Validation of the 2010 American College of Rheumatology preliminary diagnostic criteria for fibromyalgia in an Iranian population

Comparative effectiveness of Maitland Spinal Mobilization versus myofascial techniques on pain and symptom severity in women with Fibromyalgia syndrome: A quasi-randomized clinical trial with 3-month follow up

OBJECTIVE

The aim of this experimental study was to determine which manual therapy approach is more effective in addressing health status by improving symptoms (sensory, cognitive, emotional, and social) in patients with fibromyalgia.

MATERIAL AND METHODS

A quasi-randomized clinical trial with 3-month follow-up was conducted in 52 female patients (age 52.5 ± 8.1 years) affected by rheumatologist-diagnosed Fibromyalgia and evaluated at the Asociación de Fibromialgia y Síndrome de Fatiga Crónica (AFINSYFACRO) in Móstoles and AFIBROM, Madrid, Spain. Two manual therapy approaches were applied: the myofascial technique approach (MTA) and Maitland Mobilization Approach (MMA). The study examined the following outcomes: Widespread Pain, Symptom Severity, Impact on Quality of Life, Perceived Pain, Sensitization-Associated Pain, Sleep Quality, Physical Activity, and Psychological, Cognitive, and Emotional Factors. Patient Satisfaction was also assessed.

RESULTS

No significant differences were found between groups over time for most variables. However, the MTA group showed significant improvements in pain intensity, central sensitization, general health, sleep quality, and anxiety compared with the MMA group.

CONCLUSIONS

Despite the lack of between-group differences in all variables over time, MTA may be useful in the treatment of fibromyalgia, reducing pain, central sensitization, and negative emotional symptoms, as well as improving general health and sleep quality. Due to problems during the study, randomization was abandoned. This problem becomes a virtue by taking advantage of the situation to apply statistical compensation methods, which will serve as a guide for future research that suffers from this problem. We suggest the inclusion of longer follow-up periods in future studies.

Prevalence of Vitamin D Deficiency and Its Relationship with Clinical Outcomes in Patients with Fibromyalgia: a Systematic Review of the Literature

Fibromyalgia is a debilitating chronic condition which poses a therapeutic challenge to the clinician. With a large backlog in patient flow subsequent to the COVID-19 pandemic and rising numbers of patients with post-acute sequelae of COVID-19 (PASC) presenting with fibromyalgia-like clinical features, there is an increasingly pressing need to identify broad cost-effective interventions. Low levels of vitamin D have previously been reported in patients with fibromyalgia, though any causative link has been difficult to establish. A systematic literature review on the association between vitamin D deficiency and fibromyalgia was performed examining retrospective evidence both for and against an association between vitamin D deficiency (VDD) and fibromyalgia and evaluating the therapeutic benefit from supplementation. A group of six studies were selected based on relevance, use of controls, quality of research and citations. Four primary studies assessing the prevalence of VDD in fibromyalgia patients versus controls were evaluated with a total 3,496 subjects. Three included females only and one larger study assessed males. Two (n = 313) concluded the presence of a statistically significant association, and two (n = 161) found none. Two randomised controlled trials assessing the effect of vitamin D supplementation in a total of 80 subjects found conflicting results, with pain reduction in one and none in the other. It is likely there exists an association between VDD deficiency and fibromyalgia in a large subset of patients, although establishing primary causation is difficult. There is a need for larger randomised controlled trial designs with more effective comparison with healthy subjects and control for confounding factors. Given VDD is a major problem in the general population, we recommend supplementation be recommended by healthcare professionals to fibromyalgia patients for the purpose of maintaining bone health given their potentially increased susceptibility to developing deficiency and its sequelae.

