Is altruistic behavior associated with major depression onset?

PLoS One · 2009 · PMC2643004 · PMID 19234611

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marginal significanceno p-value reported

First, the sample size was relatively small which might explain the marginal significance level of the effect of unpaid assistance and emotional support on MD.

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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.