Ruosha Li

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BACKGROUND Despite the proliferation of health information technology (IT) interventions, descriptions of the unique considerations for conducting randomized trials of health IT interventions intended for patient use are lacking. PURPOSE Our purpose is to describe the protocol to evaluate Pocket PATH (Personal Assistant for Tracking Health), a novel(More)
OBJECTIVES To investigate the association between emphysema heterogeneity in spatial distribution, pulmonary function and disease severity. METHODS AND MATERIALS We ascertained a dataset of anonymized Computed Tomography (CT) examinations acquired on 565 participants in a COPD study. Subjects with chronic bronchitis (CB) and/or bronchodilator response(More)
Techniques for conducting hypothesis testing on the median and other quantiles of two or more subgroups under complex survey design are limited. In this paper, we introduce programs in both SAS and R to perform such a test. A detailed illustration of the computations, macro variable definitions, input and output for the SAS and R programs are also included(More)
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