Increased Oxidative Stress in Gastric Cancer Patients and Their First-Degree Relatives: A Prospective Study from Northeastern Brazil

Table 1

Clinical characteristics of the sample population.

Characteristics	Gastric cancer ()	Dyspeptic controls ()	Relatives of gastric cancer ()	value
Age (yrs), mean	61	48	47.5	0.00^a; 0.863^b
Gender, (%)
Male	34 (68)	13 (23.2)	15 (30.6)	0.392^a
Female	16 (32)	43 (76.8)	34 (69.4)	0.00^b
Alcohol use, (%)	28 (56)	17 (30.3)	11 (22.4)	0.08^a; 0.361^b
Chronic smoking, (%)	29 (58)	8 (14.2)	0	0.00^a; 0.06^b
Education level
< 9 years	42 (84)	15 (26.8)	20 (40.8)	0.000^a
≥ 9 years	8 (16)	41 (73.2)	29 (59.2)	0.153^b
Income
< US$400	44 (88)	40 (71)	37 (75.5)	0.036^a
≥ US$ 400	6 (12)	16 (28.5)	12 (24.4)	0.597^b
Lauren type
Intestinal	38 (76)	—	—	—
Diffuse	12 (24)	—	—	—
TNM stage
I	12 (24)	—	—	—
II	8 (16)	—	—	—
III	6 (12)	—	—	—
IV	24 (48)	—	—	—

^aControls vs. gastric cancer. ^bControls vs. relatives of gastric cancer.