Richard J. Swartz

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Item selection is a core component in computerized adaptive testing (CAT). Several studies have evaluated new and classical selection methods; however, the few that have applied such methods to the use of polytomous items have reported conflicting results. To clarify these discrepancies and further investigate selection method properties, six different(More)
OBJECTIVES We sought to develop a mapping function from functional assessment of cancer therapy-melanoma (FACT-M) quality of life scores to the EuroQol-5D (EQ-5D) utility scores. METHODS FACT-M and EQ-5D scores were collected during a prospective study of melanoma-related quality of life at a tertiary cancer care center in the United States. The study(More)
As interest grows in creating computerized versions of established paper-and-pencil (P&P) questionnaires, it becomes increasingly important to explore whether changing the administration modes of questionnaires affects participants’ responses. This study investigated whether mode effects exist when administering the Center for Epidemiologic Studies(More)
OBJECTIVE Longitudinal neuropsychological assessments were performed to determine if adjuvant chemotherapy was associated with cognitive dysfunction in men with non-seminomatous germ cell tumors (NSGCT). METHODS Patients with NSGCT status post-orchiectomy that either received adjuvant chemotherapy (n = 55) or did not (n = 14) were recruited. Patients were(More)
Assessing change remains a challenge in patient-reported outcomes. In June 2009, a group of psychometricians, biostatisticians, and behavioral researchers from other disciplines convened as a Longitudinal Analysis of Patient-Reported Outcomes Working group as part of the Statistical and Applied Mathematical Sciences Institute Summer Psychometric program to(More)
In a series of 28 long-term dialysis patients with musculoskeletal complaints, the radiologic findings in six cases resembled those occurring in the arthropathy of idiopathic calcium pyrophosphate dihydrate deposition (CPPD) disease. These findings included osteophytes, subchondral cysts, and cartilage loss in the metacarpophalangeal joints, patellofemoral(More)
PURPOSE We prospectively evaluated the general and cancer specific quality of life, and psychosocial adjustment of patients with a renal mass treated with radical vs partial nephrectomy via a laparoscopic or an open approach. MATERIALS AND METHODS A total of 172 patients with renal tumors completed questionnaires before surgery, and 3 weeks, and 2, 3, 6(More)
The present study used a signaled appetitive nosepoke task as a measure of behavioral control or impulsivity related to reward system function in mice and determined how impulsivity correlated with voluntary ethanol consumption. Thirteen inbred strains were trained to nosepoke for food rewards and eventually trained to nosepoke for reward when an auditory(More)
PURPOSE To determine the prevalence rate of health behaviors in testis cancer survivors and to determine whether the rate of health behaviors in survivors was significantly different than those of their age-matched relative controls and a population-based control group matched for age, sex, education, and income. PATIENTS AND METHODS The health behaviors(More)