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Table 2 Maternal and infant characteristics according to whether or not the child was diagnosed with cerebral palsy

From: Prelabor rupture of membranes and the association with cerebral palsy in term born children: a national registry-based cohort study

 Cerebral palsy
YesNo 
N(%)N(%) 
Number of births551(100)559,421(100)P-value
Maternal agec
  < 1918(3.3)13,070(2.3) 
 20–34421(76)454,117(81) 
  > 35112(20)92,207(17)0.096a
Parity
 Para 0270(49)226,537(41) 
  > 0 Para281(51)332,884(60)< 0.001b
Any maternal diagnosis before pregnancy245(45)232,001(42)0.15b
Any maternal diagnosis during pregnancy177(32)164,254(29)0.16b
Diabetes mellitusd
 Diagnosed before pregnancy4(0.7)3052(0.5) 
 Gestational2(0.4)5120(0.9)0.34b
Thyroid disease9(1.6)7839(1.4)0.64b
Recurrent urinary tract infection15(2.7)17,721(3.2)0.55b
Chronic kidney disease2(0.4)3043(0.5)0.56b
In vitro fertilizatione12(2.2)8272(1.5)0.17b
Presentationf
 Cephalic493(91)513,578(92) 
 Abnormal51(9)42,022(8)0.11b
Induction90(16)68,197(12)0.003b
Caesarean sectiong
 Elective23(4)30,151(5) 
 Acute129(23)42,489(8) 
 No399(72)485,939(87)< 0.001b
Sex
 Male313(57)284,929(51) 
 Female238(43)274,492(49)0.006b
Small for gestational age33(6)7881(1.4)< 0.001b
Apgar after 5 minutesh
 0–352(10)1662(0.3) 
 4–661(11)3830(0.7) 
 7–10435(7)552,687(99)< 0.001a
  1. a Linear-by-linear test for association
  2. b Pearson Chi-Square
  3. c Information on maternal age was missing in 27 of the children without CP
  4. d Information on diabetes mellitus was missing in 1 of the CP children, and 315 of the children without CP
  5. e Information on IVF was missing in 1 of the CP children and 875 of the children without CP
  6. f Information on presentation was missing in 7 of the CP children and 3821 of the children without CP
  7. g Information on Caesarean section was missing in 842 of the children without CP
  8. h Information on Apgar was missing in 3 of the CP children and 1242 of the children without CP