Prehospital identification of Covid-19: an observational study.

Scand J Trauma Resusc Emerg Med · 2021 · PMC7786859 · PMID 33407750

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an increasing trendno p-value reported

A priori, we suspected that we might find an increasing trend in predictive value over time due to improved guidelines and care providers learning more about the presentation of Covid-19 patients.

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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.