How is atrial fibrillation detected in everyday healthcare? Results of a Dutch cohort study

BACKGROUND

Atrial fibrillation (AF) is a common arrhythmia with serious potential consequences when left untreated. For timely treatment, early detection is imperative. We explored how new AF is detected in patients aged ≥ 65 years in Dutch healthcare.

METHODS

The study cohort consisted of 9526 patients from 49 Dutch general practices in the usual-care arm of the Detecting and Diagnosing Atrial Fibrillation study. We automatically extracted data from the electronic medical records and reviewed individual records of patients who developed AF. Patient selection started in 2015, and data collection ended in 2019.

RESULTS

We included 258 patients with newly diagnosed AF. In 55.0% of the patients, the irregular heartbeat was first observed in general practice and in 16.3% in the cardiology department. Cardiologists diagnosed most cases (47.3%), followed by general practitioners (GPs; 33.7%). AF detection was triggered by symptoms in 64.7% of the patients and by previous stroke in 3.5%. Overall, patients aged 65-74 years more often presented with symptoms than those aged ≥ 75 years (73.5% vs 60.6%; p = 0.042). In 31.5% of the patients, AF was diagnosed incidentally ('silent AF'). Silent-AF patients were on average 2 years older than symptomatic-AF patients. GPs less often diagnosed silent AF than symptomatic AF (21.0% vs 39.0%; p = 0.008), whereas physicians other than GPs or cardiologists more often diagnosed symptomatic AF than silent AF (34.6% vs 11.9%; p < 0.001). Most diagnoses were based on a 12-lead electrocardiogram (93.8%).

CONCLUSION

Diagnosing AF is a multidisciplinary process. The irregular heartbeat was most often detected by the GP, but cardiologists diagnosed most cases. One-third of all newly diagnosed AF was silent.

How do Dutch general practitioners detect and diagnose atrial fibrillation? Results of an online case vignette study

Background

Detection and treatment of atrial fibrillation (AF) are important given the serious health consequences. AF may be silent or paroxysmal and remain undetected. It is unclear whether general practitioners (GPs) have appropriate equipment and optimally utilise it to detect AF. This case vignette study aimed to describe current practice and to explore possible improvements to optimise AF detection.

Methods

Between June and July 2017, we performed an online case vignette study among Dutch GPs. We aimed at obtaining at least 75 responses to the questionnaire. We collected demographics and asked GPs’ opinion on their knowledge and experience in diagnosing AF. GPs could indicate which diagnostic tools they have for AF. In six case vignettes with varying symptom frequency and physical signs, they could make diagnostic choices. The last questions covered screening and actions after diagnosing AF. We compared the answers to the Dutch guideline for GPs on AF.

Results

Seventy-six GPs completed the questionnaire. Seventy-four GPs (97%) thought they have enough knowledge and 72 (95%) enough experience to diagnose AF. Seventy-four GPs (97%) could order or perform ECGs without the interference of a cardiologist. In case of frequent symptoms of AF, 36–40% would choose short-term (i.e. 24–48 h) and 11–19% long-term (i.e. 7 days, 14 days or 1 month) monitoring. In case of non-frequent symptoms, 29–31% would choose short-term and 21–30% long-term monitoring. If opportunistic screening in primary care proves to be effective, 83% (58/70) will support it.

Conclusions

Responding GPs report to have adequate equipment, knowledge, and experience to detect and diagnose AF. Almost all participants can order ECGs. Reported monitoring duration was shorter than recommended by the guideline. AF detection could improve by increasing the monitoring duration.

Role of the Electronic Patient Record in the Development of General Practice in the Netherlands

From the end of the seventies practice computer systems have been introduced in Dutch general practice. In 1998 90% of the GPs had a practice computer and 60% used it for medical purposes, with good patient acceptance. Collaboration between pioneer GPs, professional organizations, academic institutions and software manufacturers has been of decisive importance. While the practice computer is early recognized as a powerful tool for administrative purposes, it is increasingly supporting clinical and preventive care, quality of care improvement, clinical training of students and vocational training of general practice trainees. Also for scientific research and practice supporting research, automatization has proven to be innovating. Much attention is paid to designing valid databases and database-related research. In addition, practice automatization has opened new perspectives for health policy and management. Further development of technical and methodological issues is needed, and, very importantly, of patients‘ and consumers’ involvement. EPR technology in general practice does not optimally work without good numerator and denominator data, and a good quality patient-doctor relationship over time. While the EPR is a useful tool to facilitate a better performance, it may enable the doctor to focus more on the health care essentials.

Multidisciplinary rehabilitation treatment versus cognitive behavioural therapy for patients with chronic fatigue syndrome: a randomized controlled trial

OBJECTIVES

The aim of this trial was to evaluate the difference in treatment effect, at 26 and 52 weeks after the start of treatment, between cognitive behavioural therapy (CBT) and multidisciplinary rehabilitation treatment (MRT) for patients with chronic fatigue syndrome (CFS).

DESIGN

Multicentre, randomized controlled trial of patients with CFS. Participants were randomly assigned to MRT or CBT.

SETTING

Four rehabilitation centres in the Netherlands.

SUBJECTS

A total of 122 patients participated in the trial.

MAIN OUTCOME MEASURES

Primary outcomes were fatigue measured by the fatigue subscale of the Checklist Individual Strength and health-related quality of life measured by the Short-Form 36. Outcomes were assessed prior to treatment and at 26 and 52 weeks after treatment initiation.

RESULTS

A total of 114 participants completed the assessment at 26 weeks, and 112 completed the assessment at 52 weeks. MRT was significantly more effective than CBT in reducing fatigue at 52 weeks. The estimated difference in fatigue between the two treatments was -3.02 [95% confidence interval (CI) -8.07 to 2.03; P = 0.24] at 26 weeks and -5.69 (95% CI -10.62 to -0.76; P = 0.02) at 52 weeks. Patients showed an improvement in quality of life over time, but between-group differences were not significant.

CONCLUSION

This study provides evidence that MRT is more effective in reducing long-term fatigue severity than CBT in patients with CFS. Although implementation in comparable populations can be recommended based on clinical effectiveness, it is advisable to analyse the cost-effectiveness and replicate these findings in another multicentre trial.

Towards a 'patient-centred' operationalisation of the new dynamic concept of health: a mixed methods study

OBJECTIVE

To evaluate among stakeholders the support for the new, dynamic concept of health, as published in 2011: 'Health as the ability to adapt and to self-manage', and to elaborate perceived indicators of health in order to make the concept measurable.

DESIGN

A mixed methods study: a qualitative first step with interviews and focus groups, followed by a quantitative survey.

PARTICIPANTS

Representatives of seven healthcare stakeholder domains, for example, healthcare providers, patients with a chronic condition and policymakers. The qualitative study involved 140 stakeholders; the survey 1938 participants.

RESULTS

The new concept was appreciated, as it addresses people as more than their illness and focuses on strengths rather than weaknesses. Caution is needed as the concept requires substantial personal input of which not everyone is capable. The qualitative study identified 556 health indicators, categorised into six dimensions: bodily functions, mental functions and perception, spiritual/existential dimension, quality of life, social and societal participation, and daily functioning, with 32 underlying aspects. The quantitative study showed all stakeholder groups considering bodily functions to represent health, whereas for other dimensions there were significant differences between groups. Patients considered all six dimensions almost equally important, thus preferring a broad concept of health, whereas physicians assessed health more narrowly and biomedically. In the qualitative study, 78% of respondents considered their health indicators to represent the concept.

