Assessment and treatment of functional disorders in general practice: the extended reattribution and management model--an advanced educational program for nonpsychiatric doctors

Functional illness in primary care: dysfunction versus disease

BACKGROUND

The Biopsychosocial Model aims to integrate the biological, psychological and social components of illness, but integration is difficult in practice, particularly when patients consult with medically unexplained physical symptoms or functional illness.

DISCUSSION

This Biopsychosocial Model was developed from General Systems Theory, which describes nature as a dynamic order of interacting parts and processes, from molecular to societal. Despite such conceptual progress, the biological, psychological, social and spiritual components of illness are seldom managed as an integrated whole in conventional medical practice. This is because the biomedical model can be easier to use, clinicians often have difficulty relinquishing a disease-centred approach to diagnosis, and either dismiss illness when pathology has been excluded, or explain all undifferentiated illness in terms of psychosocial factors. By contrast, traditional and complementary treatment systems describe reversible functional disturbances, and appear better at integrating the different components of illness. Conventional medicine retains the advantage of scientific method and an expanding evidence base, but needs to more effectively integrate psychosocial factors into assessment and management, notably of 'functional' illness. As an aid to integration, pathology characterised by structural change in tissues and organs is contrasted with dysfunction arising from disordered physiology or psychology that may occur independent of pathological change.

SUMMARY

We propose a classification of illness that includes orthogonal dimensions of pathology and dysfunction to support a broadly based clinical approach to patients; adoption of which may lead to fewer inappropriate investigations and secondary care referrals and greater use of cognitive behavioural techniques, particularly when managing functional illness.

Financing mental health and substance use disorder care within physical health: a look to the future

After sharing several case examples of health care for patients who have mental health/substance use disorders (MH/SUDs) in the current health care environment, this article describes the advantages that would occur if assessment and treatment of MH/SUDs became a clinical, administrative, and financial part of physical health with common provider networks, the ability to combine service locations (integrated clinics and inpatient units), similar coding and billing procedures, and a single funding pool. Because transition to such a system is complicated, the article then describes several process changes that would be required for integrated service delivery to take place.

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

Objective

About 13% of GPs’ consultations involve unexplained complaints (UCs). These complaints can progress to chronic conditions like medically unexplained symptoms, chronic functional symptoms or somatoform disorders. Little is known about the demographic characteristics and quality of life of patients with early stage UCs. Our study objective was to describe these characteristics. Additionally we compared them with other patient groups to serve as a frame of reference.

Methods

Descriptive study in general practices. Patients with early stage UCs who had not had elaborate diagnostic investigations were included. Demographic characteristics were compared to a Dutch general practice population. Quality of life scores were measured with the RAND-36 and compared to another Dutch general practice population and to depressed patients.

Results

Data of 466 patients were available for analysis. Mean age was 44 years and 74% were females, mostly higher educated. Of the patients, 63% presented with unexplained fatigue. On average, quality of life was poor (mean RAND-36 domain scores 37–73), also in comparison with other groups.

Conclusion

General practice patients presenting with UCs have a remarkably poor quality of life. Future research should explore how early identification of patients at risk of developing chronicity can take place. Awareness of potential poor quality of life may influence GPs' medical decision making.

Short-term psychotherapeutic interventions for somatizing patients in the general hospital: a randomized controlled study

BACKGROUND

Treatment acceptance and motivation for psychotherapy of somatizing patients in the general hospital is low.

METHODS

Patients (n = 91) fulfilling the criteria for somatization were randomized into an intervention group (n = 49) and a control group (n = 42). The patients in the intervention group attended 5 psychotherapeutic sessions based on the modified reattribution model. The patients in the control group received psychoeducational reading material. The primary outcomes were motivation for psychotherapy and contacting a psychotherapist after discharge. The secondary outcomes consisted of changes regarding somatoform symptoms, emotional distress and quality of life.

