Above or equal the 10th percentile by both curves n=58,523
Below the 10th percentile (SGA)
Below the 10th percentile (SGA)
Above or equal the 3rd percentile by both curves n=63,718
Below the 3rd percentile (FGR)
Below the 3rd percentile (FGR)
By WHO Alone n=4721 By both standards n=4705 By WHO Alone n=2799 By both standards n=1439
(IQR or %) (IQR or %) (IQR or %) (IQR or %) (IQR or %)
Gestational age (weeks)
39 (SD ± 1.66)
39.4 (SD ± 1.7)*
38.5 (SD ±2.7)
39 (SD ±1.7)
38.9 (SD ±2)
37.5 (SD ± 3.5)
Preterm delivery (<37 weeks)
4282 (7.3)
289 (6.1)*
769 (16.3)
4618 (7.25)
317 (11.3)
412 (28.6)
Route of delivery
Cesarean
27031 (46.2)
1779 (37.7)
2247 (47.8)
28978 (45.5)
1228 (43.9)
854 (59.4)
Instrumented
751 (1.3)
41 (0.9)
25 (0.5)
797 (1.3)
15 (0.5)
5 (0.4)
Vaginal
30730 (52.5)
2900 (61.4)
2432 (51.7)
33931 (53.3)
1556 (55.6)
579 (40.3)
Birth weight (grams) 3340 (3100 - 3610) 2866* (2690 - 3004) 2514 (2230 - 2710) 3300 (3020 - 3595) 2620 (2420 - 2790) 2180 (1783 - 2438)
WHO centile 52.4 (29.9 - 77.3) 8.16* (6.75 - 9.06) 0 (0 - 0) 48.3 (24.5 - 75.4) 0 (0 - 0) 0 (0 - 0)
IG-21st centile 63 (42.1 - 83) 14.6* (12.2 - 17.3) 5.1 (2.3 - 7.5) 59.1 (36.5 - 81.7) 6.2 (4.7 - 9.5) 1.2 (0.4 - 2.2)
Apgar score <7 at 5 minutes 270 (0.46) 19 (0.4) 71 (1.5) 302 (0.5) 23 (0.8) 38 (2.6)
Ponderal Index 26.7 (24.9 - 28.6) 24.5* (23 - 26) 23.5 (21.7 - 25.4) 26.5 (24.7 - 28.5) 23.7 (22.2 - 25.3) 22.5 (20.6 - 24.7)
Ponderal index <5th centile
584 (1)
224 (4.7)*
561 (11.9)
841 (1.3)
245 (8.7)
283 (19.7)
Cephalization index 1 (0.9 - 1.1) 1.2 (1.1 - 1.2)* 1.3 (1.2 - 1.5) 1.04 (0.9 - 1.1) 1.26 (1.2 - 1.4) 1.48 (1.34 - 1.8)