Study of risk factors for gastric cancer by populational databases analysis

Table 2 Association between the incidence of gastric cancer and risk/protection factors based on the Mann-Whitney test

Risk/protective factors	n	n (< P25)	Average	SD	n (> P75)	Average	SD	P value
HDI	171	46	0.52	0.14	43	0.76	0.09	0.000
Alcohol, liters of alcohol/inhabitant per year	172	45	3.74	3.42	43	10.59	5.17	0.000
Tobacco, % of smoking population	132	36	14.47	7.27	35	30.03	7.11	0.000
Fruits, g/person per day	165	42	145.84	109.74	40	222.9	89.92	0.001
Vegetables, g/person per day	165	42	154.35	151.55	40	318.66	167.25	0.000
Legumes, g/person per day	165	42	23.08	19.88	41	8.42	8.91	0.000
Meat, g/person per day	165	42	63.26	51.07	42	157.05	63.16	0.000
Fish, g/person per day	162	42	42.56	74.83	38	44.93	42.14	0.260
Obesity in males, % men > 20 yr and BMI > 30 kg/m2	172	46	9.56	102.11	42	17.03	67.73	0.000
Obesity in females, % women > 20 yr and BMI > 30 kg/m2	172	46	18.94	150.44	42	21.66	81.28	0.100

HDI: Human development index; BMI: Body mass index.