RESULTS

Patients from the intervention group were significantly more motivated for psychotherapy (p = 0.001) than patients from the control group. At the 3-month follow-up, 42% of the patients from the intervention group had contacted a psychotherapist, compared to 20% of the patients from the control group (p = 0.045). At the 6-month follow-up, however, the ratio of patients having contacted a psychotherapist had changed to 44 and 29%, respectively, and was no longer significant. The intensity of somatoform symptoms and the anxiety symptoms decreased and mental functioning improved significantly over time for patients from both groups.

CONCLUSIONS

Short-term psychotherapeutic interventions for somatizing patients in general hospitals have a moderately better effect on motivation for psychotherapy and contacting a psychotherapist than psychoeducational reading material alone. Future studies should attempt to prove the effectiveness of short-term psychoeducational interventions for somatizing patients in the general hospital.

The cognitive behavioural model of medically unexplained symptoms: A theoretical and empirical review

The article is a narrative review of the theoretical standing and empirical evidence for the cognitive behavioural model of medically unexplained symptoms (MUS) in general and for chronic fatigue syndrome (CFS) and irritable bowel syndrome (IBS) in particular. A literature search of Medline and Psychinfo from 1966 to the present day was conducted using MUS and related terms as search terms. All relevant articles were reviewed. The search was then limited in stages, by cognitive behavioural therapy (CBT), condition, treatment and type of trial. Evidence was found for genetic, neurological, psychophysiological, immunological, personality, attentional, attributional, affective, behavioural, social and inter-personal factors in the onset and maintenance of MUS. The evidence for the contribution of individual factors, and their autopoietic interaction in MUS (as hypothesised by the cognitive behavioural model) is examined. The evidence from the treatment trials of cognitive behavioural therapy for MUS, CFS and IBS is reviewed as an experimental test of the cognitive behavioural models. We conclude that a broadly conceptualized cognitive behavioural model of MUS suggests a novel and plausible mechanism of symptom generation and has heuristic value. We offer suggestions for further research.

A randomized controlled trial of brief training in the assessment and treatment of somatization in primary care: effects on patient outcome

OBJECTIVE

Our aim was to evaluate the effect of an educational program designed to improve care for somatizing patients in primary care.

METHOD

Evaluation was performed during routine clinical care in a cluster randomized controlled trial. Patients were included consecutively, and those with a high score on rating scales for somatization were selected for follow-up (n=911). Follow-up was conducted 3 months (response rate=0.74) and 12 months (response rate=0.69) after inclusion using questionnaires measuring quality of life (Medical Outcomes Study 36-Item Short Form), disability days (WHO's Disability Assessment Schedule), somatization (Whiteley-7 and Symptom Checklist Somatic Symptom Scale) and patient satisfaction (European Project on Patient Evaluation of General Practice Care). We analyzed differences from baseline to follow-up and compared these for intervention and control groups.

RESULTS

Self-reported health improved in both intervention and control groups during follow-up for patients with a high score for somatization, but changes were small. We could not demonstrate any difference between the control group and the intervention group with regard to our primary outcome 'physical functioning.' Patients in the intervention group tended to be more satisfied at 12-month follow-up than those in the control group, but this difference fell short of statistical significance.

CONCLUSION

Training of primary care physicians showed no statistically significant effect on clinical outcome and showed nonsignificant improvement in patient satisfaction with care for patients with a high score for somatization.

Management of functional somatic syndromes

Although functional somatic syndromes (FSS) show substantial overlap, treatment research is mostly confined to single syndromes, with a lack of valid and generally accepted diagnostic criteria across medical specialties. Here, we review management for the full variety of FSS, drawn from systematic reviews and meta-analyses since 2001, and give recommendations for a stepped care approach that differentiates between uncomplicated and complicated FSS. Non-pharmacological treatments involving active participation of patients, such as exercise and psychotherapy, seem to be more effective than those that involve passive physical measures, including injections and operations. Pharmacological agents with CNS action seem to be more consistently effective than drugs aiming at restoration of peripheral physiological dysfunction. A balance between biomedical, organ-oriented, and cognitive interpersonal approaches is most appropriate at this truly psychosomatic interface. In view of the iatrogenic component in the maintenance of FSS, doctor-centred interventions and close observation of the doctor-patient relationship are of particular importance.

