Intended for healthcare professionals

Rapid response to:


Use of a dummy (pacifier) during sleep and risk of sudden infant death syndrome (SIDS): population based case-control study

BMJ 2006; 332 doi: (Published 05 January 2006) Cite this as: BMJ 2006;332:18

Rapid Response:

Under-powered and over-interpreted

I am absolutely staggered that your statistical reviewer allowed the
authors to get away with the comment that the use of a dummy "possibly
reduces the influence of known risk factors in the sleep environment". The
three confidence intervals on which this statement is made are: 0.12-3.59,
0.1-13.4 and 0.02-3.27. These are all huge confidence intervals ranging
from a 50 fold reduction to over a ten times increase. You cannot possibly
draw any conclusions from these results whatsover and to have done so
suggests a significant lapse in statistical reviewing standards.

Competing interests:
None declared

Competing interests: No competing interests

10 January 2006
Michael R Perkin
Clinical Lecturer Paediatrics
St George's, University of London