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This is a foundational study that applies Receiver Operating Characteristic (ROC) analysis to the evaluation of a chronic disease model that utilizes Remote Monitoring (RM) devices to identify clinical deterioration in a Chronic Obstructive Pulmonary Disease (COPD) population. Background: RM programmes in Disease Management (DM) are proliferating as one strategy to address management of chronic disease. The need to validate and quantify evidence-based value is acute. There is a need to apply new methods to better evaluate automated RM systems. ROC analysis is an engineering approach that has been widely applied to medical programmes but has not been applied to RM systems. Evaluation of classifiers, determination of thresholds and predictive accuracy for RM systems have not been evaluated using ROC analysis. Objectives: (1) apply ROC analysis to evaluation of a RM system; (2) analyse the performance of the model when applied to patient outcomes for a COPD population; (3) identify predictive classifier(s); (4) identify optimal threshold(s) and the predictive capacity of the classifiers. Methods: Parametric and non-parametric methods are utilized to determine accuracy, sensitivity, specificity and predictive capacity of classifiers Saturated Peripheral Oxygen (SpO2), Blood Pressure (BP), Pulse Rate (PR) based on event-based patient outcomes that include hospitalisation (IP), accident & emergency (A&E) and home visits (HH). Population: Patients identified with a primary diagnosis of COPD, monitored for a minimum of 183 days with at least one episode of in-patient (IP) hospitalisation for COPD in the 12 months preceding the monitoring period. Data Source: A subset of retrospective de-identified patient data from an NHS Direct evaluation of a COPD RM programme. Subsets utilized include classifiers, biometric readings, alerts generated by the system and resource utilisation. Contribution: Validates ROC methodology, identifies classifier performance and optimal threshold settings for the classifier, while making design recommendations and putting forth the next steps for research. The question answered by this research is that ROC analysis can provide additional information on the predictive capacity of RM systems. Justification of benefit: The results can be applied when evaluating health services and planning decisions on the costs and benefits. Methods can be applied to system design, protocol development, work flows and commissioning decisions based on value and benefit. Conclusion: Results validate the use of ROC analysis as a robust methodology for DM programmes that use RM devices to evaluate classifiers, thresholds and identification of the predictive capacity as well as identify areas where additional design may improve the predictive capacity of the model.

Objective: Chronic pain is a common condition worldwide that poses significant impact to society in terms of its health and economic costs. It has been found to be related to a number of emotional and cognitive factors that are amenable to psychological treatments. Traditional cognitive-behavioral therapy (CBT) for chronic pain has become the gold standard of psychological treatment with reported efficacy. However, recent meta-analyses have found its effect size to be only modest at most. Moreover, its specific mechanisms of action are not well elucidated. With recent advances in neuroscience on possible neurocognitive processes underlying chronic pain, alternative treatment models targeting these specific neurocognitive processes are worth exploring. The present study tested the effectiveness of the Four-step Mindfulness-based Therapy (FSMT) for chronic pain in a randomized-controlled trial. The FSMT was chosen because of its explicit emphasis on altering neurocognitive processes that appear to be highly relevant in treating chronic pain. Method: Ninety-nine chronic pain patients in a hospital cluster-based outpatient pain clinic were randomly allocated to either the FSMT treatment or wait-list control group. The FSMT was modified for use with chronic pain and incorporated mindfulness exercises, such as mindful breathing and mindful meditation. Treatment consisted of eight weekly two-hour group sessions conducted by a clinical psychologist experienced in the implementation of the FSMT protocol. Assessment took place at baseline and post-treatment for both the FSMT and wait-list control. For the FSMT, assessment also took place at mid-group and 3-month follow-up. Results: Findings showed that the FSMT produced superior outcomes in terms of activity interference (primary endpoint), pain unpleasantness, and depression when compared to the wait-list control group or over time. Improvements were also found in the process measures of pain catastrophizing and pain acceptance. All treatment effects were maintained at follow-up. Further, the effects have been shown to be clinically significant and reliable above and beyond measurement errors. Mediational analyses revealed that pain catastrophizing and pain acceptance mediated the effects of FSMT on the outcomes of activity interference and depression; pain catastrophizing also mediated the effect of FSMT on the outcome of pain unpleasantness. Conclusions: The present study was the first to establish statistical and clinical evidence of the FSMT for chronic pain. It also revealed possible processes and mechanisms that might have brought about the changes in outcome, namely reduction in pain catastrophizing and improvement in pain acceptance. How the FSMT led to the outcome changes via these two processes was discussed and enriched by neurocognitive perspectives. Future studies should seek to further compare the FSMT with other active psychological treatments for chronic pain and collect neuroimaging data to further illustrate the neurocognitive processes involved. / Wong, Chi Ming. / "October 2009." / Adviser: Freedom Leung. / Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 139-175). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.