Do illness perceptions predict health outcomes in primary care patients? A 2-year follow-up study

OBJECTIVE

Little is known about whether illness perceptions affect health outcomes in primary care patients. The aim of this study was to examine if patients' illness perceptions were associated with their self-rated health in a 2-year follow-up period.

METHODS

One thousand seven hundred eighty-five primary care patients presenting a new or recurrent health problem completed an adapted version of the illness perception questionnaire and the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) at baseline and 3, 12, and 24 months' follow-up. Linear regressions were performed for (1) all patients, (2) patients without chronic disorders presenting physical disease, and (3) patients presenting medically unexplained symptoms (MUS).

RESULTS

Negative illness perceptions were associated with poor physical and mental health at baseline. They most strongly predicted changes in health status at follow-up for the whole group of patients. Patients presenting with MUS had more negative illness perceptions and lower mental and physical components subscale of the SF-36 scores at all time points.

CONCLUSIONS

Patients' perception of a new or recurrent health problem predicts self-reported physical and mental health up to 2 years after consulting the general practitioner and offers an obvious starting point for addressing nonbiomedical aspects of illness.

Innovative Reflecting Interview: Effect on High-Utilizing Patients with Medically Unexplained Symptoms

This pilot study was conducted to determine the effect of an innovative reflecting interview on the health care utilization, physical health, mental function, and health care satisfaction of high-utilizing primary care patients with medically unexplained physical symptoms. Twenty-four high-utilizing patients met study selection criteria and were randomly assigned to a no-intervention control group or a reflecting interview intervention group. Outcomes were measured at 4 weeks, 6 months, and 1 year after the date of study enrollment. Results indicated that high-utilizing patients with medically unexplained physical symptoms who participated in a reflecting interview had reduced total health care costs, primarily through the reduction of hospitalization or inpatient expenses, despite a modest increase in outpatient primary care clinic visits. These data suggest that participation in a reflecting interview and regular visits with a primary care clinician can decrease health care utilization without adversely affecting patient satisfaction.

Models of integrated care

This article describes the range of options for integrating medicine and psychiatry, with a focus on the advantages and limitations of each model. The models were developed in different countries with specific health care cultures. This article illustrates the range of in- and outpatient options as currently practiced, with case reports from practitioners when possible, and describes qualifications for practicing in each model, the settings, the patient populations, the relevant financial issues, and the advantages and disadvantages of practicing in each model. It closes with comments on the next steps for advancing integrated care and the barriers to be overcome.

Symptoms, syndromes, and the value of psychiatric diagnostics in patients who have functional somatic disorders

Half of all outpatient encounters are precipitated by physical complaints, of which one third to one half are medically unexplained symptoms, and 20% to 25% are chronic or recurrent. Many of the patients suffer from one or more discrete symptoms, whereas others have functional somatic syndromes. Individual symptoms and somatic syndromes are associated with impaired quality of life, increased health care use, and diminished patient and provider satisfaction. This article provides an overview of (1) unexplained symptoms and somatization; (2) limitations of Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition in classifying somatoform disorders; (3) predictors of psychiatric comorbidity in patients who have physical symptoms; and (4) measurement and management of symptoms.

Coping with headache

OBJECTIVE

To describe self-initiated actions and cognitive strategies used for coping by women who suffer from episodic tension-type headache.

DESIGN

Qualitative data from focus-group interviews were analysed according to Giorgi's phenomenological approach, inspired by Lazarus's theory of coping.

SUBJECTS

A total of 15 women with tension-type headache, 20-60 years old, were recruited to three different focus groups through newspaper advertising.

RESULTS

To cope with episodic tension-type headache, rhythm and balance in actions like eating, drinking, and sleeping were essential. Several women used thermal modulation. Exercise was important. Taking charge of their own time, pace, and level of commitment and accepting the fact that they had to live with their headache were cognitive strategies used.

