Factors related to tooth loss among community-dwelling middle-aged and elderly Japanese men.

J Epidemiol · 2013 · PMC3709550 · PMID 23812101

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a decreasing trendno p-value reported

9 In Japan, a study of 20 366 dentists showed a decreasing trend in intakes of carotene and vitamins A and C with increasing number of teeth lost.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.