Table 2 Association between gestational weight gain and adverse birth weights according to the IOM guidelines in total cohort
GWG | LGA | SGA | ||||
|---|---|---|---|---|---|---|
n (%) | Crude OR (95% CI) | Adjusted OR (95% CI) | n (%) | Crude OR (95% CI) | Adjusted OR (95% CI) | |
Overalla(n = 19,854) |  |  |  |  |  | |
Below | 183 (3.4) | 0.47 (0.39, 0.55) | 0.48 (0.40, 0.57) ** | 472 (8.7) | 1.67 (1.46, 1.91) | 1.63 (1.42, 1.86) ** |
Within | 571 (7.0) | 1.00 | 1.00 | 441 (5.4) | 1.00 | 1.00 |
Above | 838 (13.5) | 2.09 (1.87, 2.34) | 1.77 (1.57, 1.99) ** | 220 (3.6) | 0.65 (0.55, 0.76) | 0.72 (0.60, 0.85) * |
Underweightb(n = 1965) |  |  |  |  |  | |
Below | 5 (0.7) | 0.20 (0.07, 0.46) | 0.19 (0.07, 0.46) * | 110 (15.3) | 2.08 (1.53, 2.83) | 2.02 (1.48, 2.76) ** |
Within | 34 (3.4) | 1.00 | 1.00 | 79 (8.0) | 1.00 | 1.00 |
Above | 19 (7.5) | 2.26 (1.25, 4.00) | 2.32 (1.28, 4.11) * | 19 (7.5) | 0.93 (0.54, 1.53) | 0.92 (0.53, 1.51) |
Normal weightb(n = 12,477) |  |  |  |  |  | |
Below | 152 (3.6) | 0.51 (0.42, 0.62) | 0.49 (0.41, 0.60) ** | 316 (7.6) | 1.44 (1.22, 1.70) | 1.44 (1.22, 1.71) ** |
Within | 376 (6.9) | 1.00 | 1.00 | 293 (5.4) | 1.00 | 1.00 |
Above | 332 (11.7) | 1.78 (1.52, 2.08) | 1.81 (1.55, 2.11) ** | 98 (3.4) | 0.63 (0.49, 0.79) | 0.61 (0.48, 0.76) ** |
Overweight/Obeseb(n = 5412) |  |  |  |  |  | |
Below | 26 (4.7) | 0.50 (0.32, 0.74) | 0.47 (0.30, 0.71) * | 46 (8.4) | 2.24 (1.52, 3.29) | 2.32 (1.55, 3.44) ** |
Within | 161 (9.1) | 1.00 | 1.00 | 69 (3.9) | 1.00 | 1.00 |
Above | 487 (15.8) | 1.87 (1.55, 2.26) | 1.94 (1.60, 2.36) ** | 103 (3.3) | 0.85 (0.62, 1.16) | 0.76 (0.56, 1.05) |