CONCLUSIONS

To prevent confusion with health as 'absence of disease', we propose the use of the term 'positive health' for the broad perception of health with six dimensions, as preferred by patients. This broad perception deserves attention by healthcare providers as it may support shared decision-making in medical practice. For policymakers, the broad perception of 'positive health' is valuable as it bridges the gap between healthcare and the social domain, and by that it may demedicalise societal problems.

[What do older patients on polypharmacy know about their prescribed drugs?]

OBJECTIVE

To identify factors associated with appropriate knowledge about the indications for drugs prescribed to older patients on polypharmacy.

DESIGN

Cross-sectional study.

METHOD

In a primary care setting, patients aged 60 years and over who were taking five or more prescribed drugs simultaneously were asked about their medication by conducting home interviews and postal questionnaires. Multiple logistic regression analysis was used to evaluate the association between medication knowledge and explanatory variables such as medication use, sex, age, residential status and educational level.

RESULTS

Seven hundred and fifty-four participants, mean age 73.2 years, reported an average daily intake of nine (SD 3.0) prescribed drugs. Only 15% of the patients were able to recall the indication for each of their prescribed drugs. Variables that were negatively associated with correct reporting of all indications were: taking many prescribed drugs (≥ 10 vs. ≤ 5 drugs: odds ratio (OR) 0.05), age 80 years or over (vs. 60-69 years: OR 0.47) and male sex (vs. females: OR 0.53). Patients living with a partner were more knowledgeable than patients living alone (OR 2.11). We did not find an association with educational level.

CONCLUSION

Among older patients using five or more prescribed drugs, there was little understanding of the indications for their drugs, especially among patients taking the highest number of drugs, patients aged 80 years or over, and men. Patients living independently with a partner were more knowledgeable than others.

Exploring the process when developing a lifestyle intervention in primary care for type 2 diabetes: a longitudinal process evaluation

OBJECTIVES

A thorough understanding of the processes involved in lifestyle interventions is needed in order to close the gap between research and daily practice. This study explored the processes involved in the provision of a lifestyle intervention to patients with type 2 diabetes mellitus (T2DM) by health care professionals in primary care.

STUDY DESIGN

Mixed methods.

METHODS

Health care professionals were asked to intensify lifestyle interventions for patients with T2DM in a routine care setting. Data were collected by serial interviews with health care professionals and patients, recorded consultations, an activity questionnaire and biomedical information. Qualitative data were analysed using a framework analysis with a phenomenological approach.

RESULTS

The lifestyle intervention developed by the health care professionals included motivational interviewing, a nutrition and physical activity diary, and a multidisciplinary approach [physiotherapist, dietician, general practitioner and diabetes practice nurse (DPN)]. Participants and health care professionals were positive about the intervention, and patients were more active (P = 0.027), lost weight (P = 0.031) and had lower levels of glycated haemoglobin (P = 0.012). However, qualitative data showed that patients were passive during the consultation, and did not ask questions about ways to improve their lifestyle. DPNs did not use motivational interviewing optimally; provided patients with information that was difficult to understand; and were easily satisfied with the efforts of the patients.

CONCLUSIONS

Lifestyle intervention for patients with T2DM is difficult in routine primary care. DPNs should adapt to the knowledge level of the patients, and patients must be stimulated to take an active role in their treatment. Patients and health care professionals should become equal partners in determining mutually agreeable treatment plans and goals.

Development and validation of an ankle brachial index risk model for the prediction of cardiovascular events

BACKGROUND

The ankle brachial index (ABI) is related to risk of cardiovascular events independent of the Framingham risk score (FRS). The aim of this study was to develop and evaluate a risk model for cardiovascular events incorporating the ABI and FRS.

DESIGN

An analysis of participant data from 18 cohorts in which 24,375 men and 20,377 women free of coronary heart disease had ABI measured and were followed up for events.

METHODS

Subjects were divided into a development and internal validation dataset and an external validation dataset. Two models, comprising FRS and FRS + ABI, were fitted for the primary outcome of major coronary events.

RESULTS

In predicting events in the external validation dataset, C-index for the FRS was 0.672 (95% CI 0.599 to 0.737) in men and 0.578 (95% CI 0.492 to 0.661) in women. The FRS + ABI led to a small increase in C-index in men to 0.685 (95% CI 0.612 to 0.749) and large increase in women to 0.690 (95% CI 0.605 to 0.764) with net reclassification improvement (NRI) of 4.3% (95% CI 0.0 to 7.6%, p = 0.050) and 9.6% (95% CI 6.1 to 16.4%, p < 0.001), respectively. Restricting the FRS + ABI model to those with FRS intermediate 10-year risk of 10 to 19% resulted in higher NRI of 15.9% (95% CI 6.1 to 20.6%, p < 0.001) in men and 23.3% (95% CI 13.8 to 62.5%, p = 0.002) in women. However, incorporating ABI in an improved newly fitted risk factor model had a nonsignificant effect: NRI 2.0% (95% CI 2.3 to 4.2%, p = 0.567) in men and 1.1% (95% CI 1.9 to 4.0%, p = 0.483) in women.

CONCLUSIONS

An ABI risk model may improve prediction especially in individuals at intermediate risk and when performance of the base risk factor model is modest.

[How much do patients and health professionals (really) know? The surplus value of a home visit to the patient with polypharmacy by the practice nurse, to support medication reviews in primary care]

BACKGROUND

Polypharmacy in older people should be addressed by an annual review of the chronic medication. In the PIL-study this was done by an integrated approach by GP, practice nurse, pharmacist, specialist and patient. All patients were first visited at home by the practice nurse.

RESEARCH QUESTIONS

What 'over the counter' (OTC) medications do polypharmacy patients use? Do they know the indications of the prescribed medication? Does medication use according to the patient match with medication use according to the records of GP and pharmacist?

METHOD

Inclusion criteria were: age 60 years or older, daily use of five or more chronic medications, mental competence, and adequate command of the Dutch language. All patients were visited at home by the practice nurse, who made an inventory of the actual drug use.

RESULTS

Five hundred fifty patients used a total of 5576 drugs, including 527 (9.4%) OTC medication. Patients knew the indication of 64% of the prescribed medication. The number of prescribed drugs that a patient actually used did not match the numbers known to GP and pharmacist. In 60.4% of all medication prescriptions there was complete agreement between GP, pharmacist and patient. On a patient level agreement was 18.7%.

CONCLUSIONS

Home visits by the nurse practitioner to make an inventory of the medication as reported by the patient seem to have an added value.

Patient adherence to prescribed medication instructions for dyspepsia: the DIAMOND-study

BACKGROUND

Insight into patient adherence is needed to enable an effect evaluation of medication for dyspepsia.

OBJECTIVES

Adherence was explored by investigating two adherence outcome measures (completeness and intake fidelity) using data from the DIAMOND-study.

METHODS

The DIAMOND-study is a pragmatic RCT comparing a 'step-up' with a 'step-down' treatment strategy. In step 1 participants (n =653) were instructed to use five pills/day for maximally 30 days: an antacid 4dd plus a placebo 1dd ('step-up') or a proton pump inhibitor 1dd plus a placebo 4dd ('step-down'). If the complaints persisted, step 2 was started (H(2)-receptor antagonist 2dd), and subsequently step 3 (five pills/day, placebo and verum vice versa from step 1). Completeness was assessed by pill counts, intake fidelity by patient questionnaires measuring the degree to which patients adhered to specific instructions concerning timing, frequency, dose and way of intake.

