Year: 1996 Source: BMJ, v.313, no.7061, (October 5, 1996), p.884 SIEC No: 19970098

Simon Hatcher, states more information than John A. Dennely provided is required. S. Hatcher says “unfortunately, the chance of detecting a difference in length of illness, in this study, is less than 50%”. “Having more than one control per case would increase the chance of detecting a significant difference, and perhaps a more useful approach would be to combine this with information about the nature of the difficulties faced by the patient”.