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Table 2 Study population: characteristics and mode of delivery. Belgium 2001–2004.

From: Screening for inter-hospital differences in cesarean section rates in low-risk deliveries using administrative data: An initiative to improve the quality of care

  CS % Total   CS % Total
1) Maternal     2) Neonatal    
Age classes     Gender    
< 20 years 765 9.40 8,140 Boys 26,862 13.69 196,191
20–24 years 5,910 10.37 57,010 Girls 22,713 12.23 185,755
25–29 years 15,987 11.92 134,071 Undetermined 3   23
30–34 years 17,342 13.75 126,098 Birth weight    
35–39 years 7,746 16.27 47,613 2500–2999 g 9,444 13.78 68,511
40 years+ 1,828 20.18 9,057 3000–3499 g 20,431 12.18 167,699
Admission Day     3500–3999 g 15,119 12.89 117,250
Monday 9,560 14.84 64,422 4000–4499 g 4,584 16.07 28,529
Tuesday 8,827 13.80 63,948 Gestational age group    
Wednesday 8,780 14.22 61,762 37–38 weeks 18,531 18.77 98,712
Thursday 8,961 14.29 62,729 39–40 weeks 25,628 10.56 242,645
Friday 5,212 10.73 48,555 41–42 weeks 5,419 13.34 40,632
Saturday 2,441 7.21 33,836 1 min Apgar    
Sunday 5,797 12.40 46,737 Missing 10 16.13 62
Semester     < 4 1,141 21.61 5,281
2001-1 5,672 11.99 47,287 4 – 6 2,857 14.65 19,507
2001-2 5,975 12.43 48,058 > 6 45,570 12.76 357,139
2002-1 5,757 12.51 46,023 5 min Apgar    
2002-2 6,254 13.14 47,605 Missing 10 15.38 65
2003-1 6,161 13.27 46,421 < 4 163 21.73 750
2003-2 6,550 13.55 48,356 4 – 6 703 18.03 3,898
2004-1 6,319 13.24 47,734 > 6 48,702 12.91 377,276
2004-2 6,890 13.64 50,505 Respiratory Syndromes    
     RDS 480 31.27 1,535
     Wet lung 552 32.43 1,702
     Meconium Aspiration 510 19.23 2,652
     Intubation/Ventilation 959 27.88 3,440
     Congenital Anomaly 559 16.57 3,374
     Admission N*/NICU 9,850 15.31 64,326
  1. CS: number of cesarean sections carried out; %: proportion of the cesarean deliveries expressed as a percentage; Total: total number of deliveries with the characteristic under study.