Selecting screening criteria for clinical trials: an example from the Systolic Hypertension in the Elderly Program.


In clinical trials that study people with a continuous measure defined categorically, even repeated measurements within a visit and over successive visits do not prevent error-free classification. We describe the design of a screening procedure for the Systolic Hypertension in the Elderly Program (SHEP), a randomized clinical trial designed to test whether… (More)


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