Robert O. Morgan

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BACKGROUND Patients with human immunodeficiency virus (HIV) infection need lifelong medical care, but many do not remain in care. The effect of poor retention in care on survival is not known, and we sought to quantify that relationship. METHODS We conducted a retrospective cohort study involving persons newly identified as having HIV infection during(More)
BACKGROUND AND AIMS A significant increase in the incidence of hepatocellular carcinoma (HCC) has been reported in the United States. The risk factors underlying this increase remain unclear. METHODS By using Surveillance, Epidemiology, and End-Results program (SEER)-Medicare-linked data, we conducted a population-based study to examine temporal changes(More)
The chronic fatigue syndrome (CFS), formerly known as chronic Epstein-Barr virus syndrome, is a clinical state of some complexity and uncertain etiology. In order to characterize in a comprehensive manner the status of laboratory markers associated with cellular immune function in patients with this syndrome, 30 patients with clinically defined CFS were(More)
BACKGROUND & AIMS The incidence of intrahepatic cholangiocarcinoma has been recently increasing in the United States. In this case-control study, we used the Surveillance, Epidemiology, and End Results-Medicare database to evaluate the prevalence of known risk factors for intrahepatic cholangiocarcinoma and explore other potential risk factors. METHODS We(More)
BACKGROUND Diabetes has been associated with an increased risk of hepatocellular carcinoma (HCC) in studies of referred patients. This is the first population based case control study in the USA to examine this association while adjusting for other major risk factors related to HCC. METHODS We used the Surveillance Epidemiology and End-Results Program(More)
A dozen studies have been published showing that opiate antagonists suppress alcohol drinking in animals, and two independent placebo-controlled, double-blind clinical trials of naltrexone found this agent was associated with decreased alcohol craving and consumption in alcohol-dependent patients. Nalmefene is a newer opiate antagonist that has a number of(More)
BACKGROUND Poor retention in HIV care leads to poor survival. The predictors of poor retention in HIV care are not well understood, especially from US nationwide datasets. We determined the predictors of poor retention in HIV care among a group of US veterans and examined whether poor retention was confounded by other predictors of survival. METHODS We(More)
OBJECTIVES To examine the relationship between a global measure of Medicare program familiarity and a broad set of measures of actual and perceived healthcare access. DESIGN Mailed survey in fall of 2004 (2,997 completed surveys; 53% response rate). SETTING Metropolitan and nonmetropolitan areas across the United States. PARTICIPANTS White, black, and(More)
UNLABELLED Surveillance for hepatocellular carcinoma (HCC) in patients with cirrhosis is recommended but may not be performed. The extent and determinants of HCC surveillance are unknown. We conducted a population-based United States cohort study of patients over 65 years of age to examine use and determinants of prediagnosis surveillance in patients with(More)
OBJECTIVE To determine whether specific nutrient abnormalities occur in earlier stages of HIV-1 infection, thereby preceding the marked wasting and malnutrition that accompany later stages of the infection. DESIGN A longitudinal investigation to determine biological, psychological and social factors thought to influence the progression and outcome of(More)