Biomedical subjects

Kathryn M McPherson

Publications and source records attributed to Kathryn M McPherson.

10 recordsLinked to original sources

PubMed2006

The effect of environment and task on gait parameters after stroke: A randomized comparison of measurement conditions.

OBJECTIVES: To assess the effect of environment and a secondary task on gait parameters in community ambulant stroke survivors and to assess the contribution of clinical symptoms to gait performance. DESIGN: A 2x3 randomized factorial design with 2 main factors: task (no task, motor task, cognitive task) and environment (clinic, suburban street, shopping mall). SETTING: Subjects were assessed in 1 of 3 settings: 2 in the community (a suburban street and shopping mall) and 1 clinical environment. PARTICIPANTS: Twenty-seven people with stroke (mean age, 61+/-11.6y; mean time since stroke onset, 45.8+/-34.2mo), living at home, were recruited from community stroke groups and from a local rehabilitation unit. Selection criteria included the following: ability to give informed consent, unilateral first ever or recurrent stroke at least 6 months previously, walking independently in the community, a gait speed between 24 and 50 m/min, Mini-Mental State Examination score of 24 or higher, and no severe comorbidity. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Gait speed (in m/min), cadence, and step length were assessed by using an accelerometer with adjustable thresholds. Clinical measures hypothesized to influence gait parameters in community environments were also assessed including fatigue, anxiety and depression, and attentional deficit. RESULTS: Twenty-seven people with a mean baseline gait speed of 42.2+/-5.9 m/min were randomly allocated to 1 of 9 conditions in which the setting and distraction were manipulated. Analysis of variance showed a significant main effect for environment (P = .046) but not for task (P = .37). The interaction between task and environment was not significant (P = .73). Adjusting for baseline gait speed, people walked on average 8.8m/min faster in the clinic (95% confidence interval, 0.3-17.3m/min) than in the mall. Scores for fatigue, anxiety and depression, and attentional deficit were higher than normative values but did not influence gait performance. CONCLUSIONS: This study suggests that people with chronic stroke cope well with the challenges of varied environments and can maintain their gait speed while performing a secondary task. Despite moderate levels of gait impairment, gait automaticity may be restored over time to a functional level.

Analysis of Variance↗

PubMed2005

Theory development and a science of rehabilitation.

PURPOSE: This article considers the role of theory and theory building in science and specifically in rehabilitation. It is argued that rehabilitation has tended to value theory testing over theory building and some evidence is presented for this. METHOD: Some general questions concerning the role of theory in scientific progress are discussed including: What is a theory? What is the role of theory in science? What makes a good scientific theory? How does theoretical change occur in science? Where relevant these questions are discussed in terms of examples from clinical rehabilitation research. RESULTS: Two important issues arising from the preceding discussion are then considered. First is the question of whether a general or unifying theory of rehabilitation is a desirable goal. The second concerns how we might begin to develop a coherent programme of theory building in rehabilitation. CONCLUSION: More time spent on rehabilitation theory building may enhance the fruits of empirical theory testing.

Humans↗

PubMed2005

Return-to-work outcomes following work disability: stakeholder motivations, interests and concerns.

INTRODUCTION: Satisfaction with return-to-work (RTW) outcomes is dependent on many factors, including a clear exposition of what people define as a "good outcome" and the information they use to determine if such an outcome has been achieved. This paper defines the key stakeholders involved in the RTW process and discusses the need to understand their motivations, interests, and concerns. METHODS: A review of the literature and discussions with RTW researchers conducted by a multidisciplinary group of academic researchers. RESULTS: Our analysis suggests that RTW stakeholders can share the goal of a successful RTW; however, this consensus has to be viewed in light of other, sometimes competing, goals and the environments in which stakeholders operate. CONCLUSIONS: It is suggested that more clearly articulating and operationalizing stakeholders' perspectives will allow researchers to advance the understanding of RTW interventions and outcomes.

Community Participation↗

PubMed2005

A developmental conceptualization of return to work.

INTRODUCTION: Although return to work (RTW) is a phenomenon that has been researched for many years, our ability to understand and improve outcomes is still limited. As an avenue for advancing the field, this paper presents an alternative way of thinking about RTW. METHOD: The conceptualization was constructed based on a review of the literature and the comments of RTW and workers' compensation researchers. RESULTS: RTW is presented as an evolving process, comprising four key phases: i.e., "off work," "work re-entry," "retention," and "advancement." In addition, multiple phase-specific outcomes that may be used to evaluate RTW success are advanced. CONCLUSION: Broadening thinking about RTW to take into consideration the complexities of its developmental nature holds promise for understanding and improving RTW, as it not only clarifies the importance of incremental milestones, but also facilitates intervention choice and evaluation.

Community Participation↗

PubMed2005

Functional measures across neurologic disease states: analysis of factors in common.

OBJECTIVE: To describe the underlying dimensions for a range of functional measures across 3 neurologic diseases at different time points. DESIGN: Multiple cohort study. SETTING: Combination of public hospital wards and community. PARTICIPANTS: Patients (N=308) from 3 cohorts: paralytic poliomyelitis (n=38), mean of 25 years previously, assessed once; acute stroke admitted to hospital and followed up for 12 months postdischarge (n=181); and traumatic brain injury (TBI), admitted to hospital and followed up for 12 months postdischarge (n=89). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The Barthel Index, FIM instrument, Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) physical component score (PCS) and mental component score (MCS), Community Integration Questionnaire (CIQ), and the London Handicap Score (LHS). Measures were compared at 2 time points: pre-event status for stroke, TBI and the polio cohort, and 12-month postdischarge status for stroke and TBI. RESULTS: The different measures generally correlated highly within disease states at each time point. Principal components analysis revealed 2 underlying dimensions, a physical dimension onto which loaded the Barthel Index, FIM, PCS, and LHS and a cognitive/emotional dimension onto which loaded the MCS and, for subjects with polio, the CIQ. These 2 dimensions accounted for 69% of the variance in measures at the pre-event time point and 85% of the variance at the 12-month time point. CONCLUSIONS: These data suggest 2 basic underlying dimensions across a wide range of measures in 3 different neurologic conditions even at different time points. Most of the variation in the measures can be captured using the 2 component summary scores (PCS, MCS) of the SF-36.

