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Dietary factors in oral leukoplakia and submucous fibrosis in a population‐based case control study in Gujarat, India
Author(s) -
Gupta PC,
Hebert JR,
Bhonsle RB,
Sinor PN,
Mehta H,
Mehta FS
Publication year - 1998
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/j.1601-0825.1998.tb00279.x
Subject(s) - oral submucous fibrosis , medicine , quartile , leukoplakia , ascorbic acid , odds ratio , population , logistic regression , precancerous condition , environmental health , dentistry , case control study , food science , cancer , confidence interval , biology
OBJECTIVES: To investigate the relationship of specific nutrients and food items with oral precancerous lesions among tobacco users. DESIGN: A population‐based case‐control study. SETTING: Villages in Palitana taluk of Bhavnagar district, Gujarat, India. SUBJECTS AND METHODS: An interviewer‐administered food frequency questionnaire, developed and validated for this population, was used to estimate nutrient intake in blinded, house‐to‐house interviews. Among 5018 male tobacco users, 318 were diagnosed as cases. An equal number of controls matched on age (±5 years), sex, village, and use of tobacco were selected. MAIN OUTCOME MEASURES: Odds ratios (OR) from multiple logistic regression analysis controlling for relevant variables (type of tobacco use and economic status). RESULTS: A protective effect of fibre was observed for both oral submucous fibrosis (OSF) and leukoplakia, with 10% reduction in risk per g day ‐1 ( P < 0.05). Ascorbic acid appeared to be protective against leukoplakia with the halving of risk in the two highest quartiles of intake (versus the lowest quartile: OR = 0.46 and 0.44, respectively; P < 0.10). A protective effect of tomato consumption was observed in leukoplakia and a suggestion of a protective effect of wheat in OSF. CONCLUSION: In addition to tobacco use, intake of specific nutrients may have a role in the development of oral precancerous lesions.