Blood group

Male (n = 24)

Female (n = 48)

P value

A—No. (%)

8 (33.3)

9 (18.8)

0.239

B—No. (%)

8 (33.3)

16 (33.3)

1.000

AB—No. (%)

1 (4.2)

6 (12.5)

0.412

O—No. (%)

7 (29.2)

17 (35.4)

0.791