An introduction to power and sample size estimation

Jones, S R
Carley, S
Harrison, M

¹North Manchester Hospital, Manchester, UK
²Royal Bolton Hospital, Bolton, UK
³North Staffordshire Hospital, UK

Correspondence to: Dr S R Jones, Emergency Department, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK; [email protected]

We would like to thank Fiona Lecky, honorary senior lecturer in emergency medicine, Hope Hospital, Salford for her help in the preparation of this paper.

Emergency Medicine Journal 20(5):p 453-458, September 2003.

The importance of power and sample size estimation for study design and analysis.