Adverse events related to colonoscopy: Global trends and future challenges.

World J Gastroenterol · 2019 · PMC6337013 · PMID 30670909

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a decreasing trendno p-value reported

Teoh et al[ 31 ] showed that the overall perforation rate is 0.113%, and revealed a decreasing trend between 1998 and 2005 in China.

also in 47,180 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.