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Table 1 Gestational age (GA) in relation to sex ratio and neonatal outcomes among 1,973,767 singleton live births

From: Neonatal outcomes in relation to sex differences: a national cohort survey in Taiwan

GA (w) Total Neonatal death Congenital anomaly Low birth weight Macrosomia
Male (n) Female (n) Sex ratio % Sex ratio % Sex ratio % Sex ratio % Sex ratio
≤24 804 666 1.207 77.48 1.320* 15.99 1.136 100 1.207 0.00
25 386 285 1.354 47.24 1.331 5.07 0.700* 100 1.354 0.00
26 455 316 1.440 31.00 1.276 4.67 1.118 100 1.440 0.00
27 540 438 1.233 22.29 1.396 3.48 0.789 100 1.233 0.00
28 683 534 1.279 14.71 1.594 3.12 0.652* 100 1.279 0.00
29 791 580 1.364 9.34 1.909 2.70 0.947 100 1.364 0.00
30 1145 881 1.300 5.92 1.400 2.86 1.148 99.70 1.298 0.00
31 1405 1032 1.361 4.10 1.273 2.95 1.483 98.89 1.358 0.00
32 2218 1581 1.403 2.21 1.270 2.47 1.410 95.97 1.408 0.00
33 3388 2371 1.429 1.96 1.457 1.86 1.432 88.82 1.384* 0.00
34 6298 4656 1.353 1.52 1.169 1.53 1.000* 72.08 1.222* 0.09 2.333
35 14,090 10,293 1.369 0.78 1.436 1.22 1.339 44.89 1.084* 0.32 1.026
36 42,246 31,262 1.351 0.35 1.421 0.79 1.750* 21.14 0.910* 0.64 1.597
37 139,442 109,431 1.274 0.17 1.434 0.56 1.455* 7.61 0.740* 0.99 1.876*
38 295,342 253,577 1.165 0.11 1.557* 0.45 1.521* 3.28 0.643* 1.45 2.173*
39 291,920 279,557 1.044 0.09 1.309* 0.43 1.394* 1.73 0.536* 2.18 2.053*
40 189,884 198,222 0.958 0.09 0.955 0.46 1.250* 0.96 0.521* 3.70 1.821*
41 38,268 42,722 0.896 0.13 0.946 0.59 1.154* 0.69 0.508* 5.65 1.669*
≥42 2933 3125 0.939 0.25 1.143 0.79 1.000 1.29 0.560* 8.40 1.495*
Total 1,032,238 941,529 1.096 0.27 1.341* 0.53 1.379* 5.31 0.863* 2.17 1.922*
  1. *p < 0.05