Statistics and pitfalls of trend analysis in cancer research: a review focused on statistical packages.

J Cancer · 2020 · PMC7086268 · PMID 32226510

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an overall trendno p-value reported

A simple linear regression model and a piecewise-linear model may be both valid statistically, but the former is preferred for an overall trend and the latter is for the data of long study-period or those beyond a simple linear-trend. 5 .

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