IMPLICATIONS

The general practitioner should identify the woman's choice of actions and cognitive strategies to manage her headache, and support her coping skills.

Differentiation of somatizing patients in primary care: why the effects of treatment are always moderate

The heterogeneity of somatizing patients influences outcomes, especially in unselected samples in primary care. A cluster analysis was performed as secondary analysis on an existing data set of 127 somatizing patients included in a randomized controlled clinical trial. Anxiety and depression (HADS), number and intensity of physical symptoms (SOMS), physical and emotional functioning (short form of the SF-36 Health Survey), health beliefs (KKU-G), and psychological distress (General Health Questionnaire) were used for clustering. Outcome, treatment satisfaction, and diagnosis were calculated and compared for the clusters. We differentiated three groups from this analysis: one with elevated emotional and physical stress, one in which emotional stress dominated, and one with low emotional and physical stress. The three groups did not differ in diagnoses of somatoform disorders. The high-stress groups improved over time, whereas the depression and emotional-functioning scores in the low-stress group deteriorated. All patients were satisfied with the treatment provided. Deterioration in the scores of the low-stress group may be a result of a clinically valuable change process, in that patients who were initially in denial were able to open up and admit their problems. The increased satisfaction with treatment supports this interpretation. This so-called response shift must be taken into account in the planning of studies.

The patients' illness perceptions and the use of primary health care

OBJECTIVE

To investigate if primary care patients' perceptions of a current health problem were associated with use of health care.

METHOD

One thousand seven hundred eighty-five patients presenting a new health problem to 1 of 38 physicians from 28 general practices in Aarhus County, Denmark. Patients completed a questionnaire on their illness perceptions and emotional distress before the consultation. The physicians completed a questionnaire for each patient on diagnostics and prognostics. Register data on primary health care utilization 3 years before and 2 years after baseline were obtained. Odds ratios were estimated to examine associations between previous health care use and illness perceptions. Linear regression analysis was performed to examine if illness perceptions predicted later health care use.

RESULTS

Previous use: Higher use was associated with psychosocial, stress, and lifestyle attributions. Accident/chance attributions were associated with higher use for patients with a chronic disorder but with lower use for patients without a chronic disorder. A strong illness identity (number of self-reported symptoms), illness worry, a long timeline perspective, a belief that the symptoms would have serious consequences, and all emotional distress variables were associated with higher use. Use during follow-up: Infection/lowered immunity attributions were associated with higher use for patients with a chronic disorder, whereas psychosocial and lifestyle attributions were associated with higher use for all patients. Illness worry and all emotional distress variables predicted higher health care use. A strong illness identity, a long timeline perspective, a belief in serious consequences, and stress and accident/chance attributions were among the strongest predictors of health care use in a multivariate model including all variables.

CONCLUSIONS

Patients' perceptions of a current health problem are associated with health care use and may offer an obvious starting point for a biopsychosocial approach in primary care.

The uncertain consultation and patient satisfaction: the impact of patients' illness perceptions and a randomized controlled trial on the training of physicians' communication skills

OBJECTIVE

To identify predictors of patient satisfaction among a range of patient and practitioner variables. In particular, to focus on patients' illness perceptions and the impact of a randomized controlled trial on the training of physicians in general communication skills and how to treat patients presenting with poorly defined illness.

METHODS

A randomized controlled follow-up study conducted in 28 general practices in Aarhus County, Denmark. Half of the physicians were randomized into an educational program on treatment of patients presenting with medically unexplained symptoms (somatization). One thousand seven hundred eighty-five general practice attenders presenting a new health problem completed questionnaires on illness perceptions, physical functioning, and mental distress before the consultation. After the consultation, a questionnaire including relational and communicative domains of patient satisfaction with the current consultation was completed. The physicians completed a questionnaire for each patient on diagnostics and prognostics. Predictors of patient satisfaction were determined by logistic regression.

