Medically-induced PTBb | Spontaneous PTBb | All PTBc | |||||||
---|---|---|---|---|---|---|---|---|---|
Crude and adjusted models | OR | 95% C.I. | p-value | OR | 95% C.I. | p-value | OR | 95% C.I. | p-value |
M1: Unadjusted | |||||||||
< 18.5 | 0.75 | 0.42, 1.35 | 0.33 | 1.32 | 0.95, 1.83 | 0.10 | 1.15 | 0.85, 1.55 | 0.37 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 1.28 | 1.01, 1.61 | 0.04 | 1.07 | 0.90, 1.27 | 0.45 | 1.13 | 0.97, 1.31 | 0.11 |
≥ 30.0 | 1.83 | 1.44, 2.34 | <0.001 | 0.98 | 0.80, 1.20 | 0.85 | 1.23 | 1.04, 1.46 | 0.01 |
M2: Adjustedd | |||||||||
<18.5 | 0.94 | 0.52, 1.71 | 0.84 | 1.40 | 0.99, 1.99 | 0.06 | 1.29 | 0.94, 1.77 | 0.12 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 1.11 | 0.87, 1.43 | 0.39 | 0.99 | 0.82, 1.18 | 0.87 | 1.02 | 0.87, 1.20 | 0.79 |
≥ 30.0 | 1.59 | 1.23, 2.05 | <0.001 | 0.90 | 0.73, 1.12 | 0.35 | 1.11 | 0.93, 1.33 | 0.25 |
Models to further assess mediation | |||||||||
M3: M2 + hypertensive disorders of pregnancye | |||||||||
<18.5 | 1.19 | 0.60, 2.34 | 0.62 | 1.41 | 1.00, 2.00 | 0.05 | 1.38 | 0.99, 1.91 | 0.05 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 0.96 | 0.72, 1.29 | 0.81 | 0.98 | 0.81, 1.17 | 0.80 | 0.97 | 0.83, 1.15 | 0.76 |
≥ 30.0 | 1.13 | 0.82, 1.54 | 0.46 | 0.91 | 0.73, 1.13 | 0.40 | 0.97 | 0.80, 1.17 | 0.73 |
M4: M2 + chorioamnionitisf | |||||||||
<18.5 | 0.93 | 0.51, 1.69 | 0.81 | 1.48 | 1.04, 2.10 | 0.03 | 1.32 | 0.96, 1.82 | 0.09 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 1.12 | 0.87, 1.43 | 0.39 | 0.99 | 0.83, 1.20 | 0.95 | 1.03 | 0.88, 1.21 | 0.73 |
≥ 30.0 | 1.58 | 1.22, 2.05 | 0.001 | 0.91 | 0.73, 1.12 | 0.37 | 1.12 | 0.93, 1.34 | 0.23 |
M5: M2 + gestational diabetesf | |||||||||
<18.5 | 0.96 | 0.53, 1.75 | 0.90 | 1.42 | 1.00, 2.01 | 0.05 | 1.31 | 0.95, 1.80 | 0.10 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 1.06 | 0.82, 1.36 | 0.66 | 0.96 | 0.79, 1.15 | 0.63 | 0.98 | 0.84, 1.15 | 0.83 |
≥ 30.0 | 1.40 | 1.08, 1.83 | 0.01 | 0.86 | 0.69, 1.07 | 0.16 | 1.03 | 0.85, 1.23 | 0.78 |
Grand model | |||||||||
M6: M2 + hypertensive disorders of pregnancye + chorioamnionitisf + gestational diabetesg | |||||||||
<18.5 | 1.21 | 0.61, 2.39 | 0.58 | 1.51 | 1.06, 2.15 | 0.02 | 1.45 | 1.04, 2.02 | 0.03 |
18.5-24.9 (ref) | 1.00 | 1.00 | 1.00 | ||||||
25.0-29.9 | 0.94 | 0.70, 1.27 | 0.69 | 0.95 | 0.79, 1.15 | 0.60 | 0.95 | 0.80, 1.12 | 0.54 |
≥ 30.0 | 1.08 | 0.78, 1.49 | 0.65 | 0.86 | 0.69, 1.07 | 0.17 | 0.92 | 0.75, 1.11 | 0.38 |