Infant health service use in relation to maternal early-pregnancy BMI (kg/m2) by type of service
| Health service | BMI 18.5–24.9 | BMI 25–29.9 | BMI≥30 | ||
|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Rate ratio* (95% CI) | Mean (SD) | Rate ratio* (95% CI) | |
| Inpatient | 1.7 (2.1) | 2.1 (1.7) | 1.23 (0.94 to 1.61) | 2.4 (1.9) | 1.39 (1.04 to 1.84) |
| Inpatient duration | 1.1 (2.2) | 1.0 (1.7) | 1.11 (0.89 to 1.38) | 1.7 (3.9) | 1.55 (1.37 to 1.74) |
| Outpatient | 1.6 (3.7) | 1.5 (2.9) | 0.93 (0.79 to 1.08) | 1.5 (3.3) | 0.96 (0.81 to 1.14) |
| GP | 14.1 (7.8) | 14.0 (6.3) | 0.99 (0.95 to 1.04) | 15.5 (9.7) | 1.10 (1.03 to 1.16) |
| Medication | 6.5 (9.2) | 5.9 (8.7) | 0.99 (0.95 to 1.05) | 7.2 (8.6) | 1.10 (1.04 to 1.16) |
*Rate ratios based on mean utilisation of health services over 12 months relative to participants with a maternal pre-pregnancy BMI of 18.5–24.9 kg/m2.
BMI, body mass index; GP, general practice.