Table 2. The presence and absence of oligohydramnios with respect to the presence of selected conditions of severe neonatal morbidity.

	With oligohydramnios	Without oligohydramnios	p-value
	(n = 40)	(n = 34)
Tracheal intubation	3 (8%)	2 (6%)	1.00
Respiratory distress syndrome	12 (30%)	14 (41%)	0.34
Intraventricular hemorrhage	4 (10%)	9 (26%)	0.08
Intraventricular hemorrhage grade III and IV	1 (3%)	0 (0%)	1.00
Necrotizing enterocolitis	1 (3%)	0 (0%)	1.00
Retinopathy of prematurity	1 (3%)	1 (3%)	1.00
Early-onset sepsis	2 (5%)	1 (3%)	1.00
Late-onset sepsis	1 (3%)	1 (3%)	1.00
Bronchopulmonary dysplasia	4 (10%)	2 (6%)	0.68
Pneumonia	1 (3%)	2 (6%)	0.59
Neonatal death before hospital discharge	3 (8%)	1 (3%)	0.62
Severe neonatal morbidity	18 (45%)	19 (56%)	0.48

The categorical variables were compared using Fisher's exact test [values presented as numbers (%)].

Severe neonatal morbidity was defined as a need for intubation, respiratory distress syndrome, pneumonia, bronchopulmonary dysplasia, retinopathy of prematurity, intraventricular hemorrhage, necrotizing enterocolitis, early-onset sepsis, late-onset sepsis and/or neonatal death before hospital discharge.