The relationship between the frequency of eating various snack foods, socioeconomic variables, and an increment in caries was studied in 143 adolescents. There were negative correlations between DMFT increments and the frequency of apples, fruit juice, and sugarless gum intake, and a positive association of DMFT increments with chocolate candy intake and spending money.
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Clancy et al. (1977) studied this question.
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