This study surveys the resources, facilities for care and medical treatment provided for the chronically ill of Vancouver. The historical development of the problem has been briefly covered, also, the probable future situations which will arise. As the care of the chronically ill has become one of the major public welfare problems in the post-war period, the economic circumstances and implications of chronic illness have been emphasized. Each of the institutions described was visited and over two hundred chronically ill patients personally interviewed. More than four hundred files and records were read in various social agencies; information was also secured from interviews with administrators, directors and owners of the various services described. The survey reveals many problems and inadequacies. Hospital, clinical and custodial facilities for the most part are seriously inadequate and not always properly utilized. A confused administrative structure and an unsatisfactory division of responsibility are further obstacles to more effective co-ordination. Recommendations for the improvement of existing situations and the creation of new services are made. The importance of the social caseworker in the establishment of an effective treatment program for the chronically ill is stressed. / Arts, Faculty of / Social Work, School of / Graduate

Background and aims: Despite living with a gluten-free diet (GFD) Swedish women with coeliac disease (CD) report a lower level of well-being than women without the disease and men with the disease. The all-embracing aim of the thesis was to study experiences of living with coeliac disease in remission and to discover whether a patient education intervention can influence the perceived health and daily life of women with coeliac disease. Methods: Studies I-IV were based on the same sample, a total population of 106 women, > 20 years old, with confirmed CD, who had been treated with a GFD for a minimum of five years. From the total population of 106, 15 and 14 purposefully selected women were included in studies I and IV respectively, which had a phenomenological approach by which data was collected through recorded personal narrative interviews. The participants in studies II & III, comprising the total sample of 106 women, were randomized to one of two groups: either to the intervention group (n=54) that underwent a ten-session patient education (PE) program with problem based learning (PBL), or to a control group (n=52) that received information regarding CD, which was sent to their home on a regular basis. Data was collected by self-administered questionnaires. Study V included 22 purposefully selected people (11 women and 11 men) with confirmed CD that had experienced any kind of residual discomfort despite treatment for at least five years with a GFD. Data was collected by recorded semistructured interviews. Well-being (II-III) was assessed at baseline and after 10 weeks in all patients and after six months in the intervention group using the Psychological General Well-Being index and the Gastrointestinal Symptom Rating Scale. The interviews (I & IV), which were carried out before the start of the PE (I) and within two weeks of completion of the PE program and about three months after the first interview (IV), were analysed with descriptive phenomenology. The data from study V was analysed by content analysis. Results: In the results, the experience of living with CD in remission was described by participants as a constant quest for a normal life (I, V). Three constituents representing conditions necessary to achieve a normalised lifeworld were described (I) as: being secure, being in control, and being seen and included. The balance of thoughts in relation to these constituents proved to be crucial for the individual woman’s ability to experience a normal life, despite the disease. Participants described (V) conditions facilitating the opportunities to live a normal life, but also various barriers to reaching this goal. The results from the PE based on PBL (II-III) showed that the PE improved psychological well-being (II) and GI (III) in women with CD to some extent, but not sufficiently as the improvement reached normative values for women only at 10 weeks regarding PGWB mean total index, and at no point in time regarding GSRS mean total index. The effect had waned at the follow-up six months after the intervention was completed as regards the women’s psychological well-being. In coping with CD, it seems essential for women to interact with others with the same disease (IV). The interaction made women feel individually strengthened, and provided them with a broader perspective on life with CD. As a result, this strengthened their sense of self in relation to the disease. Knowledge given by other participants and experts could result in both relief and anxiety. The results from the PE based on PBL (II-III) showed that the PE improved psychological well-being (II) and GI (III) in women with CD to some extent, but not sufficiently as the improvement reached normative values for women only at 10 weeks regarding PGWB mean total index, and at no point in time regarding GSRS mean total index. The effect had waned at the follow-up six months after the intervention was completed as regards the women’s psychological well-being. In coping with CD, it seems essential for women to interact with others with the same disease (IV). The interaction made women feel individually strengthened, and provided them with a broader perspective on life with CD. As a result, this strengthened their sense of self in relation to the disease. Knowledge given by other participants and experts could result in both relief and anxiety.

