Bleeding events and associated factors in a cohort of adult patients taking warfarin in Sarawak, Malaysia.

Evidence is emerging that rates of adverse events in patients taking warfarin may vary with ethnicity. This study investigated the rates of bleeds and thromboembolic events, the international normalised ratio (INR) status and the relationship between INR and bleeding events in Malaysia. Patients attending INR clinic at the Heart Centre, Sarawak General Hospital were enrolled on an ad hoc basis from May 2010 and followed up for 1 year. At each routine visit, INR was recorded and screening for bleeding or thromboembolism occurred. Variables relating to INR control were used as predictors of bleeds in logistic regression models. 125 patients contributed to 140 person-years of follow-up. The rates of major bleed, thromboembolic event and minor bleed per 100 person-years of follow-up were 1.4, 0.75 and 34.3. The median time at target range calculated using the Rosendaal method was 61.6% (IQR 44.6­74.1%). Of the out-of-range readings, 30.0% were below range and 15.4% were above. INR variability, (standard deviation of individuals' mean INR), was the best predictor of bleeding events, with an odds ratio of 3.21 (95% CI 1.10­9.38). Low rates of both major bleeds and thromboembolic events were recorded, in addition to a substantial number of INR readings under the recommended target range. This may suggest that the recommended INR ranges may not represent the optimal warfarin intensity for this population and that a lower intensity of therapy, as observed in this cohort, could be beneficial in preventing adverse events.

The burden of common chronic disease on health-related quality of life in an elderly community-dwelling population in the UK.

BACKGROUND: Given the high prevalence of chronic conditions and multimorbidity in the elderly, there is a need to determine which chronic conditions have the greatest impact on health-related quality of life (HRQL) and identify where additional intervention may be required. OBJECTIVE: To explore the impact of a range of common chronic conditions on HRQL in a community-based population aged 65 years or more in the UK. METHODS: Secondary analysis of data derived from a large (n = 5849) cross-sectional study. HRQL was assessed using the EuroQoL EQ-5D. Multivariable models were used to estimate the relative effect of 15 individual common chronic conditions and combinations of these conditions on HRQL. RESULTS: Mean age of participants was 74.6 years, 49.2% were male. The mean EQ-5D index score was 0.78 (standard deviation 0.2), range -0.43 to 1.00. Overall, 53% (n = 3078) of the cohort reported problems with pain, 39% (n = 2273) with mobility and 9% (n = 529) with self-care. Multivariate modelling demonstrated that impaired HRQL was significantly associated with 13 of the 15 common chronic conditions studied. Clinically meaningful reductions in EQ-5D index scores were observed for osteoarthritis (-0.081, P = 0.0006), neurological disease (-0.172, P < 0.0001) and depression (-0.269, P < 0.001). CONCLUSIONS: This study quantifies the relative impact of 13 common chronic conditions on HRQL in a UK-based community-dwelling ageing population. Findings indicate that osteoarthritis, depression and neurological disease have a strong clinically important negative effect on HRQL. These findings may help clinical decision making and priority setting for management of individuals with multimorbidity.

A randomised controlled trial of a probiotic 'functional food' in the management of irritable bowel syndrome.