RESULTS

A large number of patient and practitioner variables predicted satisfaction in univariate logistic regression models. Results from a multivariate logistic model showed that the illness perceptions "uncertainty" (patient not knowing what is wrong) and "emotional representations" (the complaint making the patient feel worried, depressed, helpless, afraid, hopeless) predicted dissatisfaction at OR (CI) = 1.8 (1.3-2.4), p < .001 and OR (CI) = 1.5 (1-2.3), p = .03 respectively. Trained physicians were associated with dissatisfaction at OR (CI) 0.7 (0.5-1), p = .06 in the multivariate model. Furthermore, uncertain patients consulting a trained physician were less likely to be dissatisfied OR (CI) = 0.6 (0.3-1), p = .04.

CONCLUSIONS

A randomized controlled trial on the training of general practitioners' communication skills improved patient satisfaction. Illness perceptions predict satisfaction. In particular, patients feeling uncertain and negatively emotionally involved in their health problem were more inclined to being dissatisfied with the consultation.

Classification of somatization and functional somatic symptoms in primary care

OBJECTIVE

A substantial proportion of patients found in primary care complain of physical symptoms not attributable to any known conventionally defined disorder, that is, medically unexplained or functional somatic symptoms. The objective of this paper is to outline the problems with the current classification and propose a classification more suitable for primary health care.

METHOD

We refer to and discuss relevant literature including papers on our own research on the topic in the light of our experiences from major projects on somatizing patients in primary health care.

RESULTS

Functional somatic symptoms may impose severe suffering on the patient and are costly for society because of high health-care utilization, lost working years and social expenses. At present, studies on functional somatic symptoms and disorders and their treatment are hampered by lack of a valid and reliable diagnostic classification. The diagnostic categories of somatoform disorders are overlapping. Thus, the present situation is that patients with identical symptoms and clinical pictures may receive different diagnostic labels depending on the focus of interests of the assessing physician. A particular problem in primary care is that the somatoform diagnostic categories only include persistent cases and do not offer the opportunity for classification of the patients with short-symptom duration found in this setting. We present a framework for a new descriptive classification of functional somatic symptoms and unfounded illness worrying, and outline a new classification that covers the whole spectrum of severity seen in clinical practice.

CONCLUSION

A precondition for an appropriate management of patients with functional somatic symptoms is a valid taxonomy common for all medical specialties facilitating cooperative care. Classification systems as outlined in this paper may be a candidate for such a system, but it should be subject to further evaluation in research.

Rethinking the place of the psyche in health: toward the integration of health care systems

OBJECTIVE

To review the value provided when health care systems independently manage medical and psychiatric care.

METHOD

The authors draw on data from the world literature, their own experiences and reflections (one author as an international consultant in the coordination of physical and behavioural health care), and input from colleagues throughout the world who face similar challenges to improve outcomes for complex, high cost patients in their own health care systems.

RESULTS

Most health care systems in the world approach the administration and delivery of mental health care separately from that of general medical care. This practice is no longer supported as effective, efficient or inexpensive. Rather accumulating data indicates that concurrent and coordinated medical and psychiatric care, which can only be accomplished by integrating physical and behavioural health through infrastructure change, should replace the present system of independently provided sequential care; that is, one which provides first medical and then psychiatric treatment, or vice versa, with little communication between clinicians in the two sectors.

CONCLUSIONS

By making mental health treatment an integral part of general medical care through reorganization of the funding system, a higher percentage of those now untreated for their psychiatric disorders, both within and outside of the medical setting, can have their mental health needs addressed in coordination with their physical disorders. At the same time, the number of patients that can be treated within the same budget will be expanded.

Screening for common mental disorders: who will benefit? Results from a randomised clinical trial

BACKGROUND

Outcomes of studies on mental health screening in primary care are conflicting. A feasible and effective case-finding approach could benefit both GPs and their patients.

