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Table 1 Demographic characteristics, Ontario birth cohort Apr 2006- Nov 2012, children with carrier status for HbS, HbC, HbD, or HbE versus children with screen negative newborn screening results

From: Health services use by children identified as heterozygous hemoglobinopathy mutation carriers via newborn screening

  Carriers
N = 4987 n (%)
Matched population controls
N = 24,935 n (%)
Sexa
 Male 2472 (50) 12,646 (51)
 Female 2515 (50) 12,289 (49)
Birth weighta
  < 2500 g 410 (8) 1665 (7)
  ≥ 2500 g 4549 (92) 23,138 (93)
Gestational agea
  < 37 weeks 428 (9) 1920 (8)
  ≥ 37 weeks 4490 (91) 22,433 (92)
Socioeconomic statusa
  ‘Lower’ 2992 (60) 13,679 (55)
  ‘Higher’ 1960 (40) 11,220 (45)
Survival (to end-study)
 Yes 4975 (99.8) 24,867 (99.7)
 No 12 (0.2) 68 (0.3)
  1. a Counts for some groups do not add to the total sample size due to missing values