Table 2

Infant health service use in relation to maternal early-pregnancy BMI (kg/m2) by type of service

Health serviceBMI 18.5–24.9BMI 25–29.9BMI≥30
Mean (SD)Mean (SD)Rate ratio* (95% CI)Mean (SD)Rate ratio* (95% CI)
Inpatient1.7 (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 duration1.1 (2.2)1.0 (1.7)1.11 (0.89 to 1.38)1.7 (3.9)1.55 (1.37 to 1.74)
Outpatient1.6 (3.7)1.5 (2.9)0.93 (0.79 to 1.08)1.5 (3.3)0.96 (0.81 to 1.14)
GP14.1 (7.8)14.0 (6.3)0.99 (0.95 to 1.04)15.5 (9.7)1.10 (1.03 to 1.16)
Medication6.5 (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.