Adolescent↗

PubMed2005

A new classification for outcomes in illness and injury.

Illness and injury can lead to complex problems for patients and clinicians. A new approach from the World Health Organization (WHO), the International Classification of Functioning, Disability and Health (ICF), may help manage such patients, and evaluate the success of the interventions used. The authors discuss the application of the ICF model.

Activities of Daily Living↗

PubMed2004

Toward a cognitive-affective model of goal-setting in rehabilitation: is self-regulation theory a key step?

PURPOSE: The aim of this article is to argue that self-regulation theory might offer a useful model for clinical practice, theory-building and empirical research on goal-setting in rehabilitation. METHOD: Relevant literature on goal-setting and motivation in rehabilitation is considered and some problematic issues for current practice and future research are highlighted. Carver and Scheier's self-regulation theory and its application to rehabilitation research is examined. RESULTS: It is argued that self-regulation theory offers a robust theoretical framework for goal-setting and one in which the salient concepts of motivation and emotion are prominent. CONCLUSIONS: Self-regulation theory offers a potentially useful heuristic framework for rehabilitation research.

Attitude of Health Personnel↗

PubMed2004

Consequences of stroke, arthritis and chronic pain--are there important similarities?

PURPOSE: This study aimed to explore the applicability of a previously derived model of what mattered most to people with arthritis across a number of different disabling conditions. METHOD: A qualitative study using interviews with 30 participants from three out-patient groups (rheumatoid arthritis, stroke and chronic pain) was conducted. Participants were asked to identify and discuss the most important consequences of living with their condition. Narratives were explored for similarities and differences within and across conditions. RESULTS: While diagnostically related differences were clearly evident, particularly in categories within the Intrinsic, Extrinsic and Future Issues themes, a marked level of similarity in view was apparent in two themes, Taking Charge and Perceptions of Normality. CONCLUSIONS: The study identified a shared perspective about a number of issues, but also detailed where there were differences. We suggest explicit consideration of the themes highlighted in this research, and a deeper understanding of the inter-relatedness of seemingly separate issues will help health professionals and researchers re-think ways of working with people who have disabling conditions, and identify different factors to address in measuring the success of rehabilitation.

Adaptation, Psychological↗

PubMed2004

Quality of life of people with rheumatoid arthritis as measured by the World Health Organization Quality of Life Instrument, short form (WHOQOL-BREF): score distributions and psychometric properties.

OBJECTIVE: To assess the psychometric properties, including responsiveness, of the World Health Organization Quality of Life instrument, short form (WHOQOL-BREF) in people with rheumatoid arthritis. METHODS: A sample of 142 persons with rheumatoid arthritis were randomly selected from a regional disease register and completed questionnaires by postal survey. An additional sample of 72 consecutive inpatients completed questionnaires a few days prior to admission, the day of admission, the day of discharge, and 2 weeks following discharge. RESULTS: Test-retest reliability was adequate (intraclass correlation coefficient 0.71-0.91). Internal consistency was adequate except for the social relationships domain (Cronbach's alpha 0.64-0.87). Factor structure was fairly similar to that previously reported. Correlation with other measures of quality of life was supportive of concurrent validity. Indices of responsiveness were satisfactory except for the social relationships and environment domains, although there was actually no statistical difference in the area under a receiver operating characteristic plot between the WHOQOL-BREF domains and the Health Assessment Questionnaire. CONCLUSION: The WHOQOL-BREF has adequate psychometric properties in people with rheumatoid arthritis and should be considered a valid outcome measure for interventions that aim to improve quality of life for people with this disease.

Aged↗

PubMed2003

Duration of condition is unrelated to health-state valuation on the EuroQoL.

OBJECTIVE: To determine whether health valuations, such as those used in economic evaluation, are affected by duration of a health condition. People with disabling health conditions tend to value health more highly than members of the general population, and one explanation for this is that over time their experience of living with a disabling illness changes the way in which they value health. If this is so, a relationship between the duration of an individual's disabling health condition and the valuation they assign to their health-state might reasonably be expected. DESIGN: A postal survey using the EuroQoL (EQ-5D) instrument to collect descriptions and valuations for health from people who reported a diagnosis of either stroke or multiple sclerosis. Contact with participants was made through national support organizations and questionnaires were returned by mail. RESULTS: Eight hundred and ninety-four people completed the survey. One hundred (11 %) had one health-state indicating moderate problems in all five dimensions of the EQ-5D descriptive profile. For people with this health-state, analysis of covariance showed no relationship between valuation of health-state and time from onset of illness (F = 0.38, p = 0.54). This finding applied irrespective of the diagnosis, and for some other less frequently reported health-states. CONCLUSION: Clinical experience suggests that over time people adapt to long-term disability. However we found no evidence to support the proposition that higher health-state valuations by people with disabling conditions are explained by the actual duration of their condition.

Adaptation, Psychological↗