End of 1st trimester BMI | 2009 IOM guidelinesb | Pregnancy outcomes, risk ratio (95% CI)a | |||
---|---|---|---|---|---|
LBWc | Preterm birthd | SGA | LGA | ||
Cases (n, percent)e | 92, 7.5% | 195, 15.9% | 199, 16.2% | 134, 10.9% | |
Total (N = 1230) | Inadequate GWG (n = 517, 42.0%) | 1.30 (0.67, 2.54) | 0.99 (0.70, 1.40) | 1.32 (0.95, 1.81) | 0.54 (0.36, 0.80) |
Adequate GWG (n = 270, 22.0%) | Ref (OR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | |
Excessive GWG (n = 443, 36.0%) | 1.27 (0.63, 2.53) | 1.22 (0.86, 1.73) | 0.96 (0.67, 1.38) | 0.89 (0.62, 1.29) | |
Cases (n, percent) | 66, 8.7% | 124, 16.4% | 130, 17.2% | 82, 10.8% | |
Normal 18.5 ≤ BMI < 25 (N = 756) | Inadequate GWG (n = 343, 45.4%) | 1.38 (0.63, 3.06) | 1.20 (0.79, 1.84) | 1.29 (0.89, 1.89) | 0.65 (0.39, 1.07) |
Adequate GWG (n = 189, 25.0%) | Ref (OR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | |
Excessive GWG (n = 224, 29.6%) | 1.17 (0.50, 2.72) | 1.59 (1.03, 2.44) | 0.96 (0.61, 1.50) | 1.31 (0.83, 2.06) | |
Cases (n, percent) | 16, 4.0% | 59, 14.7% | 53, 13.2% | 50, 12.4% | |
Overweight or obese BMI ≥ 25 (N = 402) | Inadequate GWG (n = 132, 32.8%) | 0.54 (0.10, 2.85) | 0.79 (0.40, 1.58) | 1.10 (0.55, 2.18) | 0.34 (0.17, 0.70) |
Adequate GWG (n = 65, 16.2%) | Ref (OR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | Ref (RR = 1.00) | |
Excessive GWG (n = 205, 51.0%) | 0.87 (0.21, 3.69) | 0.85 (0.46, 1.57) | 0.87 (0.44, 1.72) | 0.45 (0.25, 0.80) | |
P-heterogeneityf | 0.97 | 0.64 | 0.97 | 0.01 |