Exposure to Potentially Traumatic Events, Posttraumatic Stress Symptoms, Pain Catastrophizing, and Functional Somatic Symptoms Among Individuals With Varied Somatic Symptoms: A Moderated Mediation Model

The relationships between exposure to potentially traumatic events (PTEs), as well as posttraumatic stress symptoms (PTSS) and somatic syndromes, have recently been exemplified. Exposure to PTEs can also set in motion complex psychological processes such as pain catastrophizing that is associated with PTSS and somatic syndromes. However, the specific moderating role of pain catastrophizing in these links remains relatively unexamined. The present study aims to assess a moderated mediation model in which catastrophizing will moderate the indirect effect of exposure to PTEs on the number of somatic symptoms and chronic pain severity via PTSS, among individuals with somatic syndromes. A volunteers' sample of 175 Israeli adults with varied somatic symptoms responded to online validated self-report questionnaires in a cross-sectional designed study. Participants' self-reported PTSS rates (57.1%) were high. PTSS and pain catastrophizing, but not exposure to PTEs, were related to chronic pain severity. Interestingly, a moderated mediation analysis indicated that the indirect effect of catastrophizing in the relation between exposure to PTEs and the number of somatic symptoms via PTSS existed only among those with high levels of catastrophizing. The present study highlights the assumption that functional somatic syndromes (FSS) have much in common. Our findings support a moderated mediation model that begins with exposure to PTEs that leads to PTSS, which in turn increase the number of somatic symptoms. Higher levels of pain catastrophizing might attenuate this indirect link by affecting the interpretation of PTSS and create a vulnerability to more somatic symptoms. Thus, changes in cognitive-sensory processing in the form of catastrophic thinking can affect psychobiological processes and heighten sensitivity to stimuli arising in the body and should be considered as possible target for future research and psychological interventions.

Psychometric Properties of the Fibromyalgia Survey Questionnaire in Chilean Women With Fibromyalgia

OBJECTIVE

The aim of this study was to evaluate the psychometric properties of the Chilean version of the Fibromyalgia Survey Questionnaire (FSQ).

METHODS

Women with fibromyalgia (FM; n = 214), women with rheumatoid arthritis (RA; n = 97), and women without chronic pain (being followed by Gynecology, G; n = 117) from the Red de Salud UC CHRISTUS (Santiago, Chile) participated. Women with FM completed the FSQ, Fibromyalgia Impact Questionnaire (Revised Version), Numerical Pain Rating Scale, Pain Catastrophizing Scale, Pain Vigilance and Awareness Questionnaire, Patient Health Questionnaire 15, and Short-Form Health Survey. Two weeks later, they completed the FSQ again by phone (n = 120).

RESULTS

The FSQ total scale showed excellent to good internal consistency at T1 (α = 0.91, ω = 0.91) and T2 (α = 0.78, ω = 0.78), and good test-retest reliability (intraclass correlation coefficient, 0.79; 95% confidence interval [CI], 0.72-0.85). It showed medium to large correlations with the other measures. Discriminant analysis between the FM group and the control group (RA and G) revealed that the FSQ total scale reached a classification accuracy of 81.3%. Receiver operating characteristic curve (adjusted area under the curve, 0.88; 95% CI, 0.85-0.92) showed that the best FSQ cutoff was 17, resulting in sensitivity of 89% (95% CI, 0.84-0.93) and specificity of 75% (95% CI, 0.69-0.80). Considering the FM diagnosis performed by a rheumatologist as the criterion standard, sensitivity and specificity of the modified 2010 American College of Rheumatology preliminary criteria for FM were 92.8% (95% CI, 0.88-0.96) and 63.4% (95% CI, 0.57-0.70), respectively.

CONCLUSIONS

The Chilean version of the FSQ presents good psychometric properties and is a useful tool in clinical settings to assist in FM diagnosis and symptom assessment. A cutoff score of 17 or higher seems to be the most appropriate for Chilean population.

Associations Between Posttraumatic Stress Symptoms, Anxiety Sensitivity, Socially Prescribed Perfectionism, and Severity of Somatic Symptoms Among Individuals with Fibromyalgia

OBJECTIVES

The contribution of psychological risk factors to the intensification of pain experienced among individuals with fibromyalgia syndrome (FMS) is relatively under-studied. The present study aims to explore associations between FMS-related somatic symptom severity and two personality tendencies: anxiety sensitivity (AS) and socially prescribed perfectionism (SPP). Furthermore, the relative contributions of these personality tendencies are examined vis-à-vis the experience of potentially traumatic events (PTEs) and the psychopathology of posttraumatic stress symptoms (PTSS).