BACKGROUND: Irritable Bowel Syndrome (IBS) is a common condition characterised by pain, distension and altered bowel habit. Evidence suggests functional foods containing probiotics improve gastrointestinal transit, however, data are limited by short follow-up periods and evaluation in selected populations. METHODS: A multi-centre, randomized, double blind, controlled trial to evaluate the effect of a probiotic vs non-probiotic dairy product on symptoms in IBS with a constipation element (IBS-Constipation or IBS-Mixed profile). Set in 13 general practices within central England. Individuals meeting the ROME III criteria for IBS, aged 18-65 completed a pre-study diary. Eligible individuals were randomized to consume dairy 'yoghurt' products which either did or did not contain active probiotics twice daily and to complete a daily diary. Primary outcome was subjective global assessment of symptom relief at week 4. Other outcomes comprised, IBS symptom scores, pain, bloating and flatulence levels, stool frequency, stool consistency, ease of bowel movement and quality of life. RESULTS: 179 were randomized (91 active, 88 placebo). 76 (43 active, 33 placebo) completed the study. No significant between group differences existed at 4 weeks (57% active vs 53% placebo, reported adequate relief (p = 0.71)). By week 8, 46% active vs 68% placebo reported adequate relief (p = 0.03). This was sustained at week 12. CONCLUSIONS: Significant improvements were reported for most outcomes in all trial participants but improvement did not differ by group. This trial does not provide evidence for effectiveness of a probiotic in IBS, in variance with a body of published literature and review conclusions. Differential drop out may however cloud interpretation of data. UK TRIAL REGISTRATION: ISRCTN78863629.

The relationship between serum TSH and free T4 in older people.

The frequency distribution of serum thyroid stimulating hormone (TSH) shows a skewed pattern that may change with age. The set point of the hypothalamic-pituitary-thyroid axis for an individual is thought to be genetically determined and has been described as a log-linear relationship of serum TSH to free thyroxine (T4); however, the validity of this hypothesis has yet to be established in older people. The aim of the study was to describe the relationship between serum TSH and free T4 in older people and define factors influencing this relationship. We conducted a cross-sectional, observational study of thyroid function in a community population of older subjects over 65 years of age. The relationship between serum TSH and free T4 was not linear as previously described, but is best described as a fourth-order polynomial. Both gender and smoking status affected the relationship. This suggests that more complex modelling is required when investigating the hypothalamic-pituitary-thyroid axis.

Inappropriate 999 calls: an online pilot survey.

BACKGROUND: Abuse of ambulance services is high, and there is concern among healthcare professionals that misuse of ambulances places stress on services, which may jeopardise patient care. This study aims to determine the proportion of people who correctly identify appropriate situations to call for an ambulance, and determine the characteristics of those most likely to call inappropriately. METHODS: An online questionnaire presented 12 common scenarios that may require medical attention and required participants to identify when they would request an ambulance. Proportions correctly responding to each scenario were calculated and each respondent was given a total score. t-Tests compared mean scores between groups (with and without first aid (FA) training), and χ(2) tests compared between-group proportions of correct answers for scenarios. Backwards stepwise logistic regression analyses determined the characteristics of those most likely to call inappropriately. RESULTS: 150 respondents completed the questionnaire. 5.2-47.8% responded with an inappropriate answer, depending on the scenario. Almost all participants identified the need for an ambulance in 3/5 scenarios when it was required; however, fewer (74.8%) respondents identified the need for an ambulance to a suspected stroke. The majority correctly identified an ambulance was not required in only 2/7 scenarios. Those with FA training were less likely to call inappropriately in all scenarios (significant in three situations). However, no participant characteristics were predictive of calling an ambulance inappropriately once confounders were taken into account. CONCLUSIONS: The majority would call for an ambulance appropriately when a real emergency occurred, and most inappropriate classification occurs when an ambulance is not required.

Subclinical thyroid dysfunction symptoms in older adults: cross-sectional study in UK primary care.

