Social determinants of health and periodontal disease in Brazilian adults: a cross-sectional study.

BMC Oral Health · 2013 · PMC3663668 · PMID 23688161

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a decreasing trendno p-value reported

The results of the 2010 Demographic Census show that income inequality continues to be very high in Brazil, although there has been a decreasing trend in recent years.

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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.