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Table 2 Neonatal outcomes

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
Median (range 25th-75th percentile)
SpO2 (%) at admission 96.5 (94–99) 89 (81–94) 88 (83–92) < 0.001
Concentration of oxygen (%) inspired at initiation of treatment 21 (21–21) 35 (29–40) 85 (65–100) < 0.001a
Maximum oxygen concentration (%) inspired during the treatment period 21 (21–21) 40 (30–50) 85 (65–100) < 0.001a
Total duration of supplemental oxygen therapy, hours 0 (0–0) 10 (3–23) 12 (8–27) 0.19a
Respiratory rate at admission 63 (52–75) 65 (54–74) 72 (64–80) 0.13
ACoRN score at admission 3 (2–4) 4 (3–6) 6 (5–7) < 0.001
ACoRN score according to severity     < 0.001
<5 26 (86.7) 23 (65.7) 2 (7.4)
≥5 4 (13.3) 12 (34.3) 25 (92.6)
Length of hospital stay, hours 47.3 (23.5-64.0) 47.3 (24.0-95.3) 47.5 (27.3-71.9) 0.54
Number (%)
Site of pneumothorax on chest x-ray     0.88
Right 11 (36.7) 17 (48.6) 13 (48.1)
Left 10 (33.3) 10 (28.6) 7 (25.9)
Bilateral 9 (30.0) 8 (22.9) 7 (25.9)
Size of pneumothorax based on CXR     0.18
Small 21 (70.0) 25 (71.4) 15 (55.6)
Moderate 9 (30.0) 6 (17.1) 10 (37.0)
Large 0 (0.0) 4 (11.4) 2 (7.4)
Failure of treatment 0 (0.0) 4 (11.4) 2 (7.4) 0.17a
  1. SpO2 = saturation of peripheral oxygen. aWilcoxon Rank Sum Test was used to assess statistical differences. P-values only represent a comparison between the HO and MO groups.