Table 1. Characteristics of patients and treatment in the validation sample, consisting of 130,960 IVF cycles.
| Characteristic | Number in sample | Percentage of sample | Percentage using donor eggs |
|---|---|---|---|
| Live births | 33,553 | 25.6% | |
| Patient age at treatment (years) | |||
| 18–34 | 53,556 | 40.9% | 1.0% |
| 35–37 | 31,240 | 23.4% | 1.6% |
| 38–39 | 21,348 | 16.3% | 2.2% |
| 40–42 | 18,143 | 13.9% | 4.8% |
| 43–44 | 4,688 | 3.6% | 14.0% |
| 45–50 | 1,985 | 1.5% | 49.0% |
| Duration of infertility (years) | |||
| 0 | 3,125 | 2.4% | |
| 1–3 | 59,996 | 45.8% | |
| 4–6 | 44,400 | 33.9% | |
| 7–9 | 14,485 | 11.1% | |
| 10–12 | 5,560 | 4.3% | |
| 13- | 3,394 | 2.6% | |
| Previous live birth | |||
| Yes | 23,444 | 17.9% | |
| No | 107,516 | 82.1% | |
| Previous unsuccessful IVF cycles | |||
| 0 | 83,838 | 64.0% | |
| 1 | 25,051 | 19.1% | |
| 2 | 11,862 | 9.1% | |
| 3- | 10,209 | 7.8% | |
| Treatment type | |||
| IVF | 63,245 | 48.3% | |
| IVF plus ICSI | 67,715 | 51.7% | |
| Source of egg | |||
| Patient | 126,962 | 97.0% | |
| Donor | 3,998 | 3.0% | |
| Cause of infertility | |||
| Unexplained | 45,928 | 35.1% | |
| Tubal only | 15,244 | 11.6% | |
| Ovulatory only | 8,526 | 6.5% | |
| Endometriosis only | 5,164 | 3.9% | |
| Cervical only | 5 | 0.0% | |
| Male cause only | 43,663 | 33.3% | |
| Multiple causes | 12,430 | 9.5% | |