Table 2.
Geometric means of estimated fetal weight by gestational week GW) and ratios of the geometric means across the comparison groups in women with normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and gestational diabetes (GDM) in the NICHD Fetal Growth Studies-Singletons
| GW | Geometric means, g (95% CI) | Ratios of geometric means (95% CI)a | |||
|---|---|---|---|---|---|
| NGT (n=2,020) | IGT (n=118) | GDM (n=107) | IGT: NGT | GDM: NGT | |
| 10 | 35 (35, 36) | 34 (32, 36) | 38 (36, 41) | 0.97 (0.91, 1.03) | 1.09 (1.02, 1.17) |
| 12 | 55 (55, 55) | 54 (53, 56) | 55 (54, 57) | 0.99 (0.96, 1.02) | 1.01 (0.98, 1.04) |
| 14 | 88 (87, 88) | 88 (85, 90) | 86 (84, 88) | 1.00 (0.97, 1.03) | 0.98 (0.95, 1.01) |
| 16 | 140 (139, 140) | 140 (136, 144) | 137 (134, 141) | 1.00 (0.97, 1.03) | 0.98 (0.96, 1.01) |
| 18 | 218 (217, 219) | 218 (213, 224) | 217 (211, 223) | 1.00 (0.98, 1.03) | 1.00 (0.97, 1.03) |
| 20 | 327 (325, 329) | 327 (319, 336) | 328 (319, 337) | 1.00 (0.98, 1.03) | 1.00 (0.98, 1.03) |
| 22 | 470 (468, 473) | 472 (461, 484) | 474 (462, 487) | 1.00 (0.98, 1.03) | 1.01 (0.98, 1.04) |
| 24 | 653 (650, 656) | 658 (642, 674) | 661 (644, 679) | 1.01 (0.98, 1.03) | 1.01 (0.99, 1.04) |
| 26 | 879 (875, 884) | 889 (868, 911) | 897 (873, 922) | 1.01 (0.99, 1.04) | 1.02 (0.99, 1.05) |
| 28 | 1156 (1150, 1162) | 1173 (1145, 1202) | 1193 (1161, 1226) | 1.01 (0.99, 1.04) | 1.03 (1.00, 1.06) |
| 30 | 1492 (1485, 1500) | 1518 (1482, 1555) | 1562 (1520, 1605) | 1.02 (0.99, 1.04) | 1.05 (1.02, 1.08) |
| 32 | 1883 (1873, 1893) | 1919 (1872, 1968) | 1994 (1938, 2051) | 1.02 (0.99, 1.05) | 1.06 (1.03, 1.09) |
| 34 | 2307 (2294, 2321) | 2359 (2299, 2420) | 2443 (2373, 2515) | 1.02 (1.00, 1.05) | 1.06 (1.03, 1.09) |
| 36 | 2734 (2718, 2751) | 2811 (2737, 2887) | 2858 (2771, 2947) | 1.03 (1.00, 1.06) | 1.05 (1.01, 1.08) |
| 38 | 3149 (3128, 3170) | 3281 (3188, 3376) | 3287 (3181, 3397) | 1.04 (1.01, 1.07) | 1.04 (1.01, 1.08) |
| 40 | 3556 (3518, 3595) | 3799 (3622, 3984) | 3862 (3664, 4072) | 1.07 (1.02, 1.12) | 1.09 (1.03, 1.15) |
| Global | 0.06 | <0.001 | |||
| P | |||||
a
Adjusted for race/ethnicity (white, black, Asian, Hispanic), age, parity, pre-pregnancy BMI (kg/m2) and infant sex (male, female).CI – confidence interval; NICHD - Eunice Kennedy Shriver National Institute of Child Health and Human Development.