Table 2 Relative risk (RR) with 95% confidence interval (CI) of unrecorded IVF status in the Estonian Medical Birth Registry by maternal characteristics, 2005–2014
Maternal characteristic | No. of IVF mothers | RR (95% CI) | ||
|---|---|---|---|---|
Unrecorded IVF status | Total | Crude | Adjusted* | |
Age (years) | ||||
< 35 | 587 | 2146 | 1.14 (1.02–1.29) | 1.17 (1.04–1.32) |
35–40 | 308 | 1289 | 1 | 1 |
Education | ||||
Higher | 483 | 1846 | 1 | 1 |
Secondary or less | 412 | 1589 | 0.99 (0.89–1.11) | 0.96 (0.86–1.08) |
Ethnicity | ||||
Estonian | 627 | 2534 | 1 | 1 |
Non-Estonian | 268 | 901 | 1.20 (1.06–1.36) | 1.20 (1.06–1.36) |
Marital status | ||||
Married | 500 | 1925 | 1 | 1 |
Other | 395 | 1510 | 1.01 (0.90–1.13) | 1.05 (0.93–1.18) |
Plurality | ||||
Singleton birth | 778 | 2693 | 1.83 (1.54–2.19) | 1.85 (1.55–2.21) |
Multiple birth | 117 | 742 | 1 | 1 |