Biomedical subjects

Malcolm J Bond

Publications and source records attributed to Malcolm J Bond.

8 recordsLinked to original sources

PubMed2007

Environmental stress, psychological stress and allostatic load.

The mechanism by which chronic caregiving stress results in poor health is not well understood. The objective was to determine whether such a mechanism may be allostatic load, a novel concept specifying physiological systems that may suffer cumulative wear and tear following chronic stress, leading collectively to poor health. The study examines the association of allostatic load with environmental and psychological stress in the contexts of dementia caregiving and relinquishment of care, and is a 2-year longitudinal comparison of three groups: 80 new dementia spouse caregivers, 120 veteran caregivers, and 60 non-caregivers. Data comprised allostatic load markers and environmental and psychological stress measures. Cross-lagged analyses produced a statistically significant association between psychological stress and one allostatic load component (primary mediators). Psychological stress was a better predictor of primary mediators than environmental stress. Primary mediators rose with time for caregivers, but not for non-caregivers. A greater rise was evident for caregivers who had relinquished their role by the second year, although the level of psychological stress actually declined. Primary mediators are a key component of the relationship between allostatic load and prior stress. When allostatic load is treated as an outcome of stress, it is important to distinguish environmental and psychological stress.

Adaptation, Psychological↗

PubMed2006

The contributions of psychological disposition and risk factor status to health following treatment for coronary artery disease.

BACKGROUND: Successful adjustment following treatment for coronary artery disease is related to both psychological disposition and risk factor status. Consideration of the interplay between these variables is required to better acknowledge their relationship with health outcome. AIMS: To determine the salience of self-efficacy and locus of control to both general self-rated health and current cardiac health, relative to risk factor status. To determine whether self-efficacy is a more salient predictor of health status than locus of control. METHODS: Men (n=248) treated in the previous 3 years for either coronary artery disease alone or a myocardial infarction completed a questionnaire in which clinical, risk factor (knowledge of risk factors, current risk factors, change in risk factors), psychological (self-efficacy, locus of control) and health information were sought. RESULTS: Self-efficacy and internal locus of control had both direct and indirect influences on health in the models in which knowledge of risk factors was treated as the potential mediator. This pattern of results was not evident when either current risk factors or change in risk factors were examined as potential mediators. In the models in which self-efficacy was considered as a potential mediator of locus of control in the prediction of health status, self-efficacy was determined to be the more relevant psychological construct. CONCLUSION: The consistent positive associations obtained among self-efficacy, cognitive risk factor status and health suggest that health professionals involved in cardiac rehabilitation should be encouraged to tailor interventions that allow patients to both improve their understanding of CAD and also to develop greater self-confidence in their ability to implement the acquired knowledge.

Adaptation, Psychological↗

PubMed2006

Implementation science: a role for parallel dual processing models of reasoning?

BACKGROUND: A better theoretical base for understanding professional behaviour change is needed to support evidence-based changes in medical practice. Traditionally strategies to encourage changes in clinical practices have been guided empirically, without explicit consideration of underlying theoretical rationales for such strategies. This paper considers a theoretical framework for reasoning from within psychology for identifying individual differences in cognitive processing between doctors that could moderate the decision to incorporate new evidence into their clinical decision-making. DISCUSSION: Parallel dual processing models of reasoning posit two cognitive modes of information processing that are in constant operation as humans reason. One mode has been described as experiential, fast and heuristic; the other as rational, conscious and rule based. Within such models, the uptake of new research evidence can be represented by the latter mode; it is reflective, explicit and intentional. On the other hand, well practiced clinical judgments can be positioned in the experiential mode, being automatic, reflexive and swift. Research suggests that individual differences between people in both cognitive capacity (e.g., intelligence) and cognitive processing (e.g., thinking styles) influence how both reasoning modes interact. This being so, it is proposed that these same differences between doctors may moderate the uptake of new research evidence. Such dispositional characteristics have largely been ignored in research investigating effective strategies in implementing research evidence. Whilst medical decision-making occurs in a complex social environment with multiple influences and decision makers, it remains true that an individual doctor's judgment still retains a key position in terms of diagnostic and treatment decisions for individual patients. This paper argues therefore, that individual differences between doctors in terms of reasoning are important considerations in any discussion relating to changing clinical practice. SUMMARY: It is imperative that change strategies in healthcare consider relevant theoretical frameworks from other disciplines such as psychology. Generic dual processing models of reasoning are proposed as potentially useful in identifying factors within doctors that may moderate their individual uptake of evidence into clinical decision-making. Such factors can then inform strategies to change practice.

Journal Article↗

PubMed2006

Relationships between family conflict, perceived maternal verbal messages, and daughters' disturbed eating symptomatology.

The objective was to investigate relationships between family conflict and the perceived communication of negative messages regarding weight and shape from mothers to daughters, and daughters' disordered eating symptomatology. A correlational study was conducted in which a questionnaire was completed by 315 women aged between 14 and 28 years. The sample comprised both secondary school students (n=196) and university students (n=119). Disordered eating symptomatology was operationalised as drive for thinness, body dissatisfaction, and bulimic symptoms. Family conflict and the perceived frequency of negative messages regarding weight and shape communicated from mothers were also reported by participants. With current BMI treated as a covariate, support was provided for the proposition that frequency of negative messages is a more important contributor to disordered eating symptomatology than family conflict for both secondary school students and university students. However, for secondary students there was no relationship between family conflict and drive for thinness. Recommendations for future research are provided, including the possibility of considering the perception of both positive and negative weight-related messages, and the relative importance of such messages when conveyed by people other than the maternal figure, such as fathers, siblings and peers.

