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Table 2 Sociodemographic characteristics associated with PPV and supplemental O2 in the delivery room in newborns with ≥ 34 weeks/gestation

From: Factors associated with the use of supplemental oxygen or positive pressure ventilation in the delivery room, in infants born with a gestational age ≥ 34 weeks

  PPV P-value Supplemental O2 P-value*
  n % n %
Source of payment of birth
 Public (18,021) 755 4.2 0.029 2,272 12.6 <0.001
 Private (4,700) 164 3.5 701 14.9
Age in years
 12–19 (4,269) 210 4.9 <0.001 519 12.2 0.013
 20–34 (16,061) 591 3.7 2,104 13.1
 ≥ 35 (2,384) 116 4.9 350 14.7
Years of schooling
 ≤ 7 (5,979) 225 3.8 0.494 686 11.5 <0.001
 8 to 10 (5,778) 236 4.1 727 12.6
 11 to 14 (8,800) 370 4.2 1,243 14.1
 ≥ 15 (2,050) 76 3.7 303 14.8
Previous births
 0 (10,539) 480 4.6 0.001 1,488 14.1 <0.001
 1–2 (9,826) 356 3.6 1,230 12.5
 ≥ 3 (2,355) 83 3.5 255 10.8
Fetal presentation
 Cefalic (21,798) 877 4.0 0.407 2,815 12.9 <0.001
 Non-cefalic (n = 922) 42 4.6 159 17.3
Type of pregnancy
 Single (22,257) 883 4.0 <0.001 2,857 12.8 <0.001
 Multiple (463) 36 7.8 117 25.3
Obstetric risk
 Any (5,072) 303 6.0 <0.001 883 17.4 <0.001
 Hypertensive disorders (2,417) 151 6.3 <0.001 443 18.4 <0.001
 Diabetes (pre-gestational or gestational) (1,951) 105 5.4 0.002 318 16.3 <0.001
 Abruptio placentae (219) 26 12.0 <0.001 50 23.0 <0.001
 Placental praevia (100) 6 6.0 0.322 24 23.8 0.001
 Intra uterine growth restriction (1,118) 83 7.5 <0.001 211 18.9 <0.001
Gestational age in weeks
 34–36 (2,002) 180 9.0 <0.001 469 23.5 <0.001
 37–38 (8,276) 274 3.3 990 12.0
 39–41 (11,865) 430 3.6 1,441 12.2
 42 or more (577) 36 6.3 74 12.8
Type of delivery
 Vaginal (11,074) 419 3.8 0.002 1,137 10.3 <0.001
 Prelabor C-section (10,331) 424 4.1   1,610 15.6  
 Intrapartum C-section (1,315) 76 5.8   227 17.3  
Total: 22,720 919 4.0   2,974 13.1  
  1. * χ2 tests