From: Secular trends of macrosomia in southeast China, 1994-2005
Variables | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2002 | 2003 | 2004 | 2005 |
---|---|---|---|---|---|---|---|---|---|---|---|
No. of Newborns | 64, 986 | 67, 353 | 58, 548 | 58, 854 | 53, 011 | 49, 102 | 54, 208 | 45, 104 | 42, 566 | 53, 103 | 47, 637 |
Male (%)* | 52.03 | 51.58 | 51.67 | 51.71 | 51.67 | 51.60 | 51.80 | 52.54 | 52.54 | 52.81 | 52.30 |
Nulliparity (%)* | 84.32 | 84.54 | 82.80 | 83.95 | 84.24 | 85.93 | 86.15 | 87.94 | 88.76 | 88.52 | 87.00 |
Gestational age(d, mean ± SD)# | 280.38 ± 9.21 | 280.81 ± 9.10 | 280.63 ± 9.02 | 280.04 ± 8.72 | 280.00 ± 8.60 | 280.07 ± 8.42 | 279.82 ± 8.31 | 278.39 ± 8.04 | 278.25 ± 7.96 | 278.49 ± 7.86 | 278.15 ± 7.87 |
Gestational age distribution (%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
37 weeks | 5.60 | 4.93 | 5.01 | 5.28 | 5.13 | 4.76 | 4.66 | 5.92 | 5.73 | 5.19 | 5.64 |
38 weeks | 13.91 | 12.80 | 13.01 | 13.49 | 13.50 | 12.92 | 13.41 | 16.53 | 16.99 | 16.22 | 16.81 |
39 weeks | 26.58 | 26.43 | 26.84 | 28.33 | 28.15 | 28.88 | 29.72 | 33.05 | 33.6 | 34.19 | 34.90 |
40 weeks | 29.59 | 30.21 | 30.44 | 30.94 | 32.00 | 32.34 | 32.60 | 29.82 | 29.81 | 30.23 | 29.48 |
41 weeks | 16.77 | 17.72 | 17.25 | 16.23 | 15.85 | 16.04 | 14.84 | 11.70 | 11.11 | 11.19 | 10.39 |
≥42 weeks | 7.55 | 7.90 | 7.46 | 5.73 | 5.37 | 5.05 | 4.77 | 2.98 | 2.76 | 2.98 | 2.78 |
Maternal age (%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
≤24 y | 58.24 | 54.45 | 50.61 | 46.39 | 44.59 | 46.23 | 47.38 | 50.34 | 49.22 | 46.70 | 44.96 |
25-29 y | 30.78 | 34.23 | 36.31 | 40.39 | 42.06 | 41.86 | 39.59 | 36.70 | 37.72 | 40.61 | 41.13 |
30-34 y | 10.10 | 10.41 | 12.16 | 12.09 | 11.71 | 10.12 | 11.10 | 10.81 | 10.63 | 10.29 | 10.98 |
≥35 y | 0.87 | 0.91 | 0.91 | 1.14 | 1.63 | 1.78 | 1.93 | 2.15 | 2.43 | 2.40 | 2.93 |
Maternal education (%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
College or above | 3.03 | 3.29 | 3.44 | 4.48 | 5.51 | 6.62 | 8.06 | 10.73 | 12.14 | 16.51 | 20.71 |
High school | 13.40 | 14.46 | 15.38 | 16.96 | 19.08 | 21.99 | 23.71 | 28.83 | 30.99 | 32.96 | 30.45 |
Junior school | 58.79 | 61.04 | 62.26 | 63.35 | 62.66 | 60.57 | 58.57 | 53.42 | 50.56 | 45.28 | 43.07 |
Elementary school or less | 24.77 | 21.20 | 18.92 | 15.21 | 12.75 | 10.82 | 9.66 | 7.01 | 6.31 | 5.25 | 5.77 |
Maternal height(%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
≤1.56 m | 27.98 | 26.47 | 26.96 | 26.16 | 26.37 | 25.85 | 25.56 | 25.02 | 24.59 | 23.39 | 23.61 |
1.57-1.61 m | 44.06 | 44.95 | 44.86 | 45.05 | 44.29 | 44.66 | 44.55 | 44.24 | 44.41 | 44.91 | 45.08 |
≥1.62 m | 27.95 | 28.58 | 28.18 | 28.79 | 29.34 | 29.48 | 29.89 | 30.74 | 31.00 | 31.69 | 31.31 |
Maternal BMI(%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
< 18.5 kg/m 2 | 19.07 | 20.44 | 19.61 | 21.22 | 20.48 | 20.61 | 20.90 | 20.64 | 20.87 | 19.00 | 18.88 |
18.5-22.9 kg/m 2 | 67.83 | 67.61 | 67.53 | 66.41 | 66.73 | 66.09 | 65.65 | 64.5 | 63.61 | 63.12 | 61.54 |
23-24.9 kg/m 2 | 9.85 | 8.81 | 9.39 | 8.93 | 9.09 | 9.29 | 9.38 | 9.72 | 10.08 | 11.04 | 11.77 |
≥25 kg/m 2 | 3.26 | 3.14 | 3.47 | 3.44 | 3.71 | 4.00 | 4.07 | 5.15 | 5.44 | 6.84 | 7.82 |
Net gestational weght gain(Kg, mean ± SD)# | 7.80 ± 4.80 | 8.75 ± 4.81 | 8.66 ± 4.69 | 9.35 ± 4.67 | 9.66 ± 4.65 | 10.13 ± 4.63 | 10.22 ± 4.59 | 10.11 ± 4.86 | 10.32 ± 5.01 | 10.05 ± 5.28 | 10.09 ± 5.44 |
Net gestational weight gain (%)* | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
< 6.5 kg | 38.44 | 31.13 | 31.55 | 25.83 | 23.38 | 20.43 | 19.43 | 20.62 | 19.82 | 21.41 | 21.59 |
6.5~12.5 kg | 46.04 | 48.34 | 48.54 | 50.52 | 50.57 | 50.45 | 50.57 | 49.19 | 47.47 | 46.87 | 45.28 |
> 12.5 kg | 15.52 | 20.53 | 19.91 | 23.65 | 26.06 | 29.12 | 30.00 | 30.2 | 32.71 | 31.72 | 33.13 |
City (%)* | 21.87 | 24.86 | 23.95 | 29.36 | 31.31 | 32.72 | 35.36 | 33.4 | 36.21 | 38.27 | 40.84 |