Intended for healthcare professionals

Rapid response to:

Education And Debate

Statistics Notes: Measurement error and correlation coefficients

BMJ 1996; 313 doi: https://doi.org/10.1136/bmj.313.7048.41 (Published 06 July 1996) Cite this as: BMJ 1996;313:41

Rapid Response:

Re: precedence rules in formula

Mea culpa! I am a rotten proof-reader. The original article as
submitted gave the formula in fraction form, with a numerator and
denominator. I did not notice when the article was type-set that a change
to the style of the formula had resulted in the mistake which Michael
McStephen has spotted. I thank him for putting me right.

My co-author was quite innocent, and would have noticed had he read
the proofs, being much more meticulous than myself!

Competing interests: No competing interests

03 May 2002
J Martin Bland
Prof. of Medical Statistics
St. George's Hospital Medical School, London SW17 0RE