Table 2.

Non-parametric data of patients with refractory or unexplained iron deficiency anemia.

Parameter		n	%
Sex	Male	44	42.3
	Female	66	63.5
Previous iron therapy	Yes	74	71.1
	No	30	28.8
Previous blood transfusion	Yes	38	36.5
	No	66	63.4
Upper endoscopy	No abnormalities	66	63.4
	Mild gastritis	30	28.8
	Antral erosions	8	7.69
Colonoscopy	Normal	60	57.6
	Nonspecific colitis	44	42.3
H. pylori Ag in stools	Positive	64	61.5
	Negative	40	38.4