Algebraically determined topologies on permutation groups

In this paper we answer several questions of Dikran Dikranjan about algebraically determined topologies on the group of (finitely supported) permutations of a set X.Comment: 10 page

Can shared care deliver better outcomes for patients undergoing total hip replacement? A prospective assessment of patient outcomes and associated service use

OBJECTIVES: To assess whether shared care for patients undergoing total hip replacement delivers better outcomes compared to care as usual. DESIGN: Prospective, observational cohort study. SETTING: Two regions in The Netherlands where different organisational health care models have been implemented: a shared care setting (experimental group) and a care as usual setting (control group). PATIENTS: One hundred and fifteen patients undergoing total hip replacement: 56 in the experimental group and 59 in the control group. MAIN MEASURES: Functional health status according to the sickness impact profile, hip function, patient satisfaction and use of health care services. RESULTS: Two weeks before hip replacement both groups were comparable concerning patient characteristics, hip function and health status. The mean improvement of the total sickness impact profile score between two weeks before hip replacement and six months after was -1.92 in the shared care group, compared to -5.11 in care as usual group, a difference in favour of the control group (p=0.02). The mean length of hospital stay was comparable in both settings: 12.8 days in the shared care group and 13.2 days in the care as usual group. After hip replacement, compared to care as usual, patients in the shared care group received more homecare, with a higher frequency, and for a longer period of time. No differences in patient satisfaction between the two groups were found. CONCLUSIONS: Six months after hip replacement, the health status of patients in the care as usual group, using significantly less home care, was better than the status of patients in the shared care group. DISCUSSION: The utilisation of home care after hip replacement should be critically appraised in view of the need to stimulate patients' independence

What do guidelines and systematic reviews tell us about the management of medically unexplained symptoms in primary care?

Medically unexplained symptoms (MUS) are symptoms for which the origin remains unclear despite adequate history taking, physical examination, and additional investigations.1 An estimated 3–11% of patients visiting general practice repeatedly consult their GP for MUS.2,3 MUS exist along a continuum ranging from self-limiting symptoms, to recurrent and persistent symptoms, through to symptom disorders.4 Although there are various terms for the condition, for example unexplained physical symptoms, functional symptoms, or somatoform symptoms, we have chosen to use MUS in this article because this is the most frequently used term. This review aims to address current problems with the management of undifferentiated MUS; specific syndromes within the MUS spectrum, such as chronic fatigue syndrome and irritable bowel syndrome, are excluded from discussion. Patients with persistent MUS suffer from their symptoms, are functionally impaired, and are at risk of potentially harmful additional testing and treatment.5 Furthermore, these patients commonly express dissatisfaction with the medical care they receive during their illness.6 They feel stigmatised and not taken seriously.7 GPs often experience patients with persistent MUS as difficult and frustrating to manage.8 In addition, MUS are associated with reduced health-related quality of life, higher healthcare and social costs, and costs associated with lost productivity.9,10 The effects of many treatment strategies have been studied in recent decades. However, not all interventions are acceptable or feasible in routine primary care. In the light of the central role of the GP in managing MUS, we will discuss the importance of consultation skills and the effects of specific treatments in primary care. We will do this by way of a narrative review using available national guidelines and Cochrane Reviews in this field

“Medically unexplained” symptoms and symptom disorders in primary care: prognosis-based recognition and classification

Background: Many patients consult their GP because they experience bodily symptoms. In a substantial proportion of cases, the clinical picture does not meet the existing diagnostic criteria for diseases or disorders. This may be because symptoms are recent and evolving or because symptoms are persistent but, either by their character or the negative results of clinical investigation cannot be attributed to disease: so-called “medically unexplained symptoms” (MUS). MUS are inconsistently recognised, diagnosed and managed in primary care. The specialist classification systems for MUS pose several problems in a primary care setting. The systems generally require great certainty about presence or absence of physical disease, they tend to be mind-body dualistic, and they view symptoms from a narrow specialty determined perspective. We need a new classification of MUS in primary care; a classification that better supports clinical decision-making, creates clearer communication and provides scientific underpinning of research to ensure effective interventions. Discussion: We propose a classification of symptoms that places greater emphasis on prognostic factors. Prognosis-based classification aims to categorise the patient’s risk of ongoing symptoms, complications, increased healthcare use or disability because of the symptoms. Current evidence suggests several factors which may be used: symptom characteristics such as: number, multi-system pattern, frequency, severity. Other factors are: concurrent mental disorders, psychological features and demographic data. We discuss how these characteristics may be used to classify symptoms into three groups: self-limiting symptoms, recurrent and persistent symptoms, and symptom disorders. The middle group is especially relevant in primary care; as these patients generally have reduced quality of life but often go unrecognised and are at risk of iatrogenic harm. The presented characteristics do not contain immediately obvious cut-points, and the assessment of prognosis depends on a combination of several factors. Conclusion: Three criteria (multiple symptoms, multiple systems, multiple times) may support the classification into good, intermediate and poor prognosis when dealing with symptoms in primary care. The proposed new classification specifically targets the patient population in primary care and may provide a rational framework for decision-making in clinical practice and for epidemiologic and clinical research of symptoms

