Learn More
BACKGROUND The purpose of the study was to develop clinically important difference (CID) standards for patients with coronary artery disease and congestive heart failure that identify small, moderate, and large intraindividual changes with time in a modified version of the Chronic Heart Failure Questionnaire (CHQ) and the Medical Outcomes Study Short-Form(More)
OBJECTIVE Without clinical input on what constitutes a significant change, health-related quality of life (HRQoL) measures are less likely to be adopted by clinicians for use in daily practice. Although standards can be determined empirically by within-person change studies based on patient self-reports, these anchor-based methods incorporate only the(More)
OBJECTIVE On the eight scales of the Medical Outcomes Study Short-Form 36-Item Health Survey (SF-36), Version 2, we compared the clinically important difference (CID) thresholds for change over time developed by three separate expert panels of physicians with experience in quality of life assessment among patients with chronic obstructive pulmonary disease(More)
OBJECTIVES The purpose of this study was to first estimate the crude cross-sectional and longitudinal associations between age and the sense of control, and then to partition any joint variance attributable to a theoretically specified set of potential confounders. METHODS Sense of control was measured at baseline and at each of six bimonthly follow-up(More)
BACKGROUND We evaluated how well physicians' global estimates of disease severity correspond to more specific physician-rated disease variables as well as patients' self-rated health and other patient variables. METHODS We analyzed baseline data from 1662 primary care patients with chronic cardiac or pulmonary disease who were enrolled in a longitudinal(More)
OBJECTIVE To use triangulation methodology to better understand clinically important differences (CIDs) in the health-related quality of life (HRQoL) of patients with heart disease. DATA SOURCES/STUDY SETTING We used three information sources: a nine-member expert panel, 656 primary care outpatients with coronary artery disease (CAD) and/or congestive(More)
CONTEXT Many treatments aim to improve patients' health-related quality of life (HRQoL), and many care guidelines suggest assessing symptoms and their impact on HRQoL. However, there is a lack of consensus regarding which HRQoL outcome measures are appropriate to assess, and how much change on those measures depict significant HRQoL improvement. OBJECTIVE(More)
BACKGROUND Standards for change in health-related quality of life (HRQoL) measures used among asthmatic patients have been established by considering only patient preferences to determine important differences and may not reflect an informed clinical evaluation of change. OBJECTIVE To establish clinically important difference (CID) standards through the(More)
BACKGROUND Patient-perceived change in health-related quality of life (HRQoL) domains has often been classified using a 15-point patient transition rating scale. However, traditional change levels of trivial ( - 1, 0, or 1), minimal (2, 3 or - 2, - 3), moderate (4, 5 or - 4, - 5) and large (6, 7 or - 6, - 7) on this scale have been arbitrarily defined and(More)