Risk and protective factors of drug abuse among adolescents: a systematic review.

BMC Public Health · 2021 · PMC8590764 · PMID 34774013

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a decreasing trendno p-value reported

Another study, on the other hand, reported that there was a decreasing trend of perceived drug risk in conjunction with the increasing usage of drugs [ 58 ].

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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.