BACKGROUND: Subclinical thyroid dysfunction - abnormal serum thyrotrophin (thyroid-stimulating hormone; TSH) concentrations with normal free thyroxine (FT4) is common in older people. It remains unclear whether individuals with subclinical serum status experience an increased symptom profile. AIM: To compare the prevalence of those symptoms typically associated with overt thyroid dysfunction in older individuals with a subclinical and euthyroid serum profile. DESIGN AND SETTING: Cross-sectional study, nested within the Birmingham Elderly Thyroid Study (BETS); from 19 UK general practices. METHOD: Adults living in a community setting (aged ≥65 years), without overt thyroid dysfunction or associated treatment, self-reported the presence or absence of 18 symptoms (while serum result naïve). Serum concentrations of TSH and FT4 were measured to establish thyroid status. RESULTS: A total of 2870 individuals were screened: 2703 (94%) were categorised as euthyroid (normal), 29 (1%) subclinically hyperthyroid, and 138 (5%) subclinically hypothyroid. Symptoms were common in all groups. No significant differences in the prevalence of individual symptoms were observed between the euthyroid and subclinically hypothyroid groups nor in comparison with the subclinically hyperthyroid group. Multivariate logistic regression analysis failed to reveal an association between individual or multiple symptoms and subclinical status. CONCLUSION: Findings suggest that subclinical thyroid dysfunction does not confer a symptom burden in older individuals and support adherence to guidelines in the non-treatment of subclinical thyroid dysfunction. GPs may use the findings to reassure older people presenting with symptoms that subclinical thyroid dysfunction is an unlikely explanation. The presence of persistently abnormal TSH concentrations may be linked to long-term risks of cardiovascular disease, especially atrial fibrillation, but whether this should prompt treatment and whether such treatment alters vascular outcomes is unknown.

Evaluation of the Birmingham IBS symptom questionnaire.

BACKGROUND: Irritable Bowel Syndrome (IBS) is a chronic/common condition that causes a significant effect on the individual (reduced quality of life), society (time lost off work) and health services. Comparison of studies evaluating the management of IBS has been hindered by the lack of a widely adopted validated symptom score. The aim of this study was to develop and validate a disease specific score to measure the symptoms of patients with IBS. METHODS: A self-administered 14-item symptom questionnaire (based on Rome II criteria) was mailed to 533 persons included in a prevalence study of IBS. The reliability of each underlying dimension identified was measured by Cronbach's alpha. Validity was assessed by comparing symptom scores with concurrent IBS specific quality of life (QoL) scores. Reproducibility was measured by the test-retest method and responsiveness measured by effect size. RESULTS: 379 (71%) questionnaires were returned. The underlying dimensions identified were pain, diarrhoea and constipation. Cronbach's alpha was 0.74 for pain, 0.90 for diarrhoea and 0.79 for constipation. Pain and diarrhoea dimensions had good external validity (r = -0.3 to -0.6), constipation dimension had moderate external validity (r = -0.2 to -0.3). All dimensions were reproducible (ICCs 0.75 to 0.81). Effect sizes of 0.27 to 0.53 were calculated for those with a reported improvement in symptoms. CONCLUSION: The Birmingham IBS Symptom Questionnaire has been developed and tested. It has been shown to be suitable for self-completion and acceptable to patients. The questionnaire has 3 internal dimensions which have good reliability, external validity and are responsive to a change in health status.

Medical students' attitudes to psychiatric illness in primary care.

CONTEXT: Previous research has shown that general practitioners (GPs) hold negative attitudes towards patients with schizophrenia, which do not simply reflect the nature or chronic aspects of the illness. This study aimed to describe the attitudes and predicted behaviour of medical students towards patients with mental illness in a primary care setting and to investigate whether these were affected by the students' level of training. METHODS: A sample of 1239 students from the University of Birmingham Medical School were each given one of four case vignettes, all of which were identical except that the patient involved was described as having a previous diagnosis of, respectively, schizophrenia, depression, diabetes or no illness. Students rated their level of agreement with 12 attitudinal statements relating to the vignette. RESULTS: A total of 1081 (88%) students responded to the questionnaire. Students were generally less favourable in their responses to patients with either schizophrenia or depression. They would not be as happy to have them on their list, believed they would consume more time and considered they would be less likely to comply with advice and treatment. They expressed more concern about the risk of violence, the potential welfare of children and the possibility of illegal drug and excessive alcohol use. General clinical and psychiatric training had little effect on these reactions. CONCLUSIONS: Patients with mental illness provoke less favourable responses in medical students, which are not altered by furthering education. Undergraduate primary care-based mental health education should be re-evaluated to ensure that students develop an empathetic and positive approach to mental health patients and their treatment.