RESULTS

In step 1, patients used on average 3.9 pills/day (78% of the prescribed doses), in step 2, 1.7 pills/day (85%) and in step 3, 3.6 pills/day (72%). For the four times daily pills, half of the patients used less than 80% of the prescribed pills per day. This was one third of the patients for the twice daily pills and one quarter for the once daily pills. There were no completeness differences between active or placebo medication and no differences between the study arms. As regards intake fidelity, 70% of the patients made one or more errors in the medication intake.

CONCLUSION

There is room for improvement in adherence rates for dyspepsia medication.

Which patient-related factors determine self-perceived patient adherence to prescribed dyspepsia medication?

Patient adherence to medical treatment for dyspepsia is disappointing, whereas adherence is crucial for a proper evaluation of treatment. This prospective study used elements of the Integrated Change Model and Weiner's Attribution Theory to describe patients' important cognitions and their interrelationships regarding self-perceived adherence to short-term medical treatment for dyspepsia. Patient questionnaires measured the predictors before treatment and self-perceived adherence after treatment. Approximately one-quarter of the patients indicated that they were non-adherent (n = 347). Univariate and multiple linear regression analyses revealed several significant predictors that explained 44% of the variance in self-perceived adherence. Patients with a low educational level, patients who claimed to regularly forget their medication in general, patients with a low self-efficacy or a low intention were less likely to be adherent. These results may indicate targets for interventions designed to improve adherence to medical treatment for dyspepsia. For instance, asking about expected difficulties in taking acid suppressants (e.g. forgetfulness or medication use at weekends) and making action plans to overcome these difficulties (e.g. using reminders) may result in improved adherence rates. Such an approach may reach a substantial number of patients since one in five patients in our study experienced some difficulties in taking medication.

Soluble or insoluble fibre in irritable bowel syndrome in primary care? Randomised placebo controlled trial

OBJECTIVE

To determine the effectiveness of increasing the dietary content of soluble fibre (psyllium) or insoluble fibre (bran) in patients with irritable bowel syndrome.

DESIGN

Randomised controlled trial.

SETTING

General practice.

PARTICIPANTS

275 patients aged 18-65 years with irritable bowel syndrome.

INTERVENTIONS

12 weeks of treatment with 10 g psyllium (n=85), 10 g bran (n=97), or 10 g placebo (rice flour) (n=93).

MAIN OUTCOME MEASURES

The primary end point was adequate symptom relief during at least two weeks in the previous month, analysed after one, two, and three months of treatment to assess both short term and sustained effectiveness. Secondary end points included irritable bowel syndrome symptom severity score, severity of abdominal pain, and irritable bowel syndrome quality of life scale.

RESULTS

The proportion of responders was significantly greater in the psyllium group than in the placebo group during the first month (57% v 35%; relative risk 1.60, 95% confidence interval 1.13 to 2.26) and the second month of treatment (59% v 41%; 1.44, 1.02 to 2.06). Bran was more effective than placebo during the third month of treatment only (57% v 32%; 1.70, 1.12 to 2.57), but this was not statistically significant in the worst case analysis (1.45, 0.97 to 2.16). After three months of treatment, symptom severity in the psyllium group was reduced by 90 points, compared with 49 points in the placebo group (P=0.03) and 58 points in the bran group (P=0.61 versus placebo). No differences were found with respect to quality of life. Fifty four (64%) of the patients allocated to psyllium, 54 (56%) in the bran group, and 56 (60%) in the placebo group completed the three month treatment period. Early dropout was most common in the bran group; the main reason was that the symptoms of irritable bowel syndrome worsened.

CONCLUSIONS

Psyllium offers benefits in patients with irritable bowel syndrome in primary care.

TRIAL REGISTRATION

Clinical trials NCT00189033.

Soluble or insoluble fibre in irritable bowel syndrome in primary care? Randomised placebo controlled trial

OBJECTIVE

To determine the effectiveness of increasing the dietary content of soluble fibre (psyllium) or insoluble fibre (bran) in patients with irritable bowel syndrome.

DESIGN

Randomised controlled trial.

SETTING

General practice.

PARTICIPANTS

275 patients aged 18-65 years with irritable bowel syndrome.

INTERVENTIONS

12 weeks of treatment with 10 g psyllium (n=85), 10 g bran (n=97), or 10 g placebo (rice flour) (n=93).

MAIN OUTCOME MEASURES

The primary end point was adequate symptom relief during at least two weeks in the previous month, analysed after one, two, and three months of treatment to assess both short term and sustained effectiveness. Secondary end points included irritable bowel syndrome symptom severity score, severity of abdominal pain, and irritable bowel syndrome quality of life scale.

RESULTS

The proportion of responders was significantly greater in the psyllium group than in the placebo group during the first month (57% v 35%; relative risk 1.60, 95% confidence interval 1.13 to 2.26) and the second month of treatment (59% v 41%; 1.44, 1.02 to 2.06). Bran was more effective than placebo during the third month of treatment only (57% v 32%; 1.70, 1.12 to 2.57), but this was not statistically significant in the worst case analysis (1.45, 0.97 to 2.16). After three months of treatment, symptom severity in the psyllium group was reduced by 90 points, compared with 49 points in the placebo group (P=0.03) and 58 points in the bran group (P=0.61 versus placebo). No differences were found with respect to quality of life. Fifty four (64%) of the patients allocated to psyllium, 54 (56%) in the bran group, and 56 (60%) in the placebo group completed the three month treatment period. Early dropout was most common in the bran group; the main reason was that the symptoms of irritable bowel syndrome worsened.

CONCLUSIONS

Psyllium offers benefits in patients with irritable bowel syndrome in primary care.

TRIAL REGISTRATION

Clinical trials NCT00189033.

Influence of gastric mucosal status on success of stepwise acid suppressive therapy for dyspepsia

BACKGROUND

The most effective initial treatment strategy of dyspepsia is still under debate. Individual biological characteristics, such as condition of gastric mucosa, might contribute to selection of the most appropriate acid suppression treatment strategy.

AIM

To assess whether pre-treatment testing of gastric mucosal status is relevant for treatment success in an RCT comparing step-up and step-down therapies in newly diagnosed dyspepsia patients.

METHODS

Baseline serum samples were collected to assess gastric mucosal status using serum levels of pepsinogens-I&II, gastrin-17, and Helicobacter pylori IgA/IgG-antibodies. The 6-month treatment success was compared between step-up and step-down for patients with serum diagnoses: normal; gastritis; corpus atrophy or antrum atrophy.

RESULTS

In all, 519 patients (M/F: 249/270, age: 47 (18-85) years, 29%H. pylori+) were randomized to step-up (n = 293) or step-down (n = 226). Normal mucosa, gastritis and corpus atrophy were diagnosed serologically in 70%, 28% and 2% of the patients, evenly distributed between the strategies (P = 0.65). Treatment success was achieved in respectively, 69%, 70% and 70% for the serum diagnosis groups, and did not differ between the strategies.

CONCLUSIONS

Dyspepsia treatment success could not be predicted by gastric mucosal status. Therefore, serum diagnosis of gastric mucosal status is no useful tool for patient allocation to acid suppressive treatment strategies.

