Table 3 Association between rate of GWG and PTB – stratified by trimestera
GWG rate (kg/week) | Preterm birth N (%) | Crude OR (95 % CI) | Adjusted OR (95 % CI) |
|---|---|---|---|
Categoryb | |||
2nd trimester (N = 16978) | |||
Insufficient | 119 (3.6) | 1.16 (0.91,1.49) | 1.11 (0.87,1.43) |
Adequate | 141 (3.1) | reference | reference |
Excessive | 330 (3.6) | 1.16 (0.95,1.41) | 1.11 (0.91,1.37) |
3rd trimester (N = 16888) | |||
Insufficient | 131 (3.2) | 1.17 (0.91,1.51) | 1.12 (0.87,1.44) |
Adequate | 117 (2.7) | reference | reference |
Excessive | 302 (3.6) | 1.31 (1.05,1.63) | 1.27 (1.02,1.58) |