Effects of exposure to mental illness in role-play on undergraduate student attitudes.

BACKGROUND: Education is integral to reducing stigma toward the mentally ill. Medical educators have a key role in delivering education that reduces that stigma. Undergraduate psychiatric training and specific education programs are both effective in reducing stigma. However, many students are exposed to concepts of mental illness at a much earlier stage in their education. No previous study has explored the effect of intervention such as role-play on student attitudinal development. OBJECTIVES: This study's objective was to identify whether undergraduate role-play exercises featuring mental illness influenced development of attitudes toward the mentally ill. METHODS: A randomized controlled trial was used to compare attitudinal scores between students exposed to a mental illness role-play as part of routine teaching and a control group that did not receive the teaching. RESULTS: A total of 332 students provided data. There were no between-group differences for any attitudinal scores, although gender (being female) and experience of mental illness were associated with more positive attitudinal scores. CONCLUSIONS: Single high-intensity routine teaching sessions such as role-play involving metal illness do not influence student attitudes.

Is subclinical thyroid dysfunction in the elderly associated with depression or cognitive dysfunction?

BACKGROUND: Widespread use of automated sensitive assays for thyroid hormones and thyroid-stimulating hormone (TSH) has increased identification of mild thyroid dysfunction, especially in elderly patients. The clinical significance of this dysfunction, however, remains uncertain, and associations with cognitive impairment, depression, and anxiety are unconfirmed. OBJECTIVE: To determine the association between mild thyroid dysfunction and cognition, depression, and anxiety in elderly persons. DESIGN: Cross-sectional study. Associations were explored through mixed-model analyses. SETTING: Primary care practices in central England. PATIENTS: 5865 patients 65 years of age or older with no known thyroid disease who were recruited from primary care registers. MEASUREMENTS: Serum TSH and free thyroxine (T4) were measured. Depression and anxiety were assessed by using the Hospital Anxiety and Depression Scale (HADS), and cognitive functioning was established by using the Middlesex Elderly Assessment of Mental State and the Folstein Mini-Mental State Examination. Comorbid conditions, medication use, and sociodemographic profiles were recorded. RESULTS: 295 patients met the criteria for subclinical thyroid dysfunction (127 were hyperthyroid, and 168 were hypothyroid). After confounding variables were controlled for, statistically significant associations were seen between anxiety (HADS score) and TSH level (P = 0.013) and between cognition and both TSH and free T4 levels. The magnitude of these associations lacked clinical relevance: A 50-mIU/L increase in the TSH level was associated with a 1-point reduction in the HADS anxiety score, and a 1-point increase in the Mini-Mental State Examination score was associated with an increase of 50 mIU/L in the TSH level or 25 pmol/L in the free T4 level. LIMITATIONS: Because of the low participation rate, low prevalence of subclinical thyroid dysfunction, and other unidentified recruitment biases, participants may not be representative of the elderly population. CONCLUSIONS: After the confounding effects of comorbid conditions and use of medication were controlled for, subclinical thyroid dysfunction was not associated with depression, anxiety, or cognition.

Prevalence of subclinical thyroid dysfunction and its relation to socioeconomic deprivation in the elderly: a community-based cross-sectional survey.