Psychopathology is associated with dyspeptic symptom severity in primary care patients with a new episode of dyspepsia

BACKGROUND

Personality and psychiatric disorders are reported to be more common in dyspeptic patients with severe complaints, but it remains unclear whether this association exists for patients with mild and moderate dyspepsia.

AIM

To study the association between dyspeptic symptom severity and psychopathology, major life events and coping ability in patients with a new episode of dyspepsia. METHODS; Dyspeptic symptom severity was measured using the validated eight symptom Veldhuyzen van Zanten questionnaire. Psychopathology was measured using the Symptom Check List-90 (SCL 90). Major life events were measured with a modified version of the Social Readjustment Rating Scale (SRRS). Coping styles were measured by a short version of the Utrecht Coping Questionnaire, distinguishing six coping styles. Linear regression was used to assess the relationship between dyspepsia symptom severity and psychological factors.

RESULTS

In all, 664 patients with a new episode of uninvestigated dyspepsia, aged >18 years were included. Dyspeptic symptom severity was positively correlated with the presence of depression (P < 0.01), somatization symptoms (P < 0.01), use of an active coping style (P < 0.01) and negatively correlated with age (P < 0.01).

CONCLUSIONS

Primary care patients consulting with dyspepsia have higher levels of depression and somatization especially at younger age. An active coping style is associated with dyspepsia symptom severity.

[The Dr A.H. Heineken Prize for Medicine 2008 awarded to Sir Richard Peto]

The increasingly strong interaction between biomedical and epidemiological research is one of the most important steps forward in medicine and public health since World War II. Crucial breakthroughs were the development of powerful observational epidemiological studies, the introduction of convincingly designed clinical trials, and meta-analyses to objectively summarise the results of multiple studies. For this progress, the work of Sir Richard Peto (born in 1943), epidemiologist and statistician at the University of Oxford, Great Britain, has been essential. Peto combined innovative methodological contributions with large-scaled empirical studies, often based on worldwide collaborations, with a special focus on smoking and health, treatment of breast cancer, and cholesterol-lowering interventions. His work both produced and evoked an impressive evidence base to improve clinical and public health practice. In accordance with the advice of a selection committee of the Royal Netherlands Academy of Arts and Sciences, he was awarded the Dr A.H. Heineken Prize for Medicine on 2 October 2008.

Randomized patients in IBS research had different disease characteristics compared to eligible and recruited patients

OBJECTIVE

The recruitment process may generate a selected patient sample, which may threaten the generalizability of trial results. This risk is particularly high in case disease and patient characteristics demonstrate a wide variation, such as in irritable bowel syndrome (IBS). We compared IBS patients who were selected, approached, and randomized to participate in a clinical trial assessing the efficacy of dietary fiber therapy in IBS.

STUDY DESIGN AND SETTING

Retrospective survey in primary care patients diagnosed with IBS by their general practitioner in the past 2 years selected and invited for participation in a trial. Characteristics were compared between randomized patients (n=193) nonrandomized eligible patients (n=371), and patients not eligible for participating in the trial (n=724).

RESULTS

Of the 2,100 IBS patients, 1,288 (61%) returned the questionnaire. Randomized patients had a higher intensity of IBS abdominal pain as compared to the other groups, a higher consultation rate and a longer IBS disease history. Noneligible patients had less active IBS symptoms.

CONCLUSIONS

Patients randomized do differ from those nonrandomized in IBS disease characteristics. These observations may have implications for the applicability of our research outcome.

Ankle brachial index combined with Framingham Risk Score to predict cardiovascular events and mortality: a meta-analysis

CONTEXT

Prediction models to identify healthy individuals at high risk of cardiovascular disease have limited accuracy. A low ankle brachial index (ABI) is an indicator of atherosclerosis and has the potential to improve prediction.

OBJECTIVE

To determine if the ABI provides information on the risk of cardiovascular events and mortality independently of the Framingham risk score (FRS) and can improve risk prediction.

DATA SOURCES

Relevant studies were identified. A search of MEDLINE (1950 to February 2008) and EMBASE (1980 to February 2008) was conducted using common text words for the term ankle brachial index combined with text words and Medical Subject Headings to capture prospective cohort designs. Review of reference lists and conference proceedings, and correspondence with experts was conducted to identify additional published and unpublished studies.

STUDY SELECTION

Studies were included if participants were derived from a general population, ABI was measured at baseline, and individuals were followed up to detect total and cardiovascular mortality.

DATA EXTRACTION

Prespecified data on individuals in each selected study were extracted into a combined data set and an individual participant data meta-analysis was conducted on individuals who had no previous history of coronary heart disease.

RESULTS

Sixteen population cohort studies fulfilling the inclusion criteria were included. During 480,325 person-years of follow-up of 24,955 men and 23,339 women, the risk of death by ABI had a reverse J-shaped distribution with a normal (low risk) ABI of 1.11 to 1.40. The 10-year cardiovascular mortality in men with a low ABI (< or = 0.90) was 18.7% (95% confidence interval [CI], 13.3%-24.1%) and with normal ABI (1.11-1.40) was 4.4% (95% CI, 3.2%-5.7%) (hazard ratio [HR], 4.2; 95% CI, 3.3-5.4). Corresponding mortalities in women were 12.6% (95% CI, 6.2%-19.0%) and 4.1% (95% CI, 2.2%-6.1%) (HR, 3.5; 95% CI, 2.4-5.1). The HRs remained elevated after adjusting for FRS (2.9 [95% CI, 2.3-3.7] for men vs 3.0 [95% CI, 2.0-4.4] for women). A low ABI (< or = 0.90) was associated with approximately twice the 10-year total mortality, cardiovascular mortality, and major coronary event rate compared with the overall rate in each FRS category. Inclusion of the ABI in cardiovascular risk stratification using the FRS would result in reclassification of the risk category and modification of treatment recommendations in approximately 19% of men and 36% of women.

CONCLUSION

Measurement of the ABI may improve the accuracy of cardiovascular risk prediction beyond the FRS.

[Influenza vaccination in the elderly: effectiveness not in doubt]

In a recent review the effectiveness of influenza vaccination in the elderly was brought into question. Selection bias, which would occurr if healthy people were more likely to be vaccinated than their infirm peers, and the use of non-specific outcomes, such as death from all causes, were considered to have contributed to the effectiveness of the vaccine as to morbidity and mortality being overestimated. However, a recent study has shown that even when potential bias and residual confounding were addressed, influenza vaccination was associated with a significant reduction in the risk of influenza-related morbidity and mortality among community-dwelling elderly persons. Direct estimates of influenza-related morbidity were hampered by delayed and insufficiently sensitive diagnostics. Excess studies, however, comparing morbidity and mortality during periods with and without influenza predominance, present reliable indirect estimates in favour of vaccination. While the vaccination rate of high-risk subjects in The Netherlands is traditionally high, the age limit for influenza vaccination was lowered from 65 to 60 in 2008, taking into account influenza-related morbidity and mortality in healthy people aged 60 to 65 years and the undisputed effectiveness of vaccination against influenza.

Similarities, overlap and differences between burnout and prolonged fatigue in the working population

BACKGROUND

Burnout and prolonged fatigue are related but distinct concepts that have seldom been empirically compared.

AIM

To examine similarities, overlap and differences between burnout and prolonged fatigue.