Corrigendum : Different Strokes for Different Folks: The BodyMind Approach as a Learning Tool for Patients With Medically Unexplained Symptoms to Self-Manage

© 2019 Payne and Brooks. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.In the original article, there was an error regarding the cost of medically unexplained symptoms (MUS). A correction has been made to the Abstract: “Medically unexplained symptoms (MUS) are common in both primary and secondary health care. It is gradually being acknowledged that there needs to be a variety of interventions for patients with MUS tomeet the needs of different groups of patients with such chronic long-termsymptoms. The proposed intervention described herewith is called The BodyMind Approach (TBMA) and promotes learning for self-management through establishing a dynamic and continuous process of emotional self-regulation. The problem is the mismatch between the patient’s mind-set and profile and current interventions. This theoretical article, based on practice-based evidence, takes forward the idea that different approaches (other than cognitive behavioral therapy) are required for people with MUS. The mind-set and characteristics of patients with MUS are reflected upon to shape the rationale and design of this novel approach. Improving services for this population in primary care is crucial to prevent the iterative spiraling downward of frequent general practitioner (GP) visits, hospital appointments, and accident and emergency attendance (A&E), all of which are common for these patients. The approach derives from embodied psychotherapy (authentic movement in dance movement psychotherapy) and adult models of learning for self-management. It has been developed from research and practice-based evidence. In this article the problem of MUS in primary care is introduced and the importance of the reluctance of patients to accept a psychological/mental health referral in the first instance is drawn out. A description of the theoretical underpinnings and philosophy of the proposed alternative to current interventions is then presented related to the design, delivery, facilitation, and educational content of the program. The unique intervention is also described to give the reader a flavor.” Additionally, a correction has been made to the Introduction, paragraph one: “Medically unexplained symptoms (MUS) are a thorny issue in primary care. Despite the differing nomenclature, the recent DSM-5 terms it as somatic symptom disorder (SSD) but is yet to achieve general usage. Many general practitioners (GPs) appear to reliably recognize MUS without the need for standardized assessments (Rasmussen et al., 2008). This population present with many, various and nebulous physical and psychological ailments (Rosendal et al., 2005) and constitute more than 25% of all new hospital and GP appointments (Fink et al., 1999; Reid et al., 2001). In England MUS has been estimated to cost £3 billion in 2008–2009 rising to £18 billion if loss of productivity, benefits and quality of life are accounted for Bermingham et al. (2010).” The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.Peer reviewedFinal Published versio

Predictors of persistent medically unexplained physical symptoms: findings from a general population study

Objective: To explore the course persistency of Medically Unexplained Symptoms (MUS) and its prognostics factors in the general adult population. Knowledge of prognostic factors of MUS may indicate possible avenues for intervention development. Methods: Data were derived from the Netherlands Mental Health Survey and Incidence Study-2 (NEMESIS-2), a nationally representative face-to-face cohort study among the Dutch general population aged 18-64 years. We selected subjects with MUS at baseline and who participated at follow-up (N=324) and reassessed those subjects for having MUS at three year follow-up. Logistic regression analyses were used to determine risk factors for persistency of MUS. Results: 36.4% of the subjects had persistent MUS at follow-up. In logistic regression analyses adjusted for sex and age, persistency of MUS was predicted by the number of comorbid chronic medical disorder(s), lower education, female sex, not having a paid job, parental psychopathology as well as lower functioning. In the logistic regression analysis in which all significant variables adjusted for sex and age were entered simultaneously, three variables predicted persistent MUS: parental psychopathology, the number of comorbid chronic medical disorder(s) and physical functioning, with odds ratios of 2.01 (1.20-3.38), 1.19 (1.01-1.40) and 0.99 (0.97-1.00), respectively. Conclusion: In the adult general population, MUS were persistent in over one third of the subjects with MUS at baseline. Persistency was uniquely significantly predicted by parental psychopathology, number of comorbid chronic medical disorders and physical functioning. These findings warrant further research into early intervention and treatment options for persons with an increased risk of persistent MUS

Systematic review of measurement properties of questionnaires measuring somatization in primary care patients