METHODS

A volunteer sample of 117 Israeli adults with FMS responded to online validated self-report questionnaires regarding their PTEs, PTSS, somatic symptom severity, FMS, AS, and SPP in a cross-sectional study.

RESULTS

Participants' self-reported PTSS rates (61.5%) were high. AS and SPP were positively related to somatic symptom severity. Interestingly, we found that PTSS positively predicted the severity of somatic symptoms above and beyond the contributions of AS and SPP.

CONCLUSIONS

The present study supports the assumption that psychological risk factors may affect the expression of somatic symptoms and the interpretation of pain stimulus arising in the body that might eventually be experienced as excessively painful. The study also suggests that above and beyond psychological risk factors, PTSS may express a high predominance and affect pain perception among participants with FMS.

Reliability, Factor Structure and Predictive Validity of the Widespread Pain Index and Symptom Severity Scales of the 2010 American College of Rheumatology Criteria of Fibromyalgia

Fibromyalgia syndrome (FMS) is a chronic condition of widespread pain. In 2010, the American College of Rheumatology (ACR) proposed new diagnostic criteria for FMS based on two scales: the Widespread Pain Index (WPI) and Symptoms Severity (SS) scale. This study evaluated the reliability, factor structure and predictive validity of WPI and SS. In total, 102 women with FMS and 68 women with rheumatoid arthritis (RA) completed the WPI, SS, McGill Pain Questionnaire, Trait Anxiety Inventory, Fatigue Severity Scale, Oviedo Quality of Sleep Questionnaire, and Beck Depression Inventory. Pain threshold and tolerance and a measure of central sensitization to pain were obtained by pressure algometry. Values on WPI and SS showed negative-skewed frequency distributions in FMS patients, with most of the observations concentrated at the upper end of the scale. Factor analysis did not reveal single-factor models for either scale; instead, the WPI was composed of nine pain-localization factors and the SS of four factors. The Cronbach’s α (i.e., Internal consistency) was 0.34 for the WPI,0.83 for the SS and 0.82 for the combination of WPI and SS. Scores on both scales correlated positively with measures of clinical pain, fatigue, insomnia, depression, and anxiety but were unrelated to pain threshold and tolerance or central pain sensitization. The 2010 ACR criteria showed 100% sensitivity and 81% specificity in the discrimination between FMS and RA patients, where discrimination was better for WPI than SS. In conclusion, despite their limited reliability, both scales allow for highly accurate identification and differentiation of FMS patients. The inclusion of more painful areas in the WPI and of additional symptoms in the SS may reduce ceiling effects and improve the discrimination between patients differing in disease severity. In addition, the use of higher cut-off values on both scales may increase the diagnostic specificity in Spanish samples.

Diagnostic Criteria for Fibromyalgia: Critical Review and Future Perspectives

Fibromyalgia syndrome (FMS) is a chronic illness characterized by widespread pain and other clinical and emotional symptoms. The lack of objective markers of the illness has been a persistent problem in FMS research, clinical management, and social recognition of the disease. A critical historical revision of diagnostic criteria for FMS, especially those formulated by the American College of Rheumatology (ACR), was performed. This narrative review has been structured as follows: Introduction; historical background of FMS, including studies proposing and revising the diagnostic criteria; the process of development of the ACR FMS diagnostic criteria (1990 and 2010 versions); revisions of the 2010 ACR FMS diagnostic criteria; the development of scales based on the 2010 and 2011 criteria, which could help with diagnosis and evaluation of the clinical severity of the disease, such as the Polysymptomatic Distress Scale and the FMS Survey Questionnaire; relationships of prevalence and sex ratio with the different diagnostic criteria; validity and diagnostic accuracy of the ACR FMS criteria; the issues of differential diagnosis and comorbidity; the strength and main limitations of the ACR FMS criteria; new perspectives regarding FMS diagnosis; and the impact of the novel findings in the diagnosis of FMS. It is concluded that despite the official 2010 FMS diagnostic criteria and the diagnostic proposal of 2011 and 2016, complaints from health professionals and patients continue.

