Table 2 Crude and adjusted odds ratio for macrosomia among singleton live births at ≥37 weeks of gestation
From: Secular trends of macrosomia in southeast China, 1994-2005
| Â | No. births | Macrosomia (%) | Crude OR (95% CI) | Adjusted OR (95% CI) |
|---|---|---|---|---|
Maternal age at delivery(y) | Â | Â | Â | Â |
   ≤24 | 293, 199 | 6.26 | 0.78(0.76-0.80) | 0.86(0.84-0.88) |
   25-29 | 226, 064 | 7.90 | 1.00 | 1.00 |
   30-34 | 65, 066 | 10.84 | 1.42(138-1.46) | 1.19(1.15-1.24) |
   ≥35 | 9, 840 | 11.19 | 1.47(1.38-1.57) | 1.17(1.09-1.25) |
Maternal education | Â | Â | Â | Â |
   College or above | 47, 738 | 8.58 | 1.21(1.16-1.26) | 1.26(1.21-1.32) |
   High school | 128, 739 | 7.78 | 1.08(1.05-1.12) | 1.21(1.16-1.25) |
   Junior school | 336, 372 | 7.25 | 1.01(0.98-1.04) | 1.12(1.09-1.16) |
   Elementary school or less | 78, 751 | 7.23 | 1.00 | 1.00 |
Gestational age(wk) | Â | Â | Â | Â |
   37 | 31, 142 | 2.40 | 0.25(0.23-0.27) | 0.24(0.22-0.25) |
   38 | 85, 294 | 3.77 | 0.40(0.38-0.42) | 0.37(0.36-0.39) |
   39 | 176, 667 | 6.17 | 0.67(0.66-0.69) | 0.64(0.63-0.66) |
   40 | 182, 353 | 8.93 | 1.00 | 1.00 |
   41 | 87, 709 | 11.20 | 1.29(1.25-1.32) | 1.33(1.30-1.37) |
   ≥42 | 31, 307 | 10.95 | 1.26(1.21-1.30) | 1.35(1.30-1.41) |
Infant gender | Â | Â | Â | Â |
   Female | 285, 406 | 5.38 | 1.00 | 1.00 |
   Male | 309, 066 | 9.39 | 1.82(1.79-1.86) | 1.95(1.91-1.99) |
Maternal height(cm) | Â | Â | Â | Â |
   ≤156 | 146, 228 | 4.52 | 0.62(0.61-0.64) | 0.65(0.63-0.67) |
   157-161 | 253, 852 | 7.03 | 1.00 | 1.00 |
   ≥162 | 168, 450 | 10.69 | 1.57(1.54-1.61) | 1.56(1.52-1.59) |
Maternal BMI(kg/m 2 ) | Â | Â | Â | Â |
   < 18.5 | 109, 810 | 3.89 | 0.52(0.50-0.53) | 0.47(0.46-0.49) |
   18.5-22.9 | 354, 411 | 7.31 | 1.00 | 1.00 |
   23-24.9 | 52, 635 | 12.09 | 1.75(1.70-1.80) | 1.92(1.87-1.98) |
   ≥25 | 24, 455 | 16.71 | 2.56(2.47-2.65) | 3.04(2.92-3.16) |
Net gestational weight gain (kg) | Â | Â | Â | Â |
   < 6.5 | 134, 078 | 5.44 | 0.77(0.75-0.79) | 0.62(0.60-0.64) |
   6.5-12.5 | 256, 502 | 6.82 | 1.00 | 1.00 |
   > 12.5 | 138, 515 | 10.66 | 1.60(157-1.63) | 1.72(1.68-1.76) |
Parity | Â | Â | Â | Â |
   0 | 508, 436 | 6.90 | 1.00 | 1.00 |
   1 | 80, 236 | 10.78 | 1.63(1.59-1.67) | 1.51(1.46-1.56) |
   ≥2 | 5, 056 | 11.75 | 1.80(1.65-1.96) | 1.70(1.55-1.87) |
Maternal residence | Â | Â | Â | Â |
   City | 184, 341 | 8.36 | 1.20(1.18-1.23) | 1.08(1.06-1.11) |
   country | 410, 131 | 7.07 | 1.00 | 1.00 |