Category of assisted reproduction | No. (%) of preterm births n = 182 | Crude OR (95%CI) | Adjusted OR* (95%CI) |
---|---|---|---|
Use of OS alone | 38 (20.9) | 1.00 | 1.00 |
Use of ART alone | 15 (1.0) | 1.13 (0.60–2.13) | 1.08 (0.58–2.08) |
Use of both OS and ART | 103 (2.8) | 0.96 (0.65–1.41) | 0.91 (0.61–1.36) |
Note: ART = artificial reproductive technologies, CI = confidence interval, OR = odds ratio, OS = ovarian stimulators.
↵* Adjusted for sociodemographic variables (maternal age, urban dwelling, recipient of social assistance, sex of the child) as well as maternal comorbidities measured within 12 mo before the first day of gestation (hypertension, diabetes, asthma, epilepsy, depression or anxiety, coagulopathy, infection, prior pregnancy and other medication use) and during pregnancy (smoking and obesity).