DESIGN

Observational study.

METHODS

We analysed baseline data from the Maastricht Cohort Study on Fatigue at Work (n = 12 140). The discriminative abilities of the Checklist Individual Strength (CIS) and the Maslach Burnout Inventory-General Survey (MBI-GS) were evaluated using principal component analysis. Overlap, similarities and differences regarding health, work and demographic factors between subgroups were assessed.

RESULTS

The discriminative abilities of the CIS and MBI-GS appeared to be moderate. Prolonged fatigue and burnout cases overlapped considerably. The subgroup consisting of cases with concurrent fatigue and burnout tended to have poorer outcomes in terms of health and work factors than the subgroups with either prolonged fatigue or burnout. Similar patterns were found for subjective fatigue and exhaustion.

DISCUSSION

There appear to be some relevant differences between burnout and prolonged fatigue, with respect to work and health factors. Burnout and prolonged fatigue can occur both separately and simultaneously. Having both conditions simultaneously seems to be associated with worse outcomes than having either alone.

No clinical evidence base to support the hygiene hypothesis

The hygiene hypothesis is a popular explanation for recent increases in allergy in the western world. This hypothesis suggests that development of allergy (or asthma) could be prevented by exposure to immune stimulants such as viruses, bacteria and endotoxins, in particular in the prenatal period or early childhood. How evidence-based are the observations which support the hygiene hypothesis? All clinical epidemiological indications in favour of the hypothesis are based on observational (cross-sectional and cohort) studies and not on observations in randomised controlled intervention studies. In cross-sectional studies no causal relationships can be assessed with sufficient validity. Also in cohort studies there are validity problems, as the exposure is not determined by chance (by means of randomisation) and could be influenced by behaviour. And behaviour might well be a confounder, since it can be associated with both exposure and outcome. A problem is that, without being appropriately tested in well designed prospective research, the hygiene hypothesis has currently already become so popular in the news media that an increased occurrence of asthma might even be induced as a result of an increased exposure. Although the currently available evidence to support the hygiene hypothesis is poor, it appears that the hypothesis has to some become a matter of faith or ideology. Scientists should take care that messages imparted to the general public do not go beyond or conflict with existing evidence.

Measuring the severity of upper gastrointestinal complaints: does GP assessment correspond with patients' self-assessment?

BACKGROUND

Questionnaires are frequently used to measure the severity of gastrointestinal (GI) complaints. These questionnaires can either be filled out by the physicians or by the patients, but it is not clear whether these scores correspond. This study aimed to investigate the interrater agreement between physician-reported severity and patient-reported severity concerning the patients' upper GI complaints.

METHODS

In a prospective observational study, the severity of eight GI complaints was registered by both patients and GPs independently on a seven-point scale (n = 316) before and after treatment with esomeprazole. Weighted kappa values for the agreement on the severity and simple kappa values for the agreement on the absence or presence of symptoms were calculated.

RESULTS

The weighted kappa values ranged from 0.14 to 0.68 indicating poor to moderate agreement. The agreement on the presence or absence of symptoms was similar. Several systematic differences in scoring were found: the GPs tended to underestimate the severity of belching, nausea, early satiety, vomiting and upper and lower abdominal pain. Furthermore, the treatment effect for belching and lower abdominal pain was more often overestimated, while the treatment effect for nausea was more often underestimated by the GP.

CONCLUSION

The agreement between GP and patient is low. The differences in scoring should be kept in mind when comparing physician-reported outcomes with patient-reported outcomes.

Alcohol intake and cardiovascular disease and mortality: the role of pre-existing disease

OBJECTIVES

Pre-existing conditions have been postulated as possible causes of the J-shaped relationship between alcohol intake and cardiovascular disease. Two research questions have been addressed in this paper. First, whether never drinkers and former drinkers differ from moderate drinkers in terms of health, and if so, which health problems contribute to this difference. Second, whether the U-shaped relationship between current alcohol intake and cardiovascular disease or all-cause mortality could in part be explained by difference in pre-existing disease burden.

DESIGN, SETTING AND PARTICIPANTS

A prospective case-cohort, the Lifestyle and Health Study, consisting of 16,210 men and women aged between 45 and 70 years. Alcohol intake and risk factors were assessed at baseline with a self-administered questionnaire. Medical information was obtained from general practitioners. Cardiovascular events and mortality were followed for a period of 5 years (1996-2001).

MAIN RESULTS

Never drinkers and former drinkers were less healthy than moderate drinkers. They rated their health more often as poor, and often had more diseases, such as cardiovascular disease, diabetes, and also alcohol-related diseases. The difference in disease burden did not change the observed relationship between alcohol intake and cardiovascular events, and only partially changed the U-shaped relationship between alcohol intake and all-cause mortality.

CONCLUSIONS

The found difference in health between never drinkers and former drinkers compared with moderate drinkers appeared to be only a partial explanation of the observed relationships between alcohol intake and cardiovascular disease, and between alcohol intake and all-cause mortality.

Uncovering and responding to needs for sexual and reproductive health care among poor urban female adolescents in Nicaragua

BACKGROUND

To meet the needs of female adolescents from low-income urban areas for sexual and reproductive health (SRH) care, vouchers providing free-of-charge access to SRH care at 19 primary care clinics were distributed in Managua, Nicaragua. These vouchers substantially increased the use of services, demonstrating that many adolescents are willing to use such services, if readily accessible. The voucher redemption made it possible to identify the nature of existing, but largely unmet, needs for SRH care.

METHOD

The medical files from 3301 consultations with female adolescents were analysed using descriptive statistical methods and multiple logistic regression.

RESULTS

Female adolescents presented SRH problems that merited medical attention. The mean number of problems presented was 1.5 per consultation: 34% of the vouchers were used for contraceptives, 31% for complaints related to sexually transmitted infection (STI) or reproductive tract infection (RTI), 28% for advice/counselling, 28% for antenatal check-up and 18% for pregnancy testing. A new category of health care users emerged: sexually active girls who were neither pregnant nor mothers and who sought contraceptives or STI/RTI treatment. Contraceptive use doubled among the sexually active non-pregnant voucher redeemers. Consultation with a female doctor younger than 36 years was associated with a higher chance of having contraceptives prescribed.

CONCLUSION

Accessible and appropriate SRH care has the potential to make an important contribution to the increased contraceptive use, decreased risk of unwanted teenage pregnancies and decreased prevalence of STIs/RTIs among underserved adolescents. Once adolescents access the services, providers have a crucial role in ensuring current and continuing needs are met.

Can a comprehensive voucher programme prompt changes in doctors' knowledge, attitudes and practices related to sexual and reproductive health care for adolescents? A case study from Latin America

OBJECTIVES

To evaluate whether participation in a competitive voucher programme designed to improve access to and quality of sexual and reproductive health care (SRH-care), prompted changes in doctors' knowledge, attitudes and practices.

METHODS

The voucher programme provided free access to SRH-care for adolescents. Doctors received training and guidelines on how to deal with adolescents, a treatment protocol, and financial incentives for each adolescent attended. To evaluate the impact of the intervention on doctors, nearly all participating doctors (n = 37) were interviewed before the intervention and 23 were interviewed after the intervention. Answers were grouped in subthemes and scores compared using nonparametric methods.