OBJECTIVES

(1) to examine the effect of using a composite screening questionnaire (SQ) on GPs' recognition and provision of care, and (2) to outline useful strategies for case-finding.

METHODS

38 GPs in Aarhus County, Denmark, volunteered to participate in this trial. 1785 consecutive patients aged 18-65 years consulting with new health problems were included. Patients were screened before consultation using an SQ including scales for somatisation, anxiety, depression and alcohol abuse. Patients were randomised into one of two groups: 900 questionnaires were disclosed to and scored by GPs, 885 were blinded. Number of diagnoses, subjects of conversation, and actions taken were analysed. Additional analyses aimed to identify GP and patient factors that could predict improved outcomes.

RESULTS

Overall, disclosure of SQ results increased GPs' recognition of mental disorders by 3.8% [95% confidence interval (CI) -0.5% to 8.0%], and 6.6% (95% CI 1.2% to 12.0%) for patients screened positive. There was a marked variation in GPs' detection rates, and for GPs with moderate or low recognition rates increases were significant (P = 0.001). Conversation on psychological topics increased by 3.2% (95% CI -0.7% to 7.1%), and by 7.0% (95% CI 1.8% to 12.3%) for patients screened positive. Rates of planned follow-up consultations increased by 3.9% (95% CI 0.6% to 7.3%) and by 4.9% (95% CI 0.7% to 9.1%) for patients screened positive. GPs' self-reported benefit from screening was related to better outcomes. A range of patient and GP factors suggesting added value from using SQs were identified.

CONCLUSION

GPs' recognition and provision of mental health care can be influenced by the use of composite SQs. Perceived benefit from screening may serve as a useful predictor of better patient management. Pragmatic case-finding approaches need further evaluation.

A randomised controlled trial of brief training in assessment and treatment of somatisation: effects on GPs' attitudes

BACKGROUND

Somatising patients frequently present in primary care but GPs often express frustration in dealing with them. A negative attitude may result in missed diagnoses and ineffective treatment.

OBJECTIVE

This study aimed to evaluate the effect of a novel, multifaceted training programme on GPs' attitudes towards somatisation.

METHODS

The study was performed as a cluster randomised controlled trial with practices as randomisation unit and with a follow-up period of 12 months. Forty-three GPs from 27 practices in Vejle County, Denmark participated. The intervention consisted of a cognitive-oriented educational programme on assessment, treatment and management of somatisation (The Extended Reattribution and Management Model). Outcome measures were GPs' attitudes toward somatoform disorder and somatisation in general measured by the means of questionnaires at baseline and follow-up. The primary outcome was a change in response.

RESULTS

Baseline values confirmed previous findings that GPs find it difficult to deal with somatising patients. Compared with the control doctors, intervention doctors' attitudes towards patients with somatoform disorders had changed significantly 12 months after training on the parameters enjoyment (P = 0.008) and anxiety (P = 0.002). Doctors also felt more comfortable in dealing with somatising patients in general (P = 0.002). Attitudes about other parameters related to the doctors feelings, aetiology and course of somatisation changed in the expected direction, but these changes were not statistically significant.

CONCLUSION

A brief multifaceted training programme focussing on somatisation was accompanied by a significant change in GPs' attitude towards patients with somatoform disorders.

Functional symptoms in neurology: questions and answers

Between 10 and 30% of patients seen by neurologists have symptoms for which there is no current pathophysiological explanation. The objective of this review is to answer questions many neurologists have about disorders characterised by unexplained symptoms (functional disorders) by conducting a multidisciplinary review based on published reports and clinical experience. Current concepts explain functional symptoms as resulting from auto-suggestion, innate coping styles, disorders of volition or attention. Predisposing, precipitating, and perpetuating aetiological factors can be identified and contribute to a therapeutic formulation. The sympathetic communication of the diagnosis by the neurologist is important and all patients should be screened for psychiatric or psychological symptoms because up to two thirds have symptomatic psychiatric comorbidity. Treatment programmes are likely to be most successful if there is close collaboration between neurologists, (liaison) psychiatrists, psychologists, and general practitioners. Long term, symptoms persist in over 50% of patients and many patients remain dependent on financial help from the government. Neurologists can acquire the skills needed to engage patients in psychological treatment but would benefit from closer working relationships with liaison psychiatry or psychology.

