The interpretation of evidence

doi:10.1136/bmj.39465.493090.3A

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Peter G Davies, GP principal

¹Keighley Road Surgery, Halifax HX2 9LL

Jenkinson and I have an article on a similar theme to Spence’s piece in this month’s Student BMJ.1 2 Any trial generates four summary numbers: relative risk reduction, absolute risk reduction, number needed to treat, and personal probability …