Adolescent↗

PubMed2004

Dimensions of osteoarthritis self-management.

Our aims were to determine whether a taxonomy of self-management strategies for osteoarthritis could be identified, and whether the resultant dimensions of such a taxonomy demonstrate predictable relationships with health status indices. Participants (n = 117) from community-based self-help groups and a general rheumatology outpatient clinic completed a self-management inventory consisting of 11 items, answered for both the past 7 days and a day on which symptoms were worse than usual. Duration of symptoms, level of pain, perceived functional ability and self-rated health were recorded as indicators of health status. Three essentially identical factors were obtained for both past 7 days and worse day items. Resultant scales were labeled passive, complementary and active, respectively. Correlations with health status measures provided modest evidence for the construct validity of these self-management scales. Compared with a simple aggregate score based on the total number of strategies used, the scales provided a clearer understanding of the relationship between self-management and health. The study provided a useful extension to existing research, addressing a number of shortcomings identified by previous researchers. The identified self-management dimensions offered a greater insight into the self-management choices of patients. Suggestions for further improvements to the measurement of self-management are outlined.

Aged↗

PubMed2004

Measuring disability with parsimony: evidence for the utility of a single item.

PURPOSE: To provide evidence for the utility of a single item measure designed to quantify disability in the past 30 days. METHOD: Australian data from studies comprising a community-dwelling elderly sample (N = 328) and a sample of chronic osteoarthritis (OA) patients (N = 119) are reported. Degree of disability was classified as 0-30 days, 0 vs. 1 or more days, and 0-9 vs. 10 or more days. Associations between disability and a range of demographic, health-related, and psychological variables were assessed. RESULTS: Participants with OA reported a significantly higher level of disability than participants from the community sample regardless of how disability was classified. Modest levels of association were noted between the number of disability days (0-30) and both health and psychological indices in both samples. The three alternative classifications of disability made little difference to the significance of associations. On balance, the comparison of 0-9 vs. 10 or more days appeared the more predictive classification of disability. CONCLUSIONS: The performance of the single item measure of disability was generally very satisfactory. Future investigations into the clinical application of the item across a range of patient groups are encouraged.

Activities of Daily Living↗

PubMed2004

Piriformis syndrome: Correlation of muscle morphology with symptoms and signs.

OBJECTIVE: To determine the relation of symptoms and pain provocation tests to abnormal piriformis morphology among people with chronic buttock pain. DESIGN: Each of 2 clinical symptoms and 2 clinical signs were compared with the abnormal morphology found on ultrasound. The pain-free side was used as an internal control. SETTING: A tertiary referral center. PARTICIPANTS: A series of 27 consecutive patients (26 women, 1 man; average age, 48 y) with chronic low lumbosacral or buttock pain, who presented to a musculoskeletal clinic over a 12-month period, underwent ultrasound assessment of piriformis muscle morphology. Four patients were excluded because their body mass index was in excess of 30 kg/m 2 . INTERVENTION: The symptomatic piriformis muscle was injected with bupivacaine after pain was assessed on a visual analog scale (VAS), using the resisted abduction test. MAIN OUTCOME MEASURE: A 70% reduction of pain on the VAS was considered positive for pain in the piriformis muscle. RESULTS: Odds ratios (ORs) and 95% confidence intervals were calculated comparing each of the signs and symptoms with normal morphology. The highest ORs were found for pain on walking up inclines (10.8), referred pain (5.3), and pain on needling the piriformis muscle (6.0). CONCLUSIONS: This study did not provide a criterion standard for the diagnosis of piriformis syndrome, but it did support the syndrome as a contributing factor in chronic buttock pain and very low back pain.

Anesthetics, Local↗

PubMed2003

The quality of life of spouse dementia caregivers: changes associated with yielding to formal care and widowhood.

The focus of the study was the effect on spouse dementia caregivers of relinquishing care. The study used a longitudinal design, in which a group of 150 dementia caregivers were interviewed 2 years apart (designated Time 1 and Time 2), with data collected from both continuing caregivers and those who had relinquished care. The aims were to determine the extent to which changes over time in quality of life differed between continuing caregivers, those who had yielded to formal care, and those who had been widowed; and to examine whether change in quality of life variables was associated with time since yielding to formal care and time since death of the spouse. Quality of life was defined in terms of health status, psychological well-being, and activity participation. All participants were interviewed in their own homes. Three groups of participants were identified at Time 2: those who continued to provide care for their spouses (n=60); those who had yielded their caregiver role by admitting their spouses to permanent residential care (n=53); and those who had admitted their spouses to permanent institutional care, but whose spouse had then died (n=37). Different patterns of quality of life changes were observed between the three groups, with both positives and negatives associated with disengagement from the caregiving role. Positive changes were particularly evident in psychological well-being and activity participation. These findings were discussed in terms of their relevance for a life transitions approach to the relinquishment of caregiving.

Adaptation, Psychological↗