Correlation of ABO blood groups with treatment response and efficacy in infants with persistent pulmonary hypertension of the newborn treated with inhaled nitric oxide

Table 2 Analysis of the number of infants with responses in the three groups

Blood groups	Total number of infants	24–48 h of treatment Number of infants responding to iNO therapy (%)	72 h of treatment Number of infants responding to iNO therapy (%)	After the termination of treatment Number of infants responding to iNO therapy (%)
Blood type A	24	13 (54.2)	18_a (75.0)	19 _{a, b} (79.2)
Blood type B	20	5 (25.0)	7_b (35.0)	10 _b (50.0)
Blood type O	39	19(48.7)	29_a (74.4)	34_a (87.2)
χ²	-	4.267	10.477	10.188
P	-	0.118	0.005	0.006

The same subscript letter in the table indicates no difference between groups, while different subscript letters indicate significant differences between groups

ISSN: 1471-2393