Objectives: Managed care organizations reduce healthcare costs and may improve patient health outcomes by encouraging better control of prevalent chronic diseases. The purpose of this study was to determine whether changing from a fee-for-service program to a capitated managed care program improved medication adherence for Medicaid patients in Kentucky with hypertension, hypercholesterolemia, or type 2 diabetes. Methods: We conducted a quasi-experimental study of patients enrolled in Kentucky Medicaid to evaluate the impact of transitioning to capitated managed care in November 2011. Medication adherence was measured using the proportion of days covered (PDC) method. Multivariable analyses measured the adjusted differences in adherence as a result of the implementation of capitated managed care. Results: Adjusted analyses indicate an average decrease in PDC by about 17-22 days of therapy coverage in the post-policy time period. However, no significant difference in adherence rate changes between the treatment and control populations were observed. Conclusions: Results indicate clinically inconclusive evidence regarding the immediate effect of the implementation of Medicaid managed care in Kentucky on medication adherence rates in patients with prevalent chronic diseases. There is a need to address the decline in average adherence rates, and the efficacy of Medicaid managed care based on medication adherence.

This thesis describes the development of the idea of an 'obesity epidemic' that figures prominently in contemporary public health discourse. It uses conceptual approaches from Science and Technology Studies and the history of medicine to analyse changing ideas about obesity, particularly as formulated and mobilised by British researchers from the 1960s onwards, to show how excess body weight became understood as a significant public health problem in this period. The thesis begins by describing the post-war refocusing of medical attention in developed countries from infectious diseases, the rates of which are falling, to chronic disease such as heart disease, diabetes, cancer and stroke. Heart disease, in particular, became seen as an 'epidemic'. After World War II, increase research funding by the American government made possible the development of a new research method - the long-term prospective epidemiological study - and a new way of understanding chronic diseases as caused by risk factors such as high blood pressure, cigarette smoking and high blood cholesterol. Excess body weight was includes in this list of risk factors, and so became an object in increased medical attention. The thesis then outlines how a new public health coalition was formed around obesity in the 1970s by British biomedical researchers working on topics in the fields of nutrition, diabetes and coronary heart disease. It describes the development of what I call the 'individual paradigm' of obesity which characterises the condition as an individual problem that leads to heart disease and mechanical complaints and is treatable by weight loss diets. It then describes two key features of British obesity science in the 1980s and 1990s. The first of these is the adoption of the Body Mass Index and the standard cut-off points that are used to define overweight and obesity, which together facilitate the collection and dissemination of data on changes in average body weights, The second is the energy balance model of weight regulation, which served to unify the diverse disciplinary approaches to biomedical research incorporated into this new knowledge, but which could not account for the high rates of failure acknowledged as occurring with conventional treatments such as weight loss diets, anorectic drugs and bariatric surgery. The thesis describes how researchers in the field of obesity science than extended their institutional research to participate in the production of a series of reports for the World Health Organization, including one on the global epidemic of obesity published in 2000. This new platform, combined with data produced by prospective studies, enabled them to disseminate a new understanding of obesity and overweight - what I call the 'environmental paradigm' - which characterises it as a global health problem associated with an increased risk of many diseases and caused by structural factors such as inappropriate diet and sedentary lifestyles. Despite refocusing attention of structural determinants of ill health, however, public health experts were constrained by considerations of political practicality and commercial interest when calling for preventive measures in the areas of diet and physical activity. The thesis concludes by considering the different ways in which scholars have theorised the epidemiological transition from infectious to chronic disease. Drawing on approaches from the health inequalities literature, it argues that the conventional framings of chronic disease epidemiology have tended systematically to obscure structural links between obesity and other forms of diet-related ill health on the one hand, and relative poverty on the other.

