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Table 5 Neonatal admission (d1-d28) to NICU, according to gestational age (GA) among 696 698 singleton live-born babies (France, 2011) (N = 5056 – 0.7%)

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 (%)   
32 614 (35.3) 100.1 [84.4–118.8] 98.3 [82.9–116.7]
33 501 (19.8) 58.5 [49.3–69.4] 57.0 [48.0–67.7]
34 544 (12.0) 33.3 [28–39.5] 32.6 [27.5–38.6]
35 458 (5.8) 17.1 [14.5–20.1] 17.0 [14.5–20]
36 419 (2.6) 8.1 [6.9–9.5] 8.1 [6.9–9.5]
37 389 (1.0) 3.0 [2.6–3.4] 3.0 [2.6–3.5]
38 467 (0.4) 1.4 [1.2–1.6] 1.4 [1.2–1.6]
39 565 (0.3) 0.9 [0.8–1.0] 0.9 [0.8–1.0]
40 618 (0.3)
41 449 (0.4) 1.1 [1.0–1.3] 1.1 [1.0–1.3]
42 28 (0.5) 1.7 [1.2–2.4] 1.7 [1.2–2.4]
43 4 (1.8) 6.6 [2.7–16.2] 6.9 [2.8–16.9]
Total 5056 (0.7)   
  1. p (Somer’s D) < 0.001: significant trend for NCIU 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)