CONTEXT: Population-based screening has been advocated for subclinical thyroid dysfunction in the elderly because the disorder is perceived to be common, and health benefits may be accrued by detection and treatment. OBJECTIVE: The objective of the study was to determine the prevalence of subclinical thyroid dysfunction and unidentified overt thyroid dysfunction in an elderly population. DESIGN, SETTING, AND PARTICIPANTS: A cross-sectional survey of a community sample of participants aged 65 yr and older registered with 20 family practices in the United Kingdom. EXCLUSIONS: Exclusions included current therapy for thyroid disease, thyroid surgery, or treatment within 12 months. OUTCOME MEASURE: Tests of thyroid function (TSH concentration and free T4 concentration in all, with measurement of free T3 in those with low TSH) were conducted. EXPLANATORY VARIABLES: These included all current medical diagnoses and drug therapies, age, gender, and socioeconomic deprivation (Index of Multiple Deprivation, 2004). ANALYSIS: Standardized prevalence rates were analyzed. Logistic regression modeling was used to determine factors associated with the presence of subclinical thyroid dysfunction. RESULTS: A total of 5960 attended for screening. Using biochemical definitions, 94.2% [95% confidence interval (CI) 93.8-94.6%] were euthyroid. Unidentified overt hyper- and hypothyroidism were uncommon (0.3, 0.4%, respectively). Subclinical hyperthyroidism and hypothyroidism were identified with similar frequency (2.1%, 95% CI 1.8-2.3%; 2.9%, 95% CI 2.6-3.1%, respectively). Subclinical thyroid dysfunction was more common in females (P < 0.001) and with increasing age (P < 0.001). After allowing for comorbidities, concurrent drug therapies, age, and gender, an association between subclinical hyperthyroidism and a composite measure of socioeconomic deprivation remained. CONCLUSIONS: Undiagnosed overt thyroid dysfunction is uncommon. The prevalence of subclinical thyroid dysfunction is 5%. We have, for the first time, identified an independent association between the prevalence of subclinical thyroid dysfunction and deprivation that cannot be explained solely by the greater burden of chronic disease and/or consequent drug therapies in the deprived population.

Why are GPs treating subclinical hypothyroidism? Case note review and GP survey.

BACKGROUND: Subclinical hypothyroidism (SCHo) is a common biochemical diagnosis in older age. Evidence of impact is inconclusive and guidelines are inconsistent. With increasing numbers of thyroid function tests (TFTs) performed, GPs frequently have to make management decisions regarding this diagnosis. However, little is known about how SCHo is currently being managed in primary care. AIM: To explore management of SCHo in primary care and GP reported rationale for treatment of SCHo in older individuals. DESIGN: Descriptive study using retrospective case note review and GP survey. SETTING: Nineteen General Practices, Central England, UK. METHODS: Follow-up of a large cohort with subsequent detailed review of individuals for whom therapy had been initiated following diagnosis of SCHo. Data on practice policies, and rationale behind treatment were collected via GP questionnaire. RESULTS: Forty-two individuals were treated following identification of SCHo. Factors regarded as supporting instigation of therapy recorded by practitioners included symptoms, a positive antithyroid antibody test and history of radioiodine therapy. In all, 55% were registered at 3/19 practices suggesting significant between practice variation. Reasons for testing included chronic disease check-up (n = 14), presenting 'thyroid symptoms' (n = 5) and presenting other symptoms (n = 9). Reasons for therapy initiation were only recorded in 26 cases and included presence of symptoms, persistently high or increasing serum thyroid stimulating hormone concentration and patient request. Only 2/15 GPs reported having practice guidelines on management. CONCLUSION: Results suggest that GPs are uncertain how to interpret symptoms and TFT results in older individuals. There is considerable variation in management of SCHo between GPs with some GPs treating patients outside of all guideline recommendations.

The relationship between serum TSH and free T4 in older people.

The frequency distribution of serum thyroid stimulating hormone (TSH) shows a skewed pattern that may change with age. The set point of the hypothalamic-pituitary-thyroid axis for an individual is thought to be genetically determined and has been described as a log-linear relationship of serum TSH to free thyroxine (T4); however, the validity of this hypothesis has yet to be established in older people. The aim of the study was to describe the relationship between serum TSH and free T4 in older people and define factors influencing this relationship. We conducted a cross-sectional, observational study of thyroid function in a community population of older subjects over 65 years of age. The relationship between serum TSH and free T4 was not linear as previously described, but is best described as a fourth-order polynomial. Both gender and smoking status affected the relationship. This suggests that more complex modelling is required when investigating the hypothalamic-pituitary-thyroid axis.