An update on the "empirical turn" in bioethics: analysis of empirical research in nine bioethics journals.

BMC Med Ethics · 2018 · PMC5803920 · PMID 29415709

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an increasing trendno p-value reported

Results Empirical research in the nine bioethics journals: an increasing trend?

also in 63,971 other papers

highly significantno p-value reported

The authors also noted an increase in the percentage of empirical papers published from 5.4% in 1990 to 15.4% in 2003; and a highly significant increase in empirical publications in the period 1997–2003 compared with 1990–1996.

also in 132,142 other papers

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.