Search PubMed⌕ Search

Biomedical subjects

Alan M Jette

Publications and source records attributed to Alan M Jette.

At least 37 records · Page 2Linked to original sources
PubMed2004

Short-form activity measure for post-acute care.

OBJECTIVE: To develop a comprehensive set of short forms using item response theory (IRT) and item pooling procedures for the purpose of monitoring postacute care functional recovery. DESIGN: Prospective study. SETTING: Six postacute health care networks in the greater Boston area, including inpatient acute rehabilitation, transitional care units, home care, and outpatient services. PARTICIPANTS: A convenience sample of 485 adult volunteers who were currently receiving skilled rehabilitation services. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: We developed a set of 6 short forms across 3 activity domains from new items and items from existing postacute care instruments. RESULTS: Inpatient- and community-based short forms were developed for each of 3 activity domains: physical & movement, applied cognition, and personal care & instrumental. Items were selected for inclusion on the short forms to maximize content coverage and information value of items across the range of content and to minimize ceiling and floor effects. We were able to match the distribution of sample scores with very good item precision for 1 of the constructs (physical & movement); the other 2 domains (personal care & instrumental, applied cognition) were more challenging because of the variability in patient recovery and ceiling effects. CONCLUSIONS: ITR methods and item pooling procedures were valuable in developing paired sets of short-form instruments for inpatient and community rehabilitation that provided estimates of functioning along a common metric for use across postacute care settings.

Activities of Daily Living↗
PubMed2004

Assessing disability in older adults: the effects of asking questions with and without health attribution.

OBJECTIVE: To determine the effects of using questions with and without health attribution on scores derived from a self-report disability instrument. METHODS: We administered the disability component of the Late Life Function and Disability Instrument to 75 community-dwelling older adults. Then, we administered the same 16 questions with attribution to specific health conditions. We used a series of analytic methods including weighted Kappa coefficient, Bowker's Test of Symmetry and Rasch analysis to assess the effects of attribution formats. RESULTS: A higher prevalence of disability was reported in the non-health attributed compared with the health attributed questions (t = 5.76; p < 0.001, 95% CI 3.8-7.8). Item analyses indicated that participants were significantly more likely to report disability on the non-health attributed version on 4 of the 16 questions. CONCLUSION: For community-dwelling older adults, the use of a non-health attribution format may be preferable in instruments designed to assess prevalence of disability from contributing factors other than just health.

Activities of Daily Living↗
PubMed2004

Activity outcome measurement for postacute care.

BACKGROUND: Efforts to evaluate the effectiveness of a broad range of postacute care services have been hindered by the lack of conceptually sound and comprehensive measures of outcomes. It is critical to determine a common underlying structure before employing current methods of item equating across outcome instruments for future item banking and computer-adaptive testing applications. OBJECTIVE: To investigate the factor structure, reliability, and scale properties of items underlying the Activity domains of the International Classification of Functioning, Disability and Health (ICF) for use in postacute care outcome measurement. METHODS: We developed a 41-item Activity Measure for Postacute Care (AM-PAC) that assessed an individual's execution of discrete daily tasks in his or her own environment across major content domains as defined by the ICF. We evaluated the reliability and discriminant validity of the prototype AM-PAC in 477 individuals in active rehabilitation programs across 4 rehabilitation settings using factor analyses, tests of item scaling, internal consistency reliability analyses, Rasch item response theory modeling, residual component analysis, and modified parallel analysis. RESULTS: Results from an initial exploratory factor analysis produced 3 distinct, interpretable factors that accounted for 72% of the variance: Applied Cognition (44%), Personal Care & Instrumental Activities (19%), and Physical & Movement Activities (9%); these 3 activity factors were verified by a confirmatory factor analysis. Scaling assumptions were met for each factor in the total sample and across diagnostic groups. Internal consistency reliability was high for the total sample (Cronbach alpha = 0.92 to 0.94), and for specific diagnostic groups (Cronbach alpha = 0.90 to 0.95). Rasch scaling, residual factor, differential item functioning, and modified parallel analyses supported the unidimensionality and goodness of fit of each unique activity domain. CONCLUSIONS: This 3-factor model of the AM-PAC can form the conceptual basis for common-item equating and computer-adaptive applications, leading to a comprehensive system of outcome instruments for postacute care settings.

Activities of Daily Living↗
PubMed2004

Validation of the Late-Life Function and Disability Instrument.

OBJECTIVES: To assess the concurrent and predictive validity of the Late-Life Function and Disability Instrument (LLFDI). DESIGN: Cross-sectional. SETTING: University-based human physiology laboratory. PARTICIPANTS: One hundred one men and women aged 80.8 +/- 0.4. MEASUREMENTS: A short physical performance battery (SPPB) and a self-paced 400-m walk (400-m W) were used as performance tests of lower extremity function. The LLFDI was used to assess self-reported function and physical disability. Partial correlations adjusted for age and body mass index were used to determine the concurrent and predictive validity of the LLFDI. Statistical significance was accepted at P<.004 using a testwise correction. RESULTS: LLFDI Overall Function scores were moderately associated with the SPPB (r=0.65, P<.001), 400-m W gait speed (r=0.69, P<.001), and measures of lower extremity function. Correlations of the two lower extremity subscores of the LLFDI (correlation coefficient (r)=0.63-0.73, P<.001) were greater than for the LLFDI upper extremity subscores (r=0.19-0.26, P>.004). Performance measures of function predicted disability limitations in the range of r=0.37-0.44 (P<.001) and disability frequency in the range of r=0.16-0.20 (P>.004). CONCLUSION: These findings support the concurrent and predictive validity of the LLFDI. Results support the use of the LLFDI scales as a substitute for physical performance tests when self-report is a preferred data-collection format.

