Table I.
Distribution of factors potentially associated with subfertility in 2001 and 2007.
| Planned pregnancies
|
Unplanned pregnancies
|
|||||||
|---|---|---|---|---|---|---|---|---|
| 2001 | 2007 | Total | p-value | 2001 | 2007 | Total | p-value | |
| TTP >12 months | 20.3% | 19.9% | 20.1% | 0.848 | 34.5% | 29.8% | 32.8% | 0.271 |
| TTP >24 months | 9.6% | 11.2% | 10.1% | 0.310 | 18.6% | 14.3% | 17.1% | 0.202 |
| Age | 0.001 | 0.323 | ||||||
| <20 | 3.7% | 4.4% | 3.9% | 13.0% | 16.1% | 14.1% | ||
| 20–<25 | 15.5% | 21.1% | 17.3% | 27.1% | 27.6% | 27.3% | ||
| 25–<30 | 37.0% | 35.9% | 36.7% | 25.4% | 24.8% | 25.2% | ||
| 30–<35 | 30.9% | 23.0% | 28.4% | 22.0% | 15.5% | 19.8% | ||
| 35+ | 13.0% | 15.6% | 13.8% | 12.4% | 16.1% | 13.7% | ||
| BMI | 0.003 | 0.002 | ||||||
| <18.5 (Underweight) | 2.8% | 4.2% | 3.2% | 2.3% | 7.6% | 4.2% | ||
| 18.5–<25 (Normal) | 43.1% | 51.5% | 45.8% | 39.6% | 50.0% | 43.2% | ||
| 25–<30 (Overweight) | 37.0% | 26.9% | 33.8% | 40.1% | 23.8% | 34.4% | ||
| ≥30 (Obese) | 17.2% | 17.4% | 17.2% | 18.1% | 18.6% | 18.2% | ||
| Contraceptive use | 0.000 | 0.034 | ||||||
| Condom or IUD | 22.0% | 14.4% | 19.6% | 13.8% | 12.2% | 13.2% | ||
| No method | 10.6% | 16.3% | 12.4% | 27.5% | 25.2% | 26.7% | ||
| Injectable | 2.8% | 4.5% | 3.3% | 1.5% | 7.0% | 3.5% | ||
| POP, COC, other hormonal | 64.7% | 64.7% | 64.7% | 57.2% | 55.7% | 56.7% | ||
| Coital frequency | 0.336 | 0.176 | ||||||
| Fortnightly or less | 7.4% | 7.7% | 7.5% | 18.9% | 17.3% | 18.3% | ||
| Once/week | 21.5% | 18.6% | 20.6% | 17.4% | 16.9% | 17.2% | ||
| 2–4 times/week | 60.6% | 60.9% | 60.7% | 51.4% | 46.3% | 49.6% | ||
| ≥5 times/week | 10.5% | 12.9% | 11.2% | 12.3% | 19.5% | 14.9% | ||
| Previous pregnancies | 0.036 | 0.097 | ||||||
| None | 25.5% | 29.1% | 26.7% | 28.3% | 36.5% | 31.1% | ||
| 1 | 37.9% | 31.6% | 35.9% | 24.9% | 25.1% | 25.0% | ||
| ≥2 | 36.6% | 39.3% | 37.5% | 46.9% | 38.4% | 43.9% | ||
| Age at menarche | 0.338 | 0.050 | ||||||
| <12 | 18.1% | 20.2% | 18.8% | 20.3% | 28.9% | 23.9% | ||
| ≥12 | 81.9% | 79.8% | 81.2% | 79.7% | 71.1% | 76.1% | ||
| History of menstrual problems | 0.000 | 0.054 | ||||||
| Yes | 22.6% | 33.4% | 26.1% | 32.3% | 40.7% | 35.3% | ||
| No | 77.4% | 66.6% | 73.9% | 67.7% | 59.3% | 64.7% | ||