Objective The aim of this review is to critically appraise the evidence on measurement properties of self-report questionnaires measuring somatization in adult primary care patients and to provide recommendations about which questionnaires are most useful for this purpose. Methods We assessed the methodological quality of included studies using the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) checklist. To draw overall conclusions about the quality of the questionnaires, we conducted an evidence synthesis using predefined criteria for judging the measurement properties. Results We found 24 articles on 9 questionnaires. Studies on the Patient Health Questionnaire-15 (PHQ-15) and the Four-Dimensional Symptom Questionnaire (4DSQ) somatization subscale prevailed and covered the broadest range of measurement properties. These questionnaires had the best internal consistency, test-retest reliability, structural validity, and construct validity. The PHQ-15 also had good criterion validity, whereas the 4DSQ somatization subscale was validated in several languages. The Bodily Distress Syndrome (BDS) checklist had good internal consistency and structural validity. Some evidence was found for good construct validity and criterion validity of the Physical Symptom Checklist (PSC-51) and good construct validity of the Symptom Check-List (SCL-90-R) somatization subscale. However, these three questionnaires were only studied in a small number of primary care studies. Conclusion Based on our findings, we recommend the use of either the PHQ-15 or 4DSQ somatization subscale for somatization in primary care. Other questionnaires, such as the BDS checklist, PSC-51 and the SCL-90-R somatization subscale show promising results but have not been studied extensively in primary care. © 2017 Elsevier Inc

Demographic characteristics and quality of life of patients with unexplained complaints: a descriptive study in general practice

OBJECTIVE: About 13% of GPs' consultations involve unexplained complaints (UCs). These complaints can progress to chronic conditions like medically unexplained symptoms, chronic functional symptoms or somatoform disorders. Little is known about the demographic characteristics and quality of life of patients with early stage UCs. Our study objective was to describe these characteristics. Additionally we compared them with other patient groups to serve as a frame of reference. METHODS: Descriptive study in general practices. Patients with early stage UCs who had not had elaborate diagnostic investigations were included. Demographic characteristics were compared to a Dutch general practice population. Quality of life scores were measured with the RAND-36 and compared to another Dutch general practice population and to depressed patients. RESULTS: Data of 466 patients were available for analysis. Mean age was 44 years and 74% were females, mostly higher educated. Of the patients, 63% presented with unexplained fatigue. On average, quality of life was poor (mean RAND-36 domain scores 37-73), also in comparison with other groups. CONCLUSION: General practice patients presenting with UCs have a remarkably poor quality of life. Future research should explore how early identification of patients at risk of developing chronicity can take place. Awareness of potential poor quality of life may influence GPs' medical decision makin

Effects of lowering body temperature via hyperhydration, with and without glycerol ingestion and practical precooling on cycling time trial performance in hot and humid conditions

Background: Hypohydration and hyperthermia are factors that may contribute to fatigue and impairment of endurance performance. The purpose of this study was to investigate the effectiveness of combining glycerol hyperhydration and an established precooling technique on cycling time trial performance in hot environmental conditions.Methods: Twelve well-trained male cyclists performed three 46.4-km laboratory-based cycling trials that included two climbs, under hot and humid environmental conditions (33.3 ± 1.1°C; 50 ± 6% r.h.). Subjects were required to hyperhydrate with 25 g.kg-1 body mass (BM) of a 4°C beverage containing 6% carbohydrate (CON) 2.5 h prior to the time trial. On two occasions, subjects were also exposed to an established precooling technique (PC) 60 min prior to the time trial, involving 14 g.kg-1 BM ice slurry ingestion and applied iced towels over 30 min. During one PC trial, 1.2 g.kg-1 BM glycerol was added to the hyperhydration beverage in a double-blind fashion (PC+G). Statistics used in this study involve the combination of traditional probability statistics and a magnitude-based inference approach.Results: Hyperhydration resulted in large reductions (-0.6 to -0.7°C) in rectal temperature. The addition of glycerol to this solution also lowered urine output (330 ml, 10%). Precooling induced further small (-0.3°C) to moderate (-0.4°C) reductions in rectal temperature with PC and PC+G treatments, respectively, when compared with CON (0.0°C, P\u3c0.05). Overall, PC+G failed to achieve a clear change in cycling performance over CON, but PC showed a possible 2% (30 s, P=0.02) improvement in performance time on climb 2 compared to CON. This improvement was attributed to subjects\u27 lower perception of effort reported over the first 10 km of the trial, despite no clear performance change during this time. No differences were detected in any other physiological measurements throughout the time trial.Conclusions: Despite increasing fluid intake and reducing core temperature, performance and thermoregulatory benefits of a hyperhydration strategy with and without the addition of glycerol, plus practical precooling, were not superior to hyperhydration alone. Further research is warranted to further refine preparation strategies for athletes competing in thermally stressful events to optimize health and maximize performance outcomes