Background
Methods
Data source
Patient and public involvement
Data analysis
Centile estimation
Comparison to Chinese ‘national reference’
Results
Creation of centiles
Very preterm (< 32 weeks) | Late-moderate preterm (32–36 weeks) | Term (> 36 weeks) | All gestational ages (28–42 weeks) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Expecteda | Observed % (n): males (n = 852) | Observed % (n): females (n = 687) | Observed % (n): both sexes (n = 1539) | Observed % (n): males (n = 11,037) | Observed % (n): females (n = 9040) | Observed % (n): both sexes (n = 20,077) | Observed % (n): males (n = 164,513) | Observed % (n): females (n = 152,325) | Observed % (n): both sexes (n = 316,838) | Observed % (n): males (n = 176,402) | Observed % (n): females (n = 162,052) | Observed % (n): both sexes (n = 338,454) |
Below 0.4th (0.38%) | 0.35 | 0.58 | 0.45 | 0.72 | 0.73 | 0.73 | 0.52 | 0.56 | 0.54 | 0.54 | 0.57 | 0.55 |
Below 2nd (2.28%) | 2.35 | 2.62 | 2.47 | 2.84 | 2.54 | 2.71 | 2.34 | 2.24 | 2.29 | 2.37 | 2.26 | 2.31 |
Below 9th (9.13%) | 8.22 | 8.88 | 8.51 | 8.82 | 8.48 | 8.67 | 8.06 | 8.35 | 8.20 | 8.11 | 8.36 | 8.23 |
Below 25th (25.24%) | 23.12 | 21.69 | 22.48 | 23.90 | 23.05 | 23.52 | 25.19 | 24.47 | 24.84 | 25.10 | 24.37 | 24.75 |
Below 50th (50%) | 48.94 | 49.78 | 49.32 | 50.02 | 50.61 | 50.29 | 49.73 | 50.74 | 50.22 | 49.75 | 50.73 | 50.22 |
Below 75th (74.76%) | 78.17 | 78.17 | 78.17 | 76.27 | 76.68 | 76.46 | 75.67 | 75.40 | 75.54 | 75.72 | 75.48 | 75.61 |
Below 91st (90.87%) | 93.08 | 92.43 | 92.79 | 92.15 | 91.45 | 91.84 | 90.90 | 91.11 | 91.00 | 90.99 | 91.13 | 91.06 |
Below 98th (97.72%) | 97.18 | 97.53 | 97.34 | 97.44 | 97.16 | 97.32 | 97.52 | 97.50 | 97.51 | 97.52 | 97.48 | 97.50 |
Below 99.6th (99.62%) | 98.94 | 99.27 | 99.09 | 99.24 | 99.12 | 99.18 | 99.46 | 99.49 | 99.47 | 99.44 | 99.46 | 99.45 |
Rural urban differences
Males | Females | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Gestation (complete weeks) | Urban | Rural | Urban | Rural | ||||||||
Weight (g) at 10th centile | Weight (g) at 50th centile | Weight (g) at 90th centile | Weight (g) at 10th centile | Weight (g) at 50th centile | Weight (g) at 90th centile | Weight (g) at 10th centile | Weight (g) at 50th centile | Weight (g) at 90th centile | Weight (g) at 10th centile | Weight (g) at 50th centile | Weight (g) at 90th centile | |
28 + 0–28 + 6 | 919 | 1191 | 1421 | 1172 | 1402 | 1650 | 847 | 1120 | 1363 | 1089 | 1343 | 1619 |
29 + 0–29 + 6 | 1034 | 1341 | 1605 | 1271 | 1530 | 1808 | 943 | 1238 | 1506 | 1164 | 1438 | 1735 |
30 + 0–30 + 6 | 1157 | 1497 | 1796 | 1373 | 1663 | 1974 | 1060 | 1384 | 1684 | 1259 | 1560 | 1887 |
31 + 0–31 + 6 | 1288 | 1664 | 2002 | 1485 | 1809 | 2157 | 1193 | 1552 | 1891 | 1370 | 1705 | 2069 |
32 + 0–32 + 6 | 1436 | 1848 | 2226 | 1608 | 1971 | 2360 | 1341 | 1740 | 2123 | 1498 | 1869 | 2273 |
33 + 0–33 + 6 | 1605 | 2051 | 2470 | 1752 | 2152 | 2579 | 1511 | 1947 | 2375 | 1639 | 2052 | 2501 |
34 + 0–34 + 6 | 1799 | 2271 | 2726 | 1915 | 2349 | 2812 | 1699 | 2168 | 2638 | 1800 | 2250 | 2740 |
35 + 0–35 + 6 | 2019 | 2507 | 2989 | 2102 | 2563 | 3054 | 1904 | 2393 | 2891 | 1979 | 2451 | 2965 |
36 + 0–36 + 6 | 2270 | 2763 | 3261 | 2321 | 2797 | 3303 | 2137 | 2626 | 3133 | 2179 | 2660 | 3181 |
37 + 0–37 + 6 | 2549 | 3034 | 3536 | 2565 | 3045 | 3555 | 2420 | 2897 | 3399 | 2432 | 2908 | 3423 |
38 + 0–38 + 6 | 2792 | 3265 | 3763 | 2777 | 3254 | 3761 | 2691 | 3149 | 3636 | 2668 | 3136 | 3640 |
39 + 0–39 + 6 | 2952 | 3408 | 3896 | 2897 | 3375 | 3883 | 2843 | 3285 | 3761 | 2791 | 3248 | 3740 |
40 + 0–40 + 6 | 3051 | 3502 | 3994 | 2968 | 3447 | 3958 | 2940 | 3380 | 3859 | 2859 | 3321 | 3821 |
41 + 0–41 + 6 | 3132 | 3581 | 4078 | 3014 | 3504 | 4029 | 3022 | 3466 | 3956 | 2909 | 3383 | 3898 |
42 + 0–42 + 6 | 3193 | 3641 | 4147 | 3044 | 3542 | 4079 | 3075 | 3518 | 4014 | 2930 | 3411 | 3936 |