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Table 7 Mean birth weight, standard deviation, Ponderal index and classification by birth order and gestational age

From: Reference curves of birth weight, length, and head circumference for gestational ages in Yogyakarta, Indonesia

GA (w) First child Later children p First child Later children
No of cases Mean (g) SD No of cases Mean (g) SD PI C PI C
26 48 723.6 173.7 55 730.7 148.8 0.83 2.0 L 1.9 L
27 40 832.8 145.3 40 877.5 160.8 0.18 2.2 L 2.3 L
28 60 951.6 139.1 49 961.3 132.2 0.71 2.1 L 2.1 L
29 56 1041 107.7 38 1043 175.3 0.94 2.0 L 2.0 L
30 57 1199 203.6 62 1214 232.6 0.70 2.1 L 2.0 L
31 84 1413 315.6 79 1372 254.2 0.37 2.0 L 2.0 L
32 214 1698 393.4 180 1720 421.0 0.58 2.2 L 2.2 L
33 228 1689 407.1 241 1757 443.7 0.083 2.3 L 2.3 L
34 508 1874 386.2 357 1917 414.8 0.12 2.3 L 2.4 L
35 628 2034 361.9 428 2049 410.4 0.54 2.4 L 2.4 L
36 906 2328 390.9 774 2396 477.6 0.002 2.4 L 2.5 A
37 1525 2569 381.3 1435 2669 440.7 <0.001 2.5 A 2.6 A
38 3510 2783 361.3 3607 2883 414.7 <0.001 2.6 A 2.7 A
39 6159 2983 359.5 6821 3083 389.7 <0.001 2.7 A 2.7 A
40 7527 3075 377.2 8835 3204 418.0 <0.001 2.7 A 2.8 A
41 3289 3246 443.1 3777 3370 445.8 <0.001 2.8 A 2.9 H
42 1350 3199 440.7 1632 3297 466.9 <0.001 2.7 A 2.8 A
  1. C Classification; L Low; A Average; H High; GA Gestational Age; SD Standard Deviation; P Percentiles; g gram; w week