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Table 3 Risks and risk differences for epilepsy hospitalization according to 5-minute Apgar score and other characteristics.

From: Apgar score and hospitalization for epilepsy in childhood: a registry-based cohort study

Characteristic Risk per 100 persons (no. of cases) Risk difference, cases per100 (95% CI)
  Overall Apgar score <7 Apgar score ≥ 7, reference  
Entire cohort 0.8 (815) 3.3 (27) 0.8 (788) 2.5 (1.3 to 3.8)
Birth weight
   ≤2500 g 1.7 (70) 3.2 (5) 1.6 (65) 1.6 (-1.2 to 4.5)
   2501–3000 g 1.0 (133) 5.5 (6) 0.9 (127) 4.5 (0.1 to 8.9)
   3001–3500 g 0.8 (275) 3.7 (7) 0.8 (268) 2.9 (0.2 to 5.6)
   3501–4000 g 0.7 (228) 1.4 (3) 0.7 (225) 0.8 (-0.9 to 2.4)
   ≥4001 g 0.7 (106) 3.8 (4) 0.7 (102) 3.2 (-0.6 to 6.9)
Gestational age
   <28 weeks 1.6 (1) 0 (0) 1.9 (1) -1.9 (-5.5 to 1.8)
   28–36 weeks 1.4 (55) 2.9 (4) 1.3 (51) 1.6 (-1.3 to 4.4)
   37–42 weeks 0.7 (684) 2.5 (14) 0.7 (670) 1.7 (0.4 to 3.0)
   >42 weeks 0.9 (20) 19.3 (4) 0.7 (16) 18.6 (-0.3 to 37.6)
Mode of delivery
   Spontaneous 0.7 (621) 3.0 (13) 0.7 (608) 2.2 (0.6 to 3.9)
   Assisted 0.9 (68) 4.4 (6) 0.8 (62) 3.6 (0.1 to 7.1)
   Caesarean 1.1 (125) 2.9 (7) 1.1 (118) 1.9 (-0.3 to 4.0)
Birth presentation
   Cephalic 0.7 (662) 3.0 (16) 0.7 (646) 2.3 (0.8 to 3.8)
   All other 1.1 (129) 3.7 (9) 1.1 (120) 2.6 (0.2 to 5.0)
Birth defects
   Absent 0.7 (639) 2.8 (20) 0.7 (619) 2.2 (0.9 to 3.4)
   Present 2.3 (176) 6.5 (7) 2.2 (169) 4.2 (-0.6 to 9.0)
Mother's age at delivery
   ≤20 years 1.1 (72) 3.4 (2) 1.1 (70) 2.3 (-2.4 to 7.1)
   21–30 years 0.8 (572) 3.1 (17) 0.8 (555) 2.3 (0.9 to 3.8)
   ≥31 years 0.7 (171) 3.9 (8) 0.7 (163) 3.2 (0.5 to 5.9)
Mother smoked in pregnancy*
   No 0.6 (141) 2.4 (6) 0.6 (135) 1.8 (-0.1 to 3.7)
   Yes 1.0 (99) 6.3 (6) 0.9 (93) 5.3 (0.3 to 10.4)
Parental epilepsy hospitalization#
   No 0.8 (122) 5.9 (7) 0.8 (115) 5.1 (0.7 to 9.4)
   Yes 1.9 (3) 37.4 (1) 1.3 (2) 36.1 (-37.1 to 109.4)
  1. * Births after 1990, N = 62,799. # Births after 1994, N = 38,771.