Characteristics of the 38-IOL group versus 39-Exp group. All data are shown as a number (%) unless otherwise indicated
| Characteristics | 38-IOL group (n=937) | 39-Exp group (n=1276) | Standardized difference |
| Mean (SD) maternal age (years) | 31.9 (5.2) | 31.8 (5.3) | 0.01 |
| BMI (kg/m2) | |||
| Underweight (<18.5) | 54 (5.8) | 147 (11.5%) | −0.21 |
| Normal (≤18.5 to <25) | 259 (27.6) | 414 (32.4) | −0.10 |
| Overweight (≤25 to <30) | 249 (26.6) | 316 (24.8) | 0.04 |
| Obese (>30) | 375 (40.0) | 399 (31.3) | 0.18 |
| Missing | 40 (4.3) | 95 (7.4) | −0.14 |
| Mean (SD) BMI (kg/m2) | 28.1 (7.4) | 29.9 (7.6) | 0.23 |
| Nulliparity | 451 (48.1) | 647 (50.7) | −0.05 |
| Female newborn infant | 442 (47.2) | 614 (48.1) | −0.02 |
| Type 1 diabetes mellitus | 316 (33.7) | 315 (24.7) | 0.2 |
| Type 2 diabetes mellitus | 553 (59.0) | 693 (54.3) | 0.1 |
| Insulin treatment | 438 (79.2) | 321 (46.3) | 0.72 |
| Unknown type, diabetes mellitus | 68 (7.3) | 268 (21.0) | −0.4 |
Data sources: Better Outcomes Registry and Network Ontario (2012–2017), Canadian Institute of Health Information-Discharge Abstract Database (CIHI-DAD; 2012–2015).
Cohort definition: Women who had a singleton birth who met the inclusion criteria.
BMI, body mass index; IOL, induction of labor.