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Table 2 Neonatal hospitalization rate by gestational age (GA) and sex among 696 698 singleton live-born babies ≥ 32 weeks of gestation (France, 2011)

From: Gestational age and 1-year hospital admission or mortality: a nation-wide population-based study

GA All babies Boys Girls Sex-ratioa
Number (%) Number (%) Number (%)  
32 1638 (94.1) 910 (94.7) 728 (93.3) 1.25
33 2394 (94.7) 1328 (94.9) 1066 (94.4) 1.25
34 4146 (91.1) 2225 (91.3) 1921 (90.8) 1.16
35 5695 (71.5) 3105 (71.8) 2590 (71.2) 1.20
36 5890 (36.7) 3248 (37.5) 2642 (35.6) 1.23
37 5925 (15.0) 3242 (15.5) 2683 (14.4) 1.21
38 9208 (8.8) 4926 (9.1) 4282 (8.4) 1.15
39 12 358 (6.4) 6859 (7.1) 5499 (5.8) 1.25
40 11 876 (6.1) 6437 (6.7) 5439 (5.5) 1.18
41 8486 (6.7) 4636 (7.3) 3850 (6.1) 1.20
42 431 (7.6) 236 (7.9) 195 (7.2) 1.21
43 20 (8.8) 13 (10.1) 7 (7.1) 1.86
Total 68 067 (9.8) 37 165 (10.5) 30 902 (9.0) 1.20
  1. p (Chi Square) = 0.2461: no significant difference for the distribution of sex according to gestational age
  2. p (Somer’s D) < 0.0001: significant trend for the sex-ratio according to gestational age
  3. asex-ratio = number of hospitalized boys/number of hospitalized girls