Jeffrey B Simmons

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Difference-in-difference (DD) methods are a common strategy for evaluating the effects of policies or programs that are instituted at a particular point in time, such as the implementation of a new law. The DD method compares changes over time in a group unaffected by the policy intervention to the changes over time in a group affected by the policy(More)
The objective of this study was to evaluate the outcomes of a diabetes disease management initiative among TennCare's Medicaid Population. A quasi-experimental group design was conducted using a control group and a diabetes disease management intervention group. Primary outcomes measures were rates for three key recommended tests (ie, microalbuminuria,(More)
Identi~cation of the therapeutic value of various antiarrhythmic strategies requires carefully designed and thoughtfully interpreted clinical trials. The turning point in approaches to the management of potentially life-threatening cardiac arrhythmias was the outcomes of the Cardiac Arrhythmia Suppression Trials (CAST and CAST-II) [1–4]. The adverse outcome(More)
STUDY DESIGN Psychometric studyObjectives:To develop and test a valid and reliable assessment of wheelchair skills for individuals with spinal cord injuries (SCI); the Queensland Evaluation of Wheelchair Skills (QEWS). SETTING Hospital, Australia. METHODS Phase 1: Four Delphi panel rounds with clinical experts were used to develop the QEWS. Phase 2:(More)
OBJECTIVE The aim of this article was to assess the predictive validity of the Adherence Estimator--a 3-item instrument designed to estimate a patient's propensity to adhere to medications prescribed for chronic disease. METHODS The Adherence Estimator was a 3-item part of a larger survey mailed to adults aged >or=40 years who had a qualifying index(More)
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