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Table 1 Baseline maternal and neonatal characteristics

From: Impact of oxygen concentration on time to resolution of spontaneous pneumothorax in term infants: a population based cohort study

Characteristics RA (n = 30) MO (n = 35) HO (n = 27) P
Maternal
Maternal age (yrs), mean (SD) 29.4 (5.4) 28.6 (5.9) 30.0 (6.2) 0.64
Antenatal corticosteroids, n (%) 0 (0.0) 2 (5.7) 0 (0.0) 0.19
Chorioamnionitis, n (%) 3 (10.0) 2 (5.7) 2 (7.4) 0.81
Cesarean section, n (%) 8 (26.7) 16 (45.7) 13 (48.1) 0.18
Neonatal
Male, n (%) 28 (93.3) 24 (68.6) 16 (59.3) 0.01
GA, wks, mean (SD) 39 (1.2) 39 (1.2) 39 (1.2) 0.90
BW, g, mean (SD) 3328.5 (471.3) 3480.9 (487.8) 3405.0 (435.7) 0.43
Resuscitation at birth, n (%) (free flow oxygen only) 4 (13.3) 8 (22.9) 5 (18.5) 0.62
Apgar score at 5 min, median (range 25th -75th percentile) 9 (8–9) 9 (9–9) 9 (8–9) 0.41
Age of admission, hours, median (range 25th -75th percentile) 0.3 (0.2-1.0) 1 (0.1-20.0) 0.5 (0.2-3.0) 0.19
  1. RA = room air, MO = moderate oxygen concentration, HO = high oxygen concentration, SD= standard deviation, GA = gestational age, BW = birth weight.