| History of PID or Chlamydia | 0.001 | 0.031 | ||||||
| Yes | 7.3% | 12.3% | 8.9% | 10.4% | 16.8% | 12.7% | ||
| No | 92.7% | 87.7% | 91.1% | 89.6% | 83.2% | 87.3% | ||
| History of problems with reproductive organs | 0.083 | 0.194 | ||||||
| Yes | 15.5% | 18.7% | 16.5% | 13.1% | 17.2% | 14.5% | ||
| No | 84.5% | 81.3% | 83.5% | 86.9% | 85.4% | 85.5% | ||
| History of problems with hormonal imbalance | 0.010 | 0.000 | ||||||
| Yes | 6.6% | 10.1% | 7.7% | 1.8% | 9.6% | 4.5% | ||
| No | 93.4% | 89.9% | 92.3% | 98.2% | 90.4% | 95.5% | ||
| Smoking | 0.263 | 0.057 | ||||||
| None | 80.9% | 77.9% | 80.0% | 61.6% | 53.4% | 58.8% | ||
| 1–19 per day | 16.6% | 19.9% | 17.6% | 29.4% | 39.5% | 32.8% | ||
| ≥20 per day | 2.5% | 2.2% | 2.4% | 9.0% | 7.1% | 8.4% | ||
| Caffeine | 0.000 | 0.000 | ||||||
| None | 11.5% | 16.0% | 12.9% | 6.2% | 20.8% | 11.4% | ||
| 1–6 cups/week | 80.7% | 80.5% | 80.7% | 80.2% | 69.4% | 76.4% | ||
| ≥7 cups/week | 7.8% | 3.5% | 6.4% | 13.6% | 9.8% | 12.2% | ||
| Alcohol use | 0.000 | 0.311 | ||||||
| None | 54.1% | 68.3% | 58.5% | 64.0% | 66.0% | 64.7% | ||
| 1–9 drinks/week | 42.6% | 27.7% | 38.0% | 34.9% | 31.2% | 33.6% | ||
| ≥10 drinks/week | 3.4% | 4.0% | 3.5% | 1.1% | 2.8% | 1.7% | ||
| Drug use | 0.244 | 0.000 | ||||||
| Ever | 2.7% | 3.7% | 3.0% | 4.0% | 15.2% | 7.9% | ||
| Never | 97.3% | 96.3% | 97.0% | 96.0% | 84.8% | 92.1% | ||
| Partner’s age | 0.791 | 0.017 | ||||||
| <40 | 91.9% | 91.0% | 91.6% | 94.1% | 88.3% | 92.1% | ||
| 40–<45 | 6.1% | 7.0% | 6.4% | 4.2% | 4.9% | 4.4% | ||
| ≥45 | 2.0% | 2.0% | 2.0% | 1.7% | 6.8% | 3.5% | ||
| Partner’s smoking | 0.000 | 0.000 | ||||||
| None | 60.3% | 64.2% | 61.6% | 43.5% | 41.2% | 42.7% | ||
| 1–19 per day | 18.4% | 24.4% | 20.3% | 20.9% | 41.3% | 28.1% | ||
| ≥20 per day | 21.3% | 11.4% | 18.1% | 35.6% | 17.5% | 29.2% | ||
| Partner’s alcohol use | 0.000 | 0.339 | ||||||
| None | 17.5% | 26.4% | 20.3% | 31.2% | 37.5% | 33.4% | ||
| 1–19 drinks/week | 78.3% | 65.8% | 74.3% | 60.5% | 56.0% | 58.9% | ||
| ≥20 drinks/week | 4.3% | 7.8% | 5.4% | 8.4% | 6.5% | 7.7% | ||
| Partner’s children from previous relationship | 0.344 | 0.266 | ||||||
| Any | 15.0% | 16.8% | 15.6% | 20.3% | 24.6% | 21.8% | ||
| None | 85.0% | 83.2% | 84.4% | 79.7% | 75.4% | 78.2% | ||