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

Number of births

551

(100)

559,421

(100)

P-value

  < 19

18

(3.3)

13,070

(2.3)

 20–34

421

(76)

454,117

(81)

  > 35

112

(20)

92,207

(17)

0.096^a

 Para 0

270

(49)

226,537

(41)

  > 0 Para

281

(51)

332,884

(60)

< 0.001^b

Any maternal diagnosis before pregnancy

245

(45)

232,001

(42)

0.15^b

Any maternal diagnosis during pregnancy

177

(32)

164,254

(29)

0.16^b

 Diagnosed before pregnancy

4

(0.7)

3052

(0.5)

 Gestational

2

(0.4)

5120

(0.9)

0.34^b

Thyroid disease

9

(1.6)

7839

(1.4)

0.64^b

Recurrent urinary tract infection

15

(2.7)

17,721

(3.2)

0.55^b

Chronic kidney disease

2

(0.4)

3043

(0.5)

0.56^b

In vitro fertilization^e

12

(2.2)

8272

(1.5)

0.17^b

 Cephalic

493

(91)

513,578

(92)

 Abnormal

51

(9)

42,022

(8)

0.11^b

Induction

90

(16)

68,197

(12)

0.003^b

 Elective

23

(4)

30,151

(5)

 Acute

129

(23)

42,489

(8)

 No

399

(72)

485,939

(87)

< 0.001^b

 Male

313

(57)

284,929

(51)

 Female

238

(43)

274,492

(49)

0.006^b

Small for gestational age

33

(6)

7881

(1.4)

< 0.001^b

 0–3

52

(10)

1662

(0.3)

 4–6

61

(11)

3830

(0.7)

 7–10

435

(7)

552,687

(99)

< 0.001^a