TY  - GEN
AU  - Lipsky,Ari M
AU  - Greenland,Sander
TI  - Confounding due to changing background risk in adaptively randomized trials
SN  - 1740-7753
PY  - 2012///0223
KW  - Bias
KW  - Confounding Factors, Epidemiologic
KW  - Models, Theoretical
KW  - Odds Ratio
KW  - Randomized Controlled Trials as Topic
KW  - methods
KW  - Risk
KW  - Time Factors
N1  - Publication Type: Journal Article; Research Support, N.I.H., Extramural
UR  - https://doi.org/10.1177/1740774511406950
ER  -