Table 2.

Preceding clinical history before diagnosing a pneumoperitoneum

Variables	Group A, n = 13	Group B, n = 24	P value	Odds ratio, 95%CI
MV at birth (yes/no)	12/1	17/7	0.216	4.333
HFOV (yes/no)	5/13	3/24	0.100	4.375
PPHN (yes/no)	7/6	2/22	0.004	12.833
RDS (yes/no)	11/2	15/9	0.262	3.3
Pneumothorax (yes/no)	6/7	1/23	0.004	19.7
CPR (yes/no)	3/10	2/22	0.321	3.3
Vasopressor infusion (yes/no)	11/2	12/12	0.074	5.5
MV duration, d	17.1 ± 30.2 (1-111)	12.4 ± 21.7 (2-79)	0.067	-

Values are presented as patient number or mean ± standard deviation. CI: Confidence intervals; MV: Mechanical ventilation; HFOV: High-frequency oscillation ventilation; PPHN: Persistent pulmonary hypertension; RDS: Respiratory distress syndrome; CPR: Cardiopulmonary resuscitation.