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J Vasc Surg. 2002 Jul;36(1):194-5.

A brief note on overlapping confidence intervals.

Author information

1
Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada. peter.austin@ices.on.ca

Abstract

Clinical researchers frequently assess the statistical significance of the difference between two means by examining whether the two 95% confidence intervals overlap. The purpose of this brief communication is to illustrate that the 95% confidence intervals for two means can overlap and yet the two means can be statistically significantly different from one another at the alpha = 0.05 level.

PMID:
12096281
[Indexed for MEDLINE]
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