The Adverse Effects and Nonmedical Use of Methylphenidate Before and After the Outbreak of COVID-19: Machine Learning Analysis.

J Med Internet Res · 2023 · PMC10468706 · PMID 37585250

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an increasing trendno p-value reported

It increased in May 2020 (80/2016, 4%) and showed an increasing trend until October 2020.

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