Table 1

GA categories and the distribution of singleton births throughout the study periods (12 March–14 April 2015–2020); the distribution of births permille, by GA category for the lockdown period (12 March–14 April 2020) compared with consolidated data from 12 March–14 April 2015–2019

GA201520162017201820192020Prevalence (permille)OR95% CIP value
Weeks+daysMean
(SD)
N
(%)
N
(%)
N
(%)
N
(%)
N
(%)
N
(%)
2015–2019
(SD)
2020
Extremely premature≤27+625.7 (1.31)13 (0.27)9 (0.17)9 (0.17)13 (0.24)13 (0.25)1 (0.02)2.19 (0.47)0.190.090.01 to 0.40<0.001
Very premature28+0–31+629.7 (1.07)27 (0.56)32 (0.60)31 (0.59)28 (0.52)27 (0.52)32 (0.62)5.57 (0.36)6.201.110.75 to 1.610.589
Moderate/late premature32+0–36+634.9 (1.26)203 (4.19)224 (4.20)235 (4.44)215 (3.98)238 (4.62)216 (4.18)42.85 (2.45)41.840.980.84 to 1.130.742
Term37+0–41+639.6 (1.15)4512 (93.20)4936 (92.59)4914 (92.82)5023 (93.05)4752 (92.20)4810 (93.18)927.70 (3.96)931.811.060.95 to 1.200.293
Late term≥42+042.0 (0.16)86 (1.78)130 (2.44)105 (1.98)119 (2.20)124 (2.41)103 (2.00)21.68 (2.82)19.950.920.74 to 1.130.430
Totalall births39.4 (1.81)4841 (100)5331 (100)5294 (100)5398 (100)5154 (100)5162 (100)10001000
  • GA, gestational age.