Dropouts and sub-groups--statistics can help but not cure.
Croft
P
P
Arthritis Research UK Primary Care Centre, Keele University, Keele, UK Centre for Health Sciences, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK Arthritis Research UK Primary Care Centre, Keele University, Keele, UK.
Froud
R
R
Lewis
A M
AM
D006801:Humans; D010352:Patient Dropouts / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*