Relationship between neonatal respiratory distress syndrome pulmonary ultrasonography and respiratory distress score, oxygenation index, and chest radiography grading

Table 5 Correlation between the respiratory distress syndrome neonatal ultrasonography score and respiratory distress score, oxygenation index, and chest X-ray grade before and after treatment (n = 73)

Comparator	Ultrasonography score
	Before treatment		After treatment
	ρ	P value	ρ	P value
Respiratory distress score	0.446	< 0.001	0.429	< 0.001
Oxygenation index	0.703	< 0.001	0.748	< 0.001
Chest X-ray grade	0.859	< 0.001	0.764	< 0.001