Activities of Daily Living↗
PubMed2003

Assessing disability in studies on physical activity.

Despite the increased focus on disability as an important research outcome, there remains a need to improve disability instrumentation. This article discusses the need for improved operational differentiation in instruments used to assess disability outcomes. It details the challenge of clearly distinguishing between the concepts of function and disability in outcome instruments used in physical activity studies. The second issue in existing instruments is the limited precision to detect important changes in disability in response to physical activity interventions. Computer adaptive testing is discussed as a promising avenue for resolving the methodologic limitations inherent in existing outcome instruments. Priorities for future research that move the field forward in both of these areas are discussed.

Activities of Daily Living↗
PubMed2003

Are the ICF Activity and Participation dimensions distinct?

OBJECTIVE: To test the hypothesis that distinct Activity and Participation dimensions of the International Classification of Functioning, Disability, and Health could be identified using physical functioning items drawn from the Late Life Function and Disability Instrument. DESIGN: A cross-sectional, survey design was employed. SUBJECTS: The sample comprised 150 community-dwelling adults aged 60 years and older. METHODS: Exploratory factor analysis was used to identify interpretable dimensions underlying 48 physical functioning questionnaire items. RESULTS: Findings revealed that one conceptual dimension underlying these physical functioning items was not sufficient to adequately explain the data (X2 = 2383; p < 0.0001). A subsequent solution produced 3 distinct, interpretable factors that accounted for 61.1% of the variance; they were labeled: Mobility Activities (24.4%), Daily Activities (24.3%), and Social/Participation (12.4%). All 3 factors achieved high internal consistency with coefficient alphas of 0.90 or above. CONCLUSION: Within physical functioning, distinct concepts were identified that conformed to the dimensions of Activity and Participation as proposed in the ICF. We believe this is the first empirical evidence of separate Activity and Participation dimensions within the International Classification of Functioning, Disability, and Health classification.

Activities of Daily Living↗
PubMed2003

Knowledge dissemination and utilization in gerontology: an organizing framework.

PURPOSE: Enabling valuable research findings to be used by the field requires a strategic approach to dissemination and utilization rather than simply making constituencies aware of the information. This article describes a conceptual framework for the dissemination and utilization of information, along with examples of its use by the Boston University Roybal Center for Enhancement of Late Life Function. DESIGN AND METHODS: The framework identifies dissemination/utilization goals of exposure, experience, expertise, and embedding ("4 E") and relates each goal to strategies targeted for specific users. RESULTS AND IMPLICATIONS: The Boston University center exposed the field to information through presentations, print- and Web-based information, provided consumers and family members with new findings through motivational videotapes, developed expertise-level training programs, and embedded the new findings within organizations and systems. The 4 E framework can translate critical research outcomes into useful information to assist the field to better care and support available for individuals in late life.

Aged↗
PubMed2003

Comparison of functional status tools used in post-acute care.

There is a growing health policy mandate for comprehensive monitoring of functional outcomes across post-acute care (PAC) settings. This article presents an empirical comparison of four functional outcome instruments used in PAC with respect to their content, breadth of coverage, and measurement precision. Results illustrate limitations in the range of content, breadth of coverage, and measurement precision in each outcome instrument. None appears well-equipped to meet the challenge of monitoring quality and functional outcomes across settings where PAC is provided. Limitations in existing assessment methodology has stimulated the development of more comprehensive outcome assessment systems specifically for monitoring the quality of services provided to PAC patients.

Activities of Daily Living↗
PubMed2002

Late life function and disability instrument: I. Development and evaluation of the disability component.

BACKGROUND: Efforts to evaluate the effectiveness of clinical and community-based interventions designed to impact late-life disability have been hindered significantly by limitations in current instrumentation. More conceptually sound and responsive measures of disability are needed. METHODS: Applying Nagi's disablement model, we wrote questionnaire items that assessed disability in terms of frequency and limitation in performance of 25 life tasks. We evaluated their validity and test-retest reliability with 150 ethnically and racially diverse adults aged 60 and older who had a range of functional limitations, using factor analysis and Rasch analytic techniques to examine and refine the instrument. RESULTS: Our analyses resulted in a 16-item disability component with two dimensions, one focused on frequency of performance and the other addressing limitation in performance of life tasks, with two disability domains within each dimension. The frequency dimension consisted of a personal and a social role domain, and the limitation dimension consisted of an instrumental and a management role domain. Expected differences in summary scores of known-functional limitation groups support the validity of this instrument. Test-retest intraclass correlations of the reproducibility of each overall dimension summary score were moderate to high (intraclass correlation coefficients .68-.82). CONCLUSIONS: The Late-Life Function and Disability Instrument has potential to assess meaningful concepts of disability across a wide variety of life tasks with relatively few items.

Activities of Daily Living↗