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Table 1 Sociodemographic characteristics and type of delivery 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

  Vaginal (n = 11,074) Prelabor C-section (n = 10,331) Intrapartum C-section (n = 1,315) P-value*
  n (%) n (%) n (%)
Source of payment of birth
 Public 10,512 (94.9) 6,368 (61.6) 1,140 (86.7) <0,001
 Private 562 (5.1) 3,963 (38.4) 175 (13.3)  
Age in years (11,071; 10,328; 1,315)
 12–19 2,739 (24.7) 1,218 (11.8) 312 (23.7) <0,001
 20–34 7,505 (67.8) 7,664 (74.2) 892 (67.8)  
 ≥ 35 827 (7.5) 1,446 (14.0) 111 (8.4)  
Years of schooling (11,030; 10,267; 1,310)
 ≤ 7 3,815 (34.6) 1,791 (17.4) 373 (28.5) <0,001
 8–10 3,303 (29.9) 2,155 (21) 320 (24.4)  
 11–14 3,617 (32.8) 4,650 (45.3) 533 (40.7)  
 ≥ 15 295 (2.7) 1,671 (16.3) 84 (6.4)  
Previous births
 0 4,696 (42.6) 5,126 (46.5) 717 (6.5) <0,001
 1–2 4,844 (43.9) 4,501 (40.8) 481 (4.4)  
 ≥ 3 1,534 (13.9) 704 (6.4) 117 (1.1)  
Fetal presentation
 Cefalic 11,022 (99.5) 9,599 (92.9) 1,177 (89.5) <0,001
 Non-cefalic 52 (0.5) 732 (7.1) 138 (10.5)  
Type of pregnancy
 Single 11,007 (99.4) 9,994 (96.7) 1,256 (95.5) <0,001
 Multiple 67 (0.6) 337 (3.3) 59 (4.5)  
Obstetric risk
 Any 1,410 (12.7) 3,283 (31.8) 377 (28.7) <0,001
 Hypertensive disorders 601 (5.4) 1,680 (16.3) 136 (10.3) <0,001
 Diabetes (pre-gestational or gestational) 799 (7.2) 1,047 (10.1) 105 (8.0) <0,001
 Abruptio placentae 33 (0.3) 154 (1.5) 31 (2.4) <0,001
 Placental praevia 17 (0.2) 76 (0.7) 7 (0.5) <0,001
 Intra uterine growth restriction 55 (0.5) 902 (8.7) 160 (12.2) <0,001
Gestational age in weeks
 34–36 860 (7.8) 991 (9.6) 151 (11.5) <0,001
 37–38 3,671 (33.1) 4,189 (40.5) 416 (31.6)  
 39–41 6,237 (56.3) 4,915 (47.6) 713 (54.2)  
 42 or more 306 (2.8) 236 (2.3) 35 (2.7)  
  1. * χ2 tests