title: Tobacco chewing and risk of gastric cancer: a case-control study in Yemen.
abstract: This study aimed to assess the risk factors for gastric cancer in Yemen. A hospital-based case-control study of 70 cases and 140 controls was carried out in Sana'a city between May and October 2014. A structured questionnaire was used to collect information through direct interview. Living in rural areas, tobacco chewing and drinking untreated water were significant risk factors for gastric cancer. Frequent consumption of chicken, cheese, milk, starchy vegetables, cucumber, carrots, leeks, sweet pepper, fruit drinks, legumes and olive oil were associated significantly with decreased risk of gastric cancer. Multiple logistic regression analysis showed that chewing tobacco and frequent consumption of white bread were associated with increased risk of gastric cancer, whereas frequent consumption of chicken, cooked potatoes and fruit drinks had an inverse association. Risk of gastric cancer can be prevented by health education and increasing community awareness.
authors.affiliation: Department of Community Health, Faculty of Medicine, University of Science and Technology, Sana'a, Yemen.
authors.forename: F A
authors.initials: FA
authors.lastname: Al-Qadasi
authors.affiliation: Department of Community Health, Faculty of Medicine, University of Science and Technology, Sana'a, Yemen; Medical Molecular Biological Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
authors.forename: S A
authors.initials: SA
authors.lastname: Shah
authors.affiliation: Community Medicine Unit, International Medical School, Management and Science University, Shah Alam, Selangor, Malaysia.
authors.forename: H F
authors.initials: HF
authors.lastname: Ghazi
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018570:Risk Assessment; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000209:etiology* / Q000517:prevention & control; D011795:Surveys and Questionnaires; D064424:Tobacco Use / Q000009:adverse effects*