The purpose of this study was to test the relationships between and among the concepts of severity of illness, dependency, uncertainty, functional status and the mediators of self-esteem and mastery relative to the outcome of wellbeing. The conceptual framework was adapted from various sources in the literature which support the concept of wellbeing as an important outcome in arthritis. Evidence also supports self-esteem and mastery as mediators of the chronic illness experience. Dependency, uncertainty and functional status have been shown to be predictors of wellbeing but have never been tested as a complete paradigm. The sample for the study was 128 patients with either rheumatoid arthritis or osteoarthritis. Subjects completed 7 questionnaires which measured the 7 variables under study. Descriptive statistics were used to examine the demographic characteristics of the sample. Multiple regression technique was used to empirically test the predicted theoretical concepts and to estimate predictive validity for the theoretical concepts. The results demonstrated that when self-esteem was used in the causal model, 58% of the variance in wellbeing was explained by self-esteem and uncertainty. When mastery was included instead of self-esteem 52% of the variance of wellbeing was explained by mastery and uncertainty. When tested as mediators, both self-esteem and mastery emerged as significant mediators of dependency, uncertainty and functional status relative to wellbeing. These results are of clinical use to nurses who, by virtue of working with these patients on a daily basis, are in a position to intervene with actions which encourage positive self-esteem and maintain mastery over the environment. If these actions are successful, then wellbeing can be maintained for those patients diagnosed with arthritis.

Alzheimer's disease is the most common form (~60-80%) of dementia, currently affecting approximately half a million people in the UK and ~30 million people worldwide. The autosomal dominant form of AD represents a small proportion (~1-2%) of AD cases and is genetically well characterised. The vast majority of AD cases that show symptoms later in life (>65 years of age) are genetically complex. This type of AD, also known as late onset Alzheimer's disease (LOAD) disease, is still highly heritable with an estimated heritability of up to 76% (Gatz et al., 2006). Unfortunately, there is no cure for this devastating disease. Investigating genetic factors influencing the risk of LOAD is imperative for development of effective therapeutic treatments and more accurate diagnosis. A cross-platform comparison of four Genome-wide association studies (GWAS) was performed in an effort to identify novel genetic associations with LOAD (Chapter 3). A TRIM15 SNP rs929156 demonstrated significant evidence of association with LOAD with a p-value approaching genome-wide significance (p = 8.77 x 10-8) and an odds ratio that showed consistent effect on risk (OR = 1.1, p = 0.03). Within this chapter, a bio-informatic program to automate the process of GWAS meta-analysis taking into account linkage disequilibrium (LD) is also presented. Subsequently two fragments of the TRIM15 gene (including both 5’ and 3’ end flanking regions) were sequenced using the ABI SOLiDTM next generation sequencing technology. This was a pilot study using a DNA pooling strategy to determine whether this region harbours multiple rare variants which are associated with the disease (Chapter 4). Lastly, a candidate gene study combined with whole genome analysis was performed in an effort to search for genetic variants influencing human ageing using LOAD GWAS data (Chapter 5).