Need for oxygen therapy and ventilatory support in premature infants in a hospital in Southern Brazil

Table 3 Comparison of data according to the need for mechanical ventilation

	Ambient air-O2-CPAP	MV	OR (95%CI)	P value
	Median	Median
	(p25-p75)	(p25-p75)
	n (%) = 77 (85.6)	n (%) = 13 (14.4)
Maternal age	32.0 (28.5 - 36.0)	28.0 (25.0 - 31.5)	0.823 (0.710-0.954)	0.010a
GA in wk	34.1 (33.1-35.4)	29.4 (25.4-32.0)	0.632 (0.504-0.790)	< 0.001b
< 281	1 (14.3)	6 (85.7)	147.000 (11.527-1874.655)	< 0.001b
≥ 28 and < 301	4 (80.0)	1 (20.0)	6.125 (0.451-83.116)	0.173
≥ 30 and < 341	23 (85.2)	4 (14.8)	4.261 (0.727-24.970)	0.108
≥ 34 and < 371	49 (96.1)	2 (3.9)	1.000
Birth weight (g)	2260.0 (1707.5-2621.5)	1035.0 (605.0-1819.0)	0.997 (0.996-0.999)	< 0.001b
HR (bpm)	145.0 (135.0-153.5)	139.0 (129.5-155.0)	1.001 (0.970-1.032)	0.969
RR (com)	52.0 (41.0-64.0)	53.0 (46.5-64.5)	1.014 (0.971-1.059)	0.525
SpO2 (%)	93.0 (93.0-97.0)	96.0 (84.0-97.5)	0.975 (0.939-1.012)	0.178
Length of stay (d)	12.0 (5.0-21.0)	15.0 (1.5-39.0)	1.028 (0.990-1.067)	0.154
Apgar 1 min1
< 8	28 (71.81)	11 (28.2)	9.625 (1.989-46.569)	0.003a
≥ 8	49 (96.1)	2 (3.9)	1.000
Apgar 5 min1
< 8	2 (33.3)	4 (66.7)	16.667 (2.666-104.189)	0.003a
≥ 8	75 (89.3)	9 (10.7)	1.000
Outcome1
Discharge	76 (95.0)	4 (5.0)	1.000	< 0.001b
Death	1 (10.0)	9 (90.0)	171.000 (17.185-1701.583)

¹n (%).

^aP < 0.05.

^bP < 0.001. GA: Gestational age; HR: Heart rate; RR: Respiratory rate; SpO2: Peripheral oxygen saturation; O2: Oxygen therapy; CPAP: Constant positive airway pressure; MV: Mechanical ventilation; OR: Odds ratio; CI: Confidence interval.