Further reading

Altman, D.G. (1991) Practical Statistics for Medical Research, Chapman and Hall, London.

Brown, R.A. and Swanson Beck, J. (1994) Medical Statistics on Personal Computers, BMJ Publishing Group, Plymouth.

Gardner, M.J. and Altman, D.G. (1989) Statistics with Confidence, BMJ Publishing Group, London.

Polgar, S. and Thomas, S.A. (1995) Introduction to Research in the Health Sciences, Churchill Livingstone, Edinburgh.

Swinscow, T.D.V (1996) Statistics at Square One, 9th edn, BMJ Publishing Group, London.