Comparing duloxetine and pregabalin for treatment of pain and depression in women with fibromyalgia: an open-label randomized clinical trial

BACKGROUND

Duloxetine and pregabalin are among the most widely used medications in the treatment of patients with fibromyalgia syndrome (FM).

OBJECTIVES

To add to the very few lines of evidence that exist on the comparative safety and efficacy of these two medications.

METHODS

In this open-label randomized clinical trial, outpatient women, who were diagnosed with FM based on American College of Rheumatology 2010 criteria, and had an age range of 18-65 years old were assigned to either duloxetine 30-60 mg or pregabalin 75-150 mg per day for 4 weeks. Patients were excluded in cases of having used duloxetine, pregabalin, gabapentin, or antidepressants within 12 weeks prior to the study, having had a history of comorbid medical conditions that could provoke chronic pain, or having had comorbid neuropsychiatric disorders, except for major depressive/anxiety disorders. Primary outcomes were between-group differences in mean score changes from baseline to end point for Widespread Pain Index (WPI) and Beck Depression Inventory-II. Secondary outcomes were the same statistical estimates, but for Fibromyalgia Impact Questionnaire-Revised and 12-Item Short Form Survey. Descriptive statistics and independent samples t-test were the main methods of analysis. ( www.irct.ir ; IRCT2016030626935N1).

RESULTS

Among all the scales, only WPI scores improved with a statistically significant difference between the two treatment arms, favoring duloxetine (Mean difference in score change - 2.32, 95% CI, -4.46 to - 0.18; p = 0.034; Cohen's d 0.53 95% CI, 0.04 to 1.02). Drop out rate and cumulative incidence of nausea was significantly higher in the duloxetine arm compared to the pregabalin arm.

CONCLUSION

This study provides further evidence on higher efficacy of duloxetine compared to pregabalin for the treatment of pain in patients with fibromyalgia. Future comprehensive pragmatic clinical trials are warranted.

Challenges in fibromyalgia diagnosis: from meaning of symptoms to fibromyalgia labeling

Fibromyalgia (FM) is a contested illness with ill-defined boundaries. There is no clearly defined cut-point that separates FM from non-FM. Diagnosis of FM has been faced with several challenges that occur, including patients' health care-seeking behavior, symptoms recognition, and FM labeling by physicians. This review focuses on important but less visible factors that have a profound influence on under- or over-diagnosis of FM. FM shows different phenotypes and disease expression in patients and even in one patient over time. Psychosocial and cultural factors seem to be a contemporary ferment in FM which play a major role in physician diagnosis even more than having severe symptom levels in FM patients. Although the FM criteria are the only current methods which can be used for classification of FM patients in surveys, research, and clinical settings, there are several key pieces missing in the fibromyalgia diagnostic puzzle, such as invalidation, psychosocial factors, and heterogeneous disease expression. Regarding the complex nature of FM, as well as the arbitrary and illusory constructs of the existing FM criteria, FM diagnosis frequently fails to provide a clinical diagnosis fit to reality. A physicians' judgment, obtained in real communicative environments with patients, beyond the existing constructional scores, seems the only reliable way for more valid diagnoses. It plays a pivotal role in the meaning and conceptualization of symptoms and psychosocial factors, making diagnoses and labeling of FM. It is better to see FM as a whole, not as a medical specialty or constructional scores.

A narrative review on the difficulties associated with fibromyalgia diagnosis

Fibromyalgia presents a clinical enigma as its pathophysiology is not well understood and its symptoms are nonspecific and overlap with many disorders, making its diagnosis a challenge for clinicians and researchers. Efforts have been made to develop a set of diagnostic criteria for this disorder. However, these criteria rely heavily on expert clinician opinion and produce a large heterogeneity within the diagnosed population. With no present specific technique reflecting the underlying pathophysiology of fibromyalgia, a definitive diagnosis of fibromyalgia remains elusive. This review discusses some problems and challenges associated with fibromyalgia diagnosis and presents some novel findings on the pathophysiological nature of fibromyalgia.