RESULTS

The initial interviews disclosed deficiencies in doctors' knowledge, attitudes and practices relating to adolescent SRH-issues. Gender and age of the doctor were not associated with the initial scores. Comparing scores from before and after the intervention revealed significant increases in doctors' knowledge of contraceptives (P = 0.003) and sexually transmittable infections (P < 0.001); barriers to contraceptive use significantly diminished (P < 0.001 and P = 0.003); and some attitudinal changes were observed (0 = 0.046 and P = 0.11). Doctors became more aware of the need to improve their communication skills and were positive about the programme.

CONCLUSIONS

This study confirmed provider related barriers that adolescents in Nicaragua may face and reinforces the importance of focusing on the quality of care and strengthening doctors' training. Participation in the voucher programme resulted in increased knowledge, improved practices and, to a lesser extent, in changed attitudes. A competitive voucher programme with technical support for the participating doctors can be a promising strategy to prompt change.

Chronic fatigue syndrome-like caseness as a predictor of work status in fatigued employees on sick leave: four year follow up study

OBJECTIVE

To assess whether CFS-like caseness (meeting the criteria for chronic fatigue syndrome (CFS)) predicts work status in the long term.

METHODS

Prospective study in a sample of fatigued employees absent from work. Data were collected at baseline and four years later, and included CFS-like caseness and work status (inactive work status and full work incapacity).

RESULTS

CFS-like cases at baseline were three times more likely to be unable to work at follow up than fatigued employees who did not meet CFS criteria at baseline (ORs 3-3.3). These associations grew even stronger when demographic and clinical confounders were controlled for (ORs 3.4-4.4).

CONCLUSION

A CFS-like status (compared to non-CFS fatigue) proved to be a strong predictor of an inactive work status and full work incapacity in the long term. Since little is known about effective interventions that prevent absenteeism and work incapacity or facilitate return to work in subjects with chronic fatigue, there is a great need for powerful early interventions that restore or preserve the ability to work, especially for workers who meet criteria for CFS.

Lower prevalence of heart disease but higher mortality risk during follow-up was found among nonrespondents to a cohort study

OBJECTIVE

The primary aim was to assess the association between response behavior and health status at baseline, and survival in a 5-year follow-up period. A secondary aim was to assess whether reasons for nonresponse were associated with health status at baseline.

STUDY DESIGN AND SETTING

Data came from a prospective study cohort consisting of 31,349 men and women aged 45-70 years. Objective retrospective and prospective health information derived from general practitioner registries was available for both respondents and nonrespondents.

RESULTS

Results show that among respondents coronary heart disease was more prevalent. Compared with respondents, noncontacts had a higher mortality risk during follow-up. Refusals had hypercholesterolemia more often than did noncontacts, and coronary heart disease or diabetes mellitus less often.

CONCLUSION

The paradoxical results that respondents are less healthy at baseline but prospectively have a lower mortality risk may point to a selection effect indicating that the 'worried ill' are more inclined to participate. This effect could imply that observed relationships between risk factors or behaviors and outcomes in cohort studies may be attenuated.

The Effects of 6 Months of Increased Water Intake on Blood Sodium, Glomerular Filtration Rate, Blood Pressure, and Quality of Life in Elderly (Aged 55–75) Men

OBJECTIVES

To study whether there are any negative or positive effects of 6 months of increased fluid intake in reasonably healthy elderly men.

DESIGN

Randomized trial.

SETTING

Community-based.

PARTICIPANTS

One hundred forty-one healthy participants aged 55 to 75.

INTERVENTION

One group was given the advice to increase their daily fluid intake by 1.5 L of water; the other group was given placebo medication (8 mL inactive syrup per day).

MEASUREMENTS

At 6 months blood sodium, glomerular filtration rate (GFR), blood pressure, and quality of life (QOL) were measured. The changes in water turnover were measured using deuterium.

RESULTS

Most subjects did not manage to increase their fluid intake by 1.5 L. The average increase in the intervention group was approximately 1 L. Twenty-four-hour water turnover in the water group was 359 mL (95% confidence interval=171-548) higher than that of the control group at 6-month follow-up. Blood pressure, sodium level, GFR, and QOL did not change significantly in either group during the intervention period. In addition, the cases reporting a worsening on the effect measures were equally distributed over the two study groups.

CONCLUSION

The advice to increase fluid intake by 1.5 L had no negative effects in reasonably healthy men aged 55 to 75.

Perceived quality of reproductive care for girls in a competitive voucher programme. A quasi-experimental intervention study, Managua, Nicaragua

OBJECTIVE

To determine whether female adolescents from low-income areas in Managua were satisfied with the sexual and reproductive health (SRH) care provided through a competitive voucher programme and to analyse the determinants of their satisfaction.

DESIGN

A community-based quasi-experimental intervention study from 2000 to 2002.

SETTING

Low-income areas of Managua.

INTERVENTION

Distribution of 28,711 vouchers giving adolescents free-access to SRH care in 19 clinics; training and support for health care providers.

STUDY PARTICIPANTS

A random sample of 3009 girls from 12 to 20 years completed self-administered questionnaires: 700 respondents had used this care in the last 15 months, 221 with voucher (users-with-voucher) and 479 without voucher (users-without-voucher).

MAIN OUTCOME MEASURES

User satisfaction; Satisfaction with clinic reception; Clarity of doctors' explanations.

RESULTS

User satisfaction was significantly higher in users-with-voucher compared with users-without-voucher [Adjusted odds-ratio (AOR) = 2.2; 95% confidence interval (95% CI) = 1.2-4.0]. Voucher use was associated with more frequent satisfaction with clinic reception, especially among sexually active girls not yet pregnant or mother (AOR = 6.9; 95% CI = 1.5-31.8). The clarity of doctors' explanations was not perceived differently (AOR = 1.4; 95% CI = 0.9-2.2). User satisfaction was highly correlated to satisfaction with clinic reception and clarity of doctors' explanations (P < 0.001). Longer consultation times, shorter waiting times, older age, and having a female doctor positively influenced user satisfaction.

CONCLUSION

Voucher use by teenage girls was associated with a better perceived SRH care. This is an important result, given the crucial role user satisfaction plays in adoption and continued use of health care and contraceptives. Though more research is needed, confidential and guaranteed access appear key factors to voucher success.

Increasing the daily water intake for the prophylactic treatment of headache: a pilot trial

Dehydration is commonly believed to result in headache, but the effectiveness of increasing the water intake in patients who frequently suffer from headaches has not been studied thus far. In a pilot study, we examined the possible effects and feasibility of increased water intake in headache patients. Eighteen headache patients (all had migraine, two also had tension-type headache) were randomly allocated to placebo medication, or the advice to additionally drink 1.5 l of water per day, for a period of 12 weeks. Effect measurements consisted of a 2 weeks headache diary and the Migraine Specific Quality of Life (MSQOL) questionnaire. The advice to increase the daily fluid intake by 1.5 l increased the fluid intake in the intervention group by approximately 1 l. This reduced the total hours of headache in 2 weeks by 21 h (95% CI: -48 to 5). Mean headache intensity decreased by 13 mm (95% CI: -32 to 5) on a visual analogue scale (VAS). The effects on MSQOL, number of headache episodes, and medication seemed to be small. The data of the present study suggest a reduction in the total number of hours and intensity of headache episodes after increased water intake. Our results seem to justify larger scaled research on the effectiveness of increased water intake in headache patients.

