Table 3. Comparison of ABO subgroup distributions of the patients with and without lung involvement.

p=0.097.

	ABO blood subgroup				Total
	A	B	O	AB
Patients without lung involvement	21 (36.8%)	12 (21%)	23 (40.4%)	1 (1.8%)	57 (100%)
Patients with lung involvement	80 (51.9%)	20 (13%)	46 (29.9%)	8 (5.2%)	154 (100%)
Total	101 (47.9%)	32 (15.2%)	69 (32.7%)	9 (4.2%)	211 (100%)