2016 Revisions to the 2010/2011 fibromyalgia diagnostic criteria

OBJECTIVES

The provisional criteria of the American College of Rheumatology (ACR) 2010 and the 2011 self-report modification for survey and clinical research are widely used for fibromyalgia diagnosis. To determine the validity, usefulness, potential problems, and modifications required for the criteria, we assessed multiple research reports published in 2010-2016 in order to provide a 2016 update to the criteria.

METHODS

We reviewed 14 validation studies that compared 2010/2011 criteria with ACR 1990 classification and clinical criteria, as well as epidemiology, clinical, and databank studies that addressed important criteria-level variables. Based on definitional differences between 1990 and 2010/2011 criteria, we interpreted 85% sensitivity and 90% specificity as excellent agreement.

RESULTS

Against 1990 and clinical criteria, the median sensitivity and specificity of the 2010/2011 criteria were 86% and 90%, respectively. The 2010/2011 criteria led to misclassification when applied to regional pain syndromes, but when a modified widespread pain criterion (the "generalized pain criterion") was added misclassification was eliminated. Based on the above data and clinic usage data, we developed a (2016) revision to the 2010/2011 fibromyalgia criteria. Fibromyalgia may now be diagnosed in adults when all of the following criteria are met: CONCLUSIONS: The fibromyalgia criteria have good sensitivity and specificity. This revision combines physician and questionnaire criteria, minimizes misclassification of regional pain disorders, and eliminates the previously confusing recommendation regarding diagnostic exclusions. The physician-based criteria are valid for individual patient diagnosis. The self-report version of the criteria is not valid for clinical diagnosis in individual patients but is valid for research studies. These changes allow the criteria to function as diagnostic criteria, while still being useful for classification.

Fibromyalgia: A Critical and Comprehensive Review

Fibromyalgia is a disorder that is part of a spectrum of syndromes that lack precise classification. It is often considered as part of the global overview of functional somatic syndromes that are otherwise medically unexplained or part of a somatization disorder. Patients with fibromyalgia share symptoms with other functional somatic problems, including issues of myalgias, arthralgias, fatigue and sleep disturbances. Indeed, there is often diagnostic and classification overlap for the case definitions of a variety of somatization disorders. Fibromyalgia, however, is a critically important syndrome for physicians and scientists to be aware of. Patients should be taken very seriously and provided optimal care. Although inflammatory, infectious, and autoimmune disorders have all been ascribed to be etiological events in the development of fibromyalgia, there is very little data to support such a thesis. Many of these disorders are associated with depression and anxiety and may even be part of what has been sometimes called affected spectrum disorders. There is no evidence that physical trauma, i.e., automobile accidents, is associated with the development or exacerbation of fibromyalgia. Treatment should be placed on education, patient support, physical therapy, nutrition, and exercise, including the use of drugs that are approved for the treatment of fibromyalgia. Treatment should not include opiates and patients should not become poly pharmacies in which the treatment itself can lead to significant morbidities. Patients with fibromyalgia are living and not dying of this disorder and positive outlooks and family support are key elements in the management of patients.

Serum Vitamin D Status in Iranian Fibromyalgia Patients: according to the Symptom Severity and Illness Invalidation

Background

This study was designed to assess serum vitamin D status (25-OHD) in the fibromyalgia (FM) patients and to compare it with a healthy control group. It also aimed to investigate the correlation of serum vitamin D level with FM symptom severity and invalidation experiences.

Methods

A total of 74 consecutive patients with FM and 68 healthy control participants were enrolled. The eligible FM patients completed the Illness Invalidation Inventory (3^*I), the Revised Fibromyalgia Impact Questionnaire (FIQR) and a short-form health survey (SF-12). Venous blood samples were drawn from all participants to evaluate serum 25-OHD levels. Mann-Whitney tests and multiple logistic regression analyses were performed and Spearman's correlations were calculated.