The PREVASC study: the clinical effect of a multifaceted educational intervention to prevent childhood asthma

As asthma is the most common chronic disease in childhood, much attention is directed towards primary prevention. Here, the clinical effectiveness of a multifaceted educational prevention was studied. A total of 476 high-risk children were recruited during the prenatal period by general practitioners and randomised to either: 1) a control group, receiving usual care; or 2) an intervention group in which families received instruction from nurses on how to reduce exposure of newborns to mite, pet and food allergens, and passive smoking. A total of 443 infants were followed-up for 2 yrs. At 2 yrs of age, the intervention group (n = 222) had less asthma-like symptoms, including wheezing, shortness of breath and night-time cough, than the control group (n = 221). No significant differences in total and specific immunoglobulin E were found between the groups. During the first 2 yrs of life, the incidence of asthma-like symptoms was similar in both groups; however, subanalysis revealed a significant reduction in the female, but not in the male, intervention group. In conclusion, the intervention used in this study was not effective in reducing asthma-like symptoms in high-risk children during the first 2 yrs of life, although it was modestly effective at 2 yrs. Follow-up is necessary to confirm whether the intervention can actually prevent the development of asthma.

The validity and ethics of giving placebo in a randomized nonpharmacologic trial was evaluated

OBJECTIVE

When studying the effects of a non-pharmacologic intervention, the choice of a control group is often difficult. In a study on the effectiveness of increased water intake on voiding dysfunction in elderly men we used an unusual design. This article addresses the internal validty and ethics of this design.

STUDY DESIGN AND SETTING

The randomized trial we evaluated had a 6-month follow-up period and was carried out among 141 elderly men with moderate lower urinary tract symptoms. The experimental group was given the instruction to drink more water, the control group received placebo medication. The participants were not informed that there was a 50% chance of receiving placebo. We measured whether the prior expectations and preferences were comparable for the two study groups, whether blinding was preserved throughout the study period, and whether the participants considered this design ethical.

RESULTS

Prior to randomization, patients had higher expectations for the experimental intervention, but there was not statistically significant difference in their preference. During the study period, two out of 71 patients in the control group unmasked the placebo. In general, both groups fully agreed with the informed consent procedure.

CONCLUSION

This design can be considered when the effects of a non-pharmacologic interventions are studied.

Clinical items not helpful in differentiating viral from bacterial lower respiratory tract infections in general practice

OBJECTIVE

Incorrect and unnecessary antibiotic prescribing enhancing bacterial resistance rates might be reduced if viral and bacterial lower respiratory tract infections (LRTI) could be differentiated clinically. Whether this is possible is often doubted but has rarely been studied in general practice.

STUDY DESIGN AND SETTING

This was an observational cohort study in 15 general practice surgeries in the Netherlands.

RESULTS

Etiologic diagnoses were obtained in 112 of 234 patients with complete data (48%). Viral pathogens were found as often as bacterial pathogens. Haemophilus (para-) influenzae was most frequently found. None of the symptoms and signs correlated statistically significantly with viral or bacterial LRTI. Erythrocyte sedimentation rate >50 (odds ratio [OR] 2.3-3.3) and C-reactive protein (CRP) >20 (OR 2.1-4.6) were independent predictors for viral LRTI and bacterial LRTI when compared with microbiologically unexplained LRTI.

CONCLUSION

Extensive history-taking and physical examination did not provide items that predict viral or bacterial LRTI in adult patients in daily general practice. We could not confirm CRP to differentiate between viral and bacterial LRTI.

Influence of the presence of doctors-in-training on the blood pressure of patients: a randomised controlled trial in 22 teaching practices

Until now, no information is available about the effect of the presence of a doctor-in-training on a patient's blood pressure. We tested the hypothesis that the presence of a last year medical student might increase the blood pressure of the patient, in addition to the possible pressor response to the doctor-trainer. Normotensive and hypertensive patients with a minimum age of 25 years, visiting for any reason, were recruited at 22 teaching general practices. Patients were randomised into a 'trainee' group (n=133) and a 'no trainee' (n=129) group. The blood pressure was measured at two subsequent contacts. In the 'trainee' group, a student was present at the first visit only. In the 'no trainee' group, both visits were without student. Both groups had similar anthropometric characteristics at entry. At the first visit, systolic pressure was higher in the 'trainee' group than in the control group (139.5 vs 133.1 mmHg, P=0.004), with a similar trend for diastolic pressure (80.2 vs 77.8 mmHg, P=0.07). From the first contact to the follow-up visit, blood pressure decreased in the trainee group by 4.8 mmHg systolic (P<0.001) and 1.7 mmHg diastolic (P=0.03), whereas the corresponding changes in the control group were -0.1 mmHg (P=0.90) and +1.5 mmHg (P=0.03). Thus, the between group differences in these trends averaging 4.7 mmHg (CI 1.5-7.9, P=0.005) systolic and 3.2 mmHg (CI 1.1-5.3, P=0.003) diastolic were statistically significant. We conclude that in teaching-practices, the presence of a doctor-in-training has a significant pressor effect when an experienced general practitioner measures a patient's blood pressure. If confirmed, our findings imply that doctors should be cautious to initiate or adjust antihypertensive treatment when blood pressure readings are obtained in the presence of a student.

Prenatal exposure to mite and pet allergens and total serum IgE at birth in high-risk children

To examine the relationship between prenatal exposure to mite, cat and dog allergens and total serum IgE at birth in newborns at high risk of asthma. In the homes of 221 newborns with at least one first-degree relative with asthma, concentrations (ng/g dust) of allergens of house dust mite (mite), cat and dog were measured at the fourth to sixth month of pregnancy in dust samples from the maternal mattress and living room. At day 3-5 after birth, total IgE was measured in capillary heel blood. A total number of 174 blood samples were available (11 mothers refused newborn's blood sampling, and in 36 cases the blood sample was too small for analysis). In 24% of the newborns, total IgE was elevated (cut-off value 0.5 IU/ml). A significant dose response relationship was found between increasing mite allergen levels [divided in quartiles ng/g dust (qrt)] and the percentage of elevated IgE: first qrt (0-85 ng/g) 13%; second qrt (86-381) 19%; third qrt (382-2371) 26%; fourth qrt (> or =2372) 42%, respectively, p=0.01. This relationship remained significant after adjusting for passive smoking, maternal and paternal mite allergy, socio-demographic factors, birth characteristics and (breast) feeding practice in the first week of life. In high-risk newborns, prenatal exposure to mite allergens, but not to cat and dog allergens from dust of the living room and of the maternal mattress was associated with total serum IgE at birth.

Compliance of asthmatic families with a primary prevention programme of asthma and effectiveness of measures to reduce inhalant allergens--a randomized trial

BACKGROUND

Compliance to and the effect of pre- and post-natal exposure reduction measures to prevent asthma in high-risk children from asthmatic families were studied.

METHOD

Families were randomized to a special care group (n=222) and a control group (n=221). Educational advice on measures to reduce their newborn's exposure to allergens and smoke was provided to the special care group during three visits (two pre-natal and one post-natal). The control group (n=221) received usual care.

