Abnormalities in cognitive-emotional information processing in idiopathic environmental intolerance and somatoform disorders

The regulatory role of affective inhibitory control in somatic symptoms among adolescents exposed to child maltreatment: a population-based study

Adolescents exposed to child maltreatment are at increased risk for various somatic symptoms, but which psychological factors that contribute to this relationship need to be further investigated. Emotion dysregulation is suggested to serve as a proximal link between child maltreatment and somatic complaints. The purpose of the present study was to investigate whether individual differences in affective inhibitory control, a central component