Table 4.
Adjusted odds ratios of women with and without polycystic ovary syndrome (PCOS) and singleton preterm births (<37+0 weeks) undergoing assisted reproductive technology in Sweden, 1995 to 2007
| Preterm birth | Assisted reproductive technology* | Rate | Adjusted odds ratio† (95% CI) | No assisted reproductive technology* | Rate | Adjusted odds ratio† (95% CI) | ||
|---|---|---|---|---|---|---|---|---|
| Women with PCOS | Women without PCOS | Yes | No | |||||
| Yes | 41 | 1400 | 7.96 | 1.08 (0.76 to 1.53) | 256 | 58 723 | 7.83 | 1.54 (1.33 to 1.79) |
| No | 474 | 16 618 | 7.77 | 1.00 | 3012 | 1 113 426 | 5.01 | 1.00 |
| Data missing | 2 | — | — | — | 4 | 1167 | — | — |
*P=0.055 for interaction analysis for assisted reproductive technology and PCOS in relation to preterm birth.
†Adjusted for maternal age, parity, body mass index, years of education, cigarette consumption, and assisted reproductive technology.