RESULT

After the intervention, the special care group differed significantly (P<0.01) from the usual care group in: use of anti-mite encasings (parental: 88% vs. 14%; baby: 98% vs. 10%); keeping pets outside (51% vs. 19%); combined breast- and hypoallergenic formula feeding (55% vs. 22%); first solids postponement until after the sixth month (71% vs. 28%); maternal post-natal smoking (52% vs. 28%). Little or no compliance was found for other sanitary measures (cleaning habits, providing a smooth floor covering, ventilation/airing, pet removal), exclusive breastfeeding, pre-natal smoking and partner smoking. In spite of pre-existent low allergen levels in both groups, there was a significant reduction of mite, cat, and dog allergens on the mattresses and mite and cat allergens in the living room in the special care group and were significantly lower compared with the usual care group after 1 year.

CONCLUSION

High compliance was found for the use of anti-mite encasings; substantial compliance for using hypoallergenic formula, solid food postponement, keeping pets outside and reported post-natal maternal smoking. There was no compliance for sanitary measures and the reduction of maternal pre-natal passive smoking. Mite and pet allergens on mattresses were strongly reduced by anti-mite encasings.

Psychological characteristics of patients with newly developed psychogenic seizures

OBJECTIVES

To assess psychopathological symptoms and history of childhood trauma in patients with newly developed psychogenic seizures.

METHODS

Using validated scales, 178 patients from the general population diagnosed with newly developed seizures were assessed, at a point in time when the nature of their seizures was yet unknown to either doctors or patients. After standardised neurological examination, 138 patients were diagnosed with non-psychogenic seizures (NPS), while 40 patients were found to have psychogenic seizures (PS). To evaluate possible differences between the genders and the diagnostic groups, univariate analyses of variance were done.

RESULTS

PS patients reported significantly more comorbid psychopathological complaints, dissociative experiences, anxiety, and self-reported childhood trauma than NPS patients. In addition, PS patients had lower quality of life ratings than NPS patients. These effects were not modulated by gender.

CONCLUSIONS

The results of the present study indicate that patients with newly developed PS constitute a group with complex psychopathological features that warrant early detection and treatment.

Measurement of lifetime alcohol intake: utility of a self-administered questionnaire

Prior epidemiologic research revealing cardioprotective effects of alcohol intake has systematically neglected lifetime exposure to alcohol, which may cause serious bias in conclusions regarding drinking and heart disease risk. Departing from use of an earlier interview schedule, the authors of the present 1996-2001 cohort study developed a self-administered Lifetime Drinking History questionnaire (LDH-q). A total of 16,211 Dutch men and women older than age 45 years participated by completing the baseline questionnaire. A random sample of 3,255 men and women was used to determine the reliability and validity of the LDH-q. Test-retest reliability was assessed by means of the intraclass correlation coefficient and kappa scores. Correlations between lifetime and current intake scores were used to assess discriminant and convergent validity. Both reliability and validity appeared to be reasonably high compared with results obtained by using interview formats to measure lifetime alcohol intake. Reliability of the LDH-q was higher for men than for women, probably because of the more frequent and regular drinking of men. Indices of validity were similar for men (0.75) and women (0.70). Results show that the LDH-q can be a useful instrument in large-scale cohort studies.

Pathophysiological aspects of bladder dysfunction: a new hypothesis for the prevention of ‘prostatic’ symptoms

This article reviews the literature on the pathophysiology of male lower urinary tract symptoms (LUTS) with the intention of developing a new preventive intervention for this bothersome disease. Traditionally, male voiding dysfunction has been thought to arise from bladder outlet obstruction (BOO) caused by prostatic enlargement. Many years of research, however, have shown that a clear relationship between the size of the prostate and the occurrence or severity of symptoms is doubtful. Because of its crucial role in urination, it is increasingly being accepted that the clinical manifestation of voiding dysfunction relies on the functional behaviour of the bladder. Several animal studies have shown that bladder performance can be improved by increasing urine output. Contrary to alterations observed in pathologic situations, an increased urine output provides a physiologic stimulus for animal bladder function improvement. We hypothesise that a trained bladder should be less susceptible to the harmful effects of ageing and obstruction. Future symptoms may thus be prevented. In humans an increased urine output can be achieved by drinking additional water, which could be an adequate preventive intervention.

Asymptomatic peripheral arterial occlusive disease predicted cardiovascular morbidity and mortality in a 7-year follow-up study

OBJECTIVE

Asymptomatic peripheral arterial occlusive disease (PAOD) is a common atherosclerotic disorder among the elderly population. Scarce data are available on the risk of nonfatal and fatal cardiovascular diseases in these subjects. We investigated cardiovascular morbidity and mortality of asymptomatic PAOD subjects.

STUDY DESIGN AND SETTING

A sample of 3649 subjects (40-78 years of age) was selected in collaboration with 18 general practice centers and followed up after the initial screening (mean follow-up time 7.2 years). Asymptomatic PAOD was determined by means of the ankle-brachial pressure index (ABPI). Main outcome measures were nonfatal cardiovascular events and mortality.

RESULTS

Cox proportional hazard models showed that asymptomatic PAOD was significantly associated with cardiovascular morbidity (hazard ratio [HR] 1.6, 95% confidence interval [CI] 1.3-2.1), total mortality (HR 1.4, 95% CI 1.1-1.8), and cardiovascular mortality (HR 1.5, 95% CI 1.1-2.1).

CONCLUSION

Asymptomatic PAOD is a significant predictor of cardiovascular morbidity and mortality. In high-risk subjects, measurement of the ABPI provides valuable information on future cardiovascular events.

Systematic review: the role of different types of fibre in the treatment of irritable bowel syndrome

BACKGROUND

Both high-fibre dietary advice and the prescription of fibre as a bulking agent are very common in primary and secondary care management of irritable bowel syndrome. Irritable bowel syndrome patients with constipation may have delayed intestinal transit. Therefore, fibres that accelerate intestinal transit may be beneficial in these patients. The uncertain benefits reported in several clinical studies, however, have led us to reappraise the value of fibre in irritable bowel syndrome management.

AIM

To quantify the effect of different types of fibre on global and symptom relief from irritable bowel syndrome.

METHODS

Using a structured literature search in MEDLINE (1966-2002), we selected randomized controlled trials involving irritable bowel syndrome patients treated with fibre. Analyses were performed for the total group and for trials using soluble and insoluble fibre separately.

RESULTS

Seventeen studies were included in the analysis. None investigated primary care irritable bowel syndrome patients. Fibre, in general, was effective in the relief of global irritable bowel syndrome symptoms [relative risk, 1.33; 95% confidence interval (CI), 1.19-1.50]. Irritable bowel syndrome patients with constipation may receive benefit from fibre treatment (relative risk, 1.56; 95% CI, 1.21-2.02), but there was no evidence that fibre was effective in the relief of abdominal pain in irritable bowel syndrome. Soluble and insoluble fibre, separately, had different effects on global irritable bowel syndrome symptoms. Soluble fibre (psyllium, ispaghula, calcium polycarbophil) showed significant improvement (relative risk, 1.55; 95% CI, 1.35-1.78), whereas insoluble fibre (corn, wheat bran), in some cases, worsened the clinical outcome, but there was no significant difference compared with placebo (relative risk, 0.89; 95% CI, 0.72-1.11).

CONCLUSIONS

The benefits of fibre in the treatment of irritable bowel syndrome are marginal for global irritable bowel syndrome symptom improvement and irritable bowel syndrome-related constipation. Soluble and insoluble fibres have different effects on global irritable bowel syndrome symptoms. Indeed, in some cases, insoluble fibres may worsen the clinical outcome. Future clinical studies evaluating the effect and tolerability of fibre therapy are needed in primary care.