Table 2.

Frequencies of ABO histo-blood group phenotypes of allergic rhinitis patients and controls by gender

	£ Patients (n = 168)					Controls (n = 168)
	Male*		Female*		p-value¥	Male*		Female*		p-value¥
ABO*	n	%	n	%		n	%	n	%
Total	54	100.0	114	100.0		54	32.1	114	67.9
A	11	20.4	42	36.8	0.034	22	40.7	46	40.3	1.000
B	3	5.6	15	13.2	1.184	7	12.9	14	12.3	1.000
AB	1	1.8	2	1.8	1.000	2	3.7	6	5.3	1.000
O	39	72.2	55	48.2	0.004	23	42.6	48	42.1	1.000

^¥ Calculated using Fisher's exact test

*For all ABO histo-blood group phenotypes from male and female patients (χ²: 8.895; DF: 3; p-value = 0.030) For all ABO histo-blood group phenotypes from male patients and male controls (χ :²9.729; DF: 3; p-value = 0.021)

^£Patients (Aversus non-A): adjusted OR: 0.438, IC 95%: 0.201 - 0.941; p-value = 0.034

^£Patients (O versus non-O): adjusted OR: 2.789, IC 95%: 1.385 - 5.616; p-value = 0.004