Table 1.
Baseline characteristics of the participants (N = 334).
| Characteristic | N = 334 (mean ± SD)/ n (%) |
|---|---|
| Age, year (mean ± SD) | 30.66 ± 3.68 |
| Education, year | |
| < 12 | 112 (33.5) |
| > 12 | 222 (66.5) |
| Household income, CNY (per year) | |
| < 30,000 | 26 (7.7) |
| 30,000 -80,000 | 70 (30.0) |
| 80,000 -150,000 | 234 (70.1) |
| > 150,000 | 4 (1.2) |
| BMI, kg/m2 (Mean ± SD) | 24.85 ± 4.85 |
| < 18.5 | 16 (4.8) |
| 18.5–23.9 | 100 (29.9) |
| 24–27.9 | 168 (50.3) |
| ≥ 28 | 60 (18.0) |
| Subfertility | |
| Primary | 212 (63.5) |
| Secondary | 122 (36.5) |
| Parity | |
| Nulliparous | 295 (88.3) |
| Multiparous | 39 (11.7) |
| Duration of subfertility, years | |
| < 2 | 75 (22.5) |
| 2–5 | 186 (55.7) |
| > 5 | 73 (21.9) |
BMI, body mass index; CNY, China yuan.