Results

88.4% of FM patients had low levels of serum 25-OHD. FM patients had significantly higher level of serum 25-OHD than the control group (17.24 ± 13.50 and 9.91 ± 6.47 respectively, P = 0.0001). There were no significant correlations between serum 25-OHD levels and the clinical measures of disease impact, invalidation dimensions, and health status. Multiple logistic regression analyses revealed that an increased discounting of the disease by the patient's spouse was associated with a 4-fold increased risk for vitamin D deficiency (OR = 4.36; 95% CI, 0.95–19.87, P = 0.05).

Conclusions

This study showed that although high rates of vitamin D insufficiency or deficiency were seen among FM patients and healthy non-FM participants, but it seems there was no intrinsic association between FM and vitamin D deficiency. Addressing of invalidation experience especially by the patient's spouse is important in management of FM.

2010 American College of Rheumatology Adult Fibromyalgia Criteria for Use in an Adolescent Female Population with Juvenile Fibromyalgia

OBJECTIVES

To evaluate the utility of the 2010 American College of Rheumatology (ACR) adult fibromyalgia criteria for use in adolescents with juvenile fibromyalgia (JFM).

STUDY DESIGN

Participants included 47 adolescent girls diagnosed with JFM (mean age = 15.3 years) and 48 age- and sex-matched adolescents (mean age = 15.0 years) with localized chronic pain (eg, headaches or abdominal pain). A trained examiner administered the Widespread Pain Index and Symptom Severity measures and also completed a manual tender point exam. Clinicians completed a form indicating the presence of active JFM per Yunus and Masi (1985) criteria, the only available and most commonly used measure for JFM. Criterion validity analysis was performed as well as t tests comparing symptoms between JFM and controls.

RESULTS

With the Yunus and Masi criteria used as the gold standard, the 2010 ACR fibromyalgia criteria showed a sensitivity of 89.4% and specificity of 87.5%.

CONCLUSION

The 2010 ACR measure appears to be a valuable tool for the identification of JFM. However, a slight modification to the 2010 ACR measure and inclusion of a clinical exam is recommended.

The Discriminatory Ability of the Fibromyalgia Rapid Screening Tool (FiRST): An International Study in Spain and Four Latin American Countries

OBJECTIVE

To assess the transcultural equivalency of the Spanish version of the Fibromyalgia Rapid Screening Tool (FiRST) and its discriminatory ability in different Latin American samples.

DESIGN

Validation study.

SETTING

Departments of Rheumatology in general hospitals and private centers; fibromyalgia unit in a university hospital.

SUBJECTS

350 chronic pain patients from Spain, Argentina, Mexico, Peru, and Ecuador.

METHODS

The cultural relevance of the Spanish version of the FiRST was evaluated. The ability of the FiRST as a screening tool for fibromyalgia was assessed by logistic regression analysis. To determine the degree to which potential confounders, such as differences in demographics, pain, affective distress, catastrophizing, and disability, might affect the discriminatory ability, the tool was reassessed by hierarchical multivariate logistic regression.

RESULTS

Slightly different versions of the FiRST were recommended for use in each Latin American subsample. The FiRST showed acceptable criterion validity and was able to discriminate between fibromyalgia and non-fibromyalgia patients even after controlling for the effect of potential confounders. However, low specificities were observed in samples from Spain and Mexico.

CONCLUSIONS

The Spanish version of the FiRST may be used as a screening tool for fibromyalgia in several Latin American subsamples, even in those patients with high scores on potential confounders. In Spain and Mexico, the low specificity of the FiRST suggests, however, that it would be best used to support a suspected diagnosis of fibromyalgia, rather than to exclude the diagnosis.

