4) |
| Race, n (%) | |
| Han | 395 (88.2) |
| Others | 53 (11.8) |
| Education level, n (%) | |
| Low | 134 (29.9) |
| Middle | 158 (35.3) |
| High | 156 (34.8) |
| Occupation, n (%) | |
| Professional workers | 60 (13.4) |
| Staffs | 145 (32.4) |
| Servicers | 95 (21.2) |
| Farmers | 24 (5.4) |
| Equipment operators | 41 (9.1) |
| Others | 83 (18.5) |
| Smoke, n (%) | |
| No | 260 (58.0) |
| Yes | 188 (42.0) |
| Alcohol consumption, n (%) | |
| No | 436 (97.3) |
| Yes | 12 (2.7) |
| PRL (µIU ml−1), median (IQR) | 226.8 (175.7–308.7) |
| FSH (mIU ml−1), median (IQR) | 3.7 (2.8–5.2) |
| LH (mIU ml−1), median (IQR) | 3.9 (2.9–5.3) |
| T (nmol l−1), median (IQR) | 12.7 (9.7–16.6) |
| E2 (pg ml−1), median (IQR) | 29.3 (23.9–36.9) |
IQR: interquartile range; s.d.: standard deviation; BMI: body mass index; PRL: prolactin; FSH: follicle-stimulating hormone; LH: luteinizing hormone; T: testosterone; E2: estradiol