Problems in the use of aggregate measures.
McGee
D L
DL
Cooper
R S
RS
Liao
Y
Y
D015982:Bias; D006801:Humans; D007182:Income; D015233:Models, Statistical; D009369:Neoplasms / Q000401:mortality*; D012044:Regression Analysis; D018401:Sample Size; D012959:Socioeconomic Factors; D016019:Survival Analysis