Validation of fibromyalgia survey questionnaire and polysymptomatic distress scale in a Persian population

The aim of this study was to assess validity of the fibromyalgia survey questionnaire (FSQ) and polysymptomatic distress scale (PSD) in an Iranian population. We also sought to classify the severity levels of fibromyalgia (FM) symptoms according to the PSD scale. Participants were divided into FM and non-FM chronic pain disorder groups according to expert physician diagnosis. Patients in both groups answered to Persian-translated version of FSQ, fibromyalgia impact questionnaire (FIQ) and Short-Form-12 (SF-12). Both 1990 ACR criteria and FSDC were assessed in participates of two groups. Internal consistency and construct validity were evaluated. There was good internal consistency measured by Cronbach's alpha (0.814 for FSQ). FSQ and its subscales correlated significantly with FIQ scores and SF-12 subscales, indicating acceptable construct validity. The concordance rates of FSQ with 1990 ACR criteria and expert diagnosis were 61.2 and 75.7, respectively (convergence validity). The mean score of PSD and its components in FM group were significantly more than in control groups (discriminative validity). Using lower PSD score cutoff (≥8.5) for the diagnosis of fibromyalgia appeared to be the most effective approach in our population. ROC analysis of the PSD scores revealed 8.5-11.5, 11.5-15 and more than 15, respectively, as a mild, moderate and severe FM. Persian version of FSQ was a valid instrument for application in survey research among Iranian patients with chronic pain disorders. The current study revealed that PSD could be used as a valid tool for assessment of symptoms intensity regardless of fibromyalgia diagnosis.

Are general practitioners well informed about fibromyalgia?

AIM

Fibromyalgia syndrome (FMS) is a common rheumatologic disorder characterized by easy fatigability, widespread musculoskeletal pain and sleep disorder. In spite of its high prevalence, general practitioners, as primary care providers, seem to have inadequate knowledge about FMS. This study aimed to assess Iranian general practitioners' knowledge about FMS and its treatment.

METHOD

A detailed questionnaire (including items on signs and symptoms, diagnostic criteria and treatment) was completed by 190 general practitioners (54.7% male; mean age: 41 years). Data analysis was performed with SPSS for Windows 15.0 and awareness about all aspects of FMS was reported as percentages.

RESULTS

About one-third (30%) of the participants had seen at least one case of FMS during their practice. Most subjects (62.7%) claimed to know 1-6 tender points. Only 3.2% knew 16-18 points. The common proposed symptoms of FMS were widespread pain (72.6%), excessive fatigue (72.6%), weakness (60.5%), sleep disorder (36.3%), anxiety (34.7%) and depression (34.2%). Wrong symptoms including elevated erythrocyte sedimentation rate and C-reactive protein, arthritis, joint swelling, weight loss and abnormal radiologic findings were selected by 27.9%, 18.9%, 14.7%, 12.6% and 2.1% of the physicians, respectively. Moreover, selective serotonin reuptake inhibitors, tricyclic antidepressant and pregabalin were identified as treatment options for FMS by, respectively, 45.8%, 22.1% and 15.3% of the participants. Finally, 52.1% and 23.7% of the subjects incorrectly considered nonsteroidal anti-inflammatory drugs and corticosteroids as treatment modalities for FMS.

CONCLUSION

Iranian general practitioners are not well informed about FMS. Therefore, FMS should be specifically integrated in continuing medical education programs and undergraduate medical training curriculum.

The Iceberg Nature of Fibromyalgia Burden: The Clinical and Economic Aspects

This review has focused on important but less visible aspects of fibromyalgia (FM) with respect to the high impact of this disorder on patients and societies. FM is a common but challengeable illness. It is characterized by chronic widespread pain, which can be accompanied by other symptoms including fatigue, sleep disturbances, cognitive dysfunction, anxiety and depressive episodes. While our understanding of this debilitating disorder is limited, diagnosis and treatment of this condition is very difficult, even in the hands of experts. Due to the nature of disease, where patients experience invalidation by medical services, their families and societies regarding the recognition and management of disease, direct, indirect and immeasurable costs are considerable. These clinical and economic costs are comparable with other common diseases, such as diabetes, hypertension and osteoarthritis, but the latter usually receives much more attention from healthcare and non-healthcare resources. Present alarming data shows the grave and "iceberg-like" burden of FM despite the benign appearance of this disorder and highlights the urgent need both for greater awareness of the disease among medical services and societies, as well as for more research focused on easily used diagnostic methods and target specific treatment.