Background
Methods
Cohorts
Pre-pregnancy BMI | Total weight gain | |
---|---|---|
Range in kg | Range in lbs | |
Underweight (BMI < 18.5 kg/m2) | 12.5 – 18 | 28 - 40 |
Normal-weight (BMI 18.5 – 24.9 kg/m2) | 11.5 – 16 | 25 - 35 |
Overweight (BMI 25.0 – 29.9 kg/m2) | 7 – 11.5 | 15 - 25 |
Obese (BMI > 30 kg/m2) | 5 - 9 | 11 - 20 |
Statistical analysis
Results
Maternal parameters and general weight gain
N | Mean | SD | Range | |
---|---|---|---|---|
Maternal age | 11771 | 32.5 | 5.4 | 18.0-48.1 |
Maternal height in cm (in) | 11771 | 167.2 (65.8) | 6.7 (26.4) | 108.0-192.0 (42.5-75.6) |
Maternal weight in kg (lbs) | 11684 | 66.7 (147.0) | 14.3 (31.5) | 37.0-174.8 (81.6-385.4) |
Maternal BMI+
| 11678 | 24.0 | 5.0 | 13.1-86.8 |
Maternal BMI classification (n;%)$: underweight (BMI < 18.5 kg/m2) | 584 (5.0) | |||
Normal-weight (BMI 18.5 – 24.9 kg/m2) | 7681 (65.8) | |||
Overweight (BMI 25.0 – 29.9 kg/m2) | 2225 (19.1) | |||
Obese (BMI > 30 kg/m2) | 1188 (10.2) | |||
Parity | 11601 | 1.7 | 1.0 | 0-12 |
BMI classification+
| n | Mean ± SD in kg | Mean ± SD in lbs | 95% Cl in kg (lbs) |
---|---|---|---|---|
underweight (BMI < 18.5 kg/m2) | 478 | 13.6 ± 5.0 | 30.0 ± 11.0 | 13.1-14.1 (28.9-31.1) |
normal-weight (BMI 18.5 – 24.9 kg/m2) | 6058 | 13.8 ± 5.2 | 30.4 ± 11.5 | 13.7-13.9 (30.2-30.6) |
overweight (BMI 25.0 – 29.9 kg/m2) | 1740 | 12.6 ± 5.9 | 27.8 ± 13.0 | 12.3-12.8 (27.1-28.2) |
obese (BMI > 30 kg/m2) | 917 | 10.7 ± 6.9 | 23.6 ± 15.2 | 10.3-11.0 (22.7-24.3) |
Relative weight gain
Birth weight
Birth weight depending on relative weight gain
Total maternal weight gain | n | Mean | SD | 95% Cl |
---|---|---|---|---|
Low weight gain
| 2514 | 3107.7 | 527.4 | 3086.5 - 3128.9 |
Normal weight gain
| 3347 | 3258.2 | 541.0 | 3239.8 – 3276.5 |
High weight gain
| 3303 | 3412.4 | 552.8 | 3394.0 – 3430.9 |