A Comparison of KL-6 and Clara Cell Protein as Markers for Predicting Bronchopulmonary Dysplasia in Preterm Infants

Table 1

Comparison of demographic and clinical characteristics between infants with and without BPD.

	BPD	Without BPD	P value
Number of patients	24	49
Birth weight, g	1124.6 ± 216.8	1311.8 ± 115.6	<0.0001
Gestational age, weeks	29.2 ± 1.7	31.2 ± 1.0	0.07
Male	15 (62.5%)	22 (44.9%)	0.16
Apgar score at 1 min	5.5 3.5–7	7 5–7	0.14
Apgar score at 5 min	6 5–8	7 7-8	0.10
Apgar score at 10 min	7 7-8	8 [8-8	0.07
Vaginal delivery	7 (29.2%)	9 (18.4%)	0.3
Prenatal steroids	23 (95.8%)	44 (89.8%)	0.39
Maternal pregnancy-induced hypertension	7 (29.2%)	18 (36.7%)	0.52
Maternal diabetes	2 (8.3%)	1 (2.0%)	0.24
Maternal infection	2 (8.3%)	4 (8.2%)	0.98
Premature rupture of membranes	11 (45.8%)	13 (26.5%)	0.1
Cord blood pH	7.30 ± 0.08	7.30 ± 0.08	1.0
Ureaplasma urealyticum positive in urine	3 (12.5%)	12 (13.3%)	0.56
Surfactant use	23 (95.8%)	31 (34.4%)	0.03
Mechanical ventilation ≥1 week	11 (45.8%)	4 (8.2%)	0.003
Pneumonia	4 (16.7%)	3 (6.1%)	0.17
Sepsis	18 (75.0%)	22 (44.9%)	0.02
Sepsis occurred within 15 days after birth	16 (66.7%)	14 (28.6%)	0.003
Sepsis occurred after 15 days after birth	2 (8.3%)	8 (16.3%)	0.36
Patent ductus arteriosus	6 (25.0%)	4 (8.2%)	0.06
Length of stay, d	49.9 ± 11.2	40.3 ± 6.6	0.0001
Patients discharged alive	20 (83.3%)	49 (100.0%)	0.04

Values are expressed as median [range] or number of individuals (percentage).