The role of serum procalcitonin in establishing the diagnosis and prognosis of pleural infection.

Respir Res · 2017 · PMC5291982 · PMID 28158976

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a strong trendno p-value reported

4 does show a strong trend between PCT and degree of intervention required and increased sample size may allow sufficient power to identify a statistically significant difference.

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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.