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Table 4 Neonatal admission (d1-d28) to any neonatal care unit, according to gestational age (GA) among 696 698 singleton live-born babies (France, 2011) (N = 56 016–8.0%)

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

GA Hospitalized babies RR [95% CI]a aRR [95% CI]b
Number (%)   
32 1632 (93.7) 20.6 [18.8–22.5] 21.1 [19.2–23.2]
33 2388 (94.4) 20.8 [19.0–22.8] 21.2 [19.4–23.2]
34 4132 (90.8) 19.3 [17.7–21.0] 19.7 [18.1–21.5]
35 5629 (70.7) 14.4 [13.3–15.6] 14.7 [13.6–15.9]
36 5581 (34.7) 7.1 [6.6–7.6] 7.2 [6.7–7.7]
37 5033 (12.7) 2.7 [2.5–2.8] 2.7 [2.6–2.9]
38 7104 (6.7) 1.5 [1.4–1.6] 1.5 [1.4–1.6]
39 8981 (4.7) 1.0 [1.0–1.1] 1.0 [1.0–1.1]
40 8652 (4.4)
41 6529 (5.2) 1.2 [1.1–1.2] 1.2 [1.1–1.2]
42 336 (5.9) 1.3 [1.2–1.5] 1.4 [1.2–1.6]
43 19 (8.4) 1.5 [0.7–3.5] 1.6 [0.7–3.6]
Total 56 016 (8.0)   
  1. p (Somer’s D) < 0.001: significant trend for neonatal admission according to gestational age
  2. aRR: relative risk
  3. baRR: relative risk adjusted for sex and pregnancy-related diseases (ICD10 codes P01 and P02)