Racial differences in osteoarthritis pain and function: potential explanatory factors.

OBJECTIVE: This study examined factors underlying racial differences in pain and function among patients with hip and/or knee osteoarthritis (OA). METHODS: Participants were n=491 African Americans and Caucasians enrolled in a clinical trial of telephone-based OA self-management. Arthritis Impact Measurement Scales-2 (AIMS2) pain and function subscales were obtained at baseline. Potential explanatory variables included arthritis self-efficacy, AIMS2 affect subscale, problem- and emotion-focused pain coping, demographic characteristics, body mass index, self-reported health, joint(s) with OA, symptom duration, pain medication use, current exercise, and AIMS2 pain subscale (in models of function). Variables associated with both race and pain or function, and which reduced the association of race with pain or function by >or=10%, were included in final multivariable models. RESULTS: In simple linear regression models, African Americans had worse scores than Caucasians on AIMS2 pain (B=0.65, P=0.001) and function (B=0.59, P<0.001) subscales. In multivariable models race was no longer associated with pain (B=0.03, P=0.874) or function (B=0.07, P=0.509), indicating these associations were accounted for by other covariates. Variables associated with worse AIMS2 pain and function were: worse AIMS2 affect scores, greater emotion-focused coping, lower arthritis self-efficacy, and fair or poor self-reported health. AIMS2 pain scores were also significantly associated with AIMS2 function. CONCLUSION: Factors explaining racial differences in pain and function were largely psychological, including arthritis self-efficacy, affect, and use of emotion-focused coping. Self-management and psychological interventions can influence these factors, and greater dissemination among African Americans may be a key step toward reducing racial disparities in pain and function.

The National Registry of Veterans with amyotrophic lateral sclerosis.

BACKGROUND: The Department of Veterans Affairs (VA) Cooperative Studies Program has established a National Registry of Veterans with Amyotrophic Lateral Sclerosis (ALS). This article describes the objectives, methods, and sample involved in the registry. METHODS: United States military veterans with ALS were identified through national VA electronic medical record databases and nationwide publicity efforts for an enrollment period of 4 1/2 years. Diagnoses were confirmed by medical record reviews. Registrants were asked to participate in a DNA bank. Follow-up telephone interviews are conducted every 6 months to track participants' health status. RESULTS: As of September 30, 2007, 2,400 veterans had consented to participate in the registry, 2,068 were included after medical record review, 995 were still living and actively participating, and 1,573 consented to participate in the DNA bank. 979 participants had been enrolled in the registry for at least 1 year, 497 for at least 2 years, and 205 for at least 3 years. Fourteen studies have been approved to use registry data for epidemiological, observational, and interventional protocols. CONCLUSION: This registry has proven to be a successful model for identifying large numbers of patients with a relatively rare disease and enrolling them into multiple studies, including genetic protocols.

Congestive heart failure patients' perceptions of quality of life: the integration of physical and psychosocial factors.

Congestive heart failure (CHF) lowers survival and worsens the quality of life (QOL) of over four million older Americans. Both clinicians and standardized instruments used to assess the QOL of patients with CHF focus primarily on physical symptoms rather than capturing the full range of psychosocial concerns. The purpose of this study was to gather descriptions of the components of QOL as understood by patients living with CHF. Focus groups were conducted with patients with known CHF, New York Heart Association (NYHA) class I-IV, and left ventricular fraction of <40%. Focus groups were audiotaped, transcribed, and reviewed for common and recurrent themes using the methods of constant comparisons. We conducted three focus groups (n = 15) stratified by NYHA stage with male patients ranging in age from 47-82 years of age. Five patients were classified with NYHA stage III/IV and ten with NYHA stage I/II. Thirty attributes of QOL were identified which fell into five broad domains: symptoms, role loss, affective response, coping, and social support. Expectedly, patients reported the importance of physical symptoms; however, participants also identified concern for family, the uncertainty of prognosis, and cognitive function as dimensions of QOL. Changes in patients' lives attributed to CHF were not always considered deficiencies; rather, methods of coping with CHF were identified as important attributes representing possible opportunities for personal growth. Clinicians must understand the full range of concerns affecting the QOL of their older patients with CHF. The findings suggest that psychosocial aspects and patient uncertainty about their prognosis are important components of QOL among CHF patients.