Psychosocial interventions for somatizing patients by the general practitioner: a randomized controlled trial

OBJECTIVE

The objective of this study was to compare the effects of psychosocial interventions based on the modified reattribution model for somatizing patients in general practice (GP) with those of nonspecific psychosocial primary care (PPC) alone.

METHODS

Forty-two GPs were randomized, 23 into the intervention group (IG), who were trained in reattribution techniques, and 19 into the control group (CG). One hundred twenty-seven patients were included. Primary outcome measures were somatoform symptoms and quality of life.

RESULTS

Multilevel modeling revealed a reduction of physical symptoms (P = .007), an improvement in physical functioning (P = .0172), and a reduction of depression (P = .0211) and anxiety (P = .0388) in the IG compared with the CG at the 3-month follow-up. However, results no longer remained significant after controlling for baseline and covariate variables besides a reduction of physical symptoms at 6-month follow-up (P = .029).

CONCLUSION

Compared with nonspecific PPC, the effects of reattribution techniques were small and limited to physical symptoms.

Should we maintain the 95 percent reference intervals in the era of wellness testing? A concept paper

The reference interval is probably the most widely used decision-making tool in clinical practice, with a modern use aiming at identifying wellness during health check and screening. Its use as a diagnostic tool is much less recognised and may be obsolete.

The present study investigates the consequences of the newpractice for the interpretation of prospective value, negative vs. positive, the probability of confirming wellness, and number of false results based on selected strategy for reference interval establishment.

Calculations assumed normalised Gaussian-distributed reference intervals with analytical variation set to zero and absolute accuracy. Also assumed is the independency of tests. Probability for no values outside reference intervals in healthy subjects was calculated from the formula p

Use of the 99.9 centile for health checks will increase the probability for no false from 60% to 99% for 10 tests, and from 46% to 98% for 15 tests.

The probability for one false-positive result in 10 tests in a panel can be reduced from 32% to 1% if the 99.9% centile is substituted for the 95% centile. For two in 10 tests, the probability can be reduced from 8% to below 0.1%. In both cases, selection of the 99.9% centile improves the diagnostic accuracy.

Reference intervals are needed as a “true” negative reference for absence of disease, and should cover the 99.9% centile of the reference distribution of an analyte to avoid false positives. For this new use, it is critical that reference persons are absolutely normal without clinical, genetic and biochemical signs of the condition being investigated. However, reference intervals cannot substitute clinical decision limits for diagnosis and medical intervention.

Treating patients with medically unexplained symptoms in primary care

BACKGROUND

There are no proven, comprehensive treatments in primary care for patients with medically unexplained symptoms (MUS) even though these patients have high levels of psychosocial distress, medical disability, costs, and utilization. Despite extensive care, these common patients often become worse.

OBJECTIVE

We sought to identify an effective, research-based treatment that can be conducted by primary care personnel.

DESIGN

We used our own experiences and files, consulted with experts, and conducted an extensive review of the literature to identify two things: 1). effective treatments from randomized controlled trials for MUS patients in primary care and in specialty settings; and 2). any type of treatment study in a related area that might inform primary care treatment, for example, depression, provider-patient relationship.

MAIN RESULTS

We developed a multidimensional treatment plan by integrating several areas of the literature: collaborative/stepped care, cognitive-behavioral treatment, and the provider-patient relationship. The treatment is designed for primary care personnel (physicians, physician assistants, nurse practitioners) and deployed intensively at the outset; visit intervals are progressively increased as stability and improvement occur.

CONCLUSION

Providing a comprehensive treatment plan for chronic, high-utilizing MUS patients removes one barrier to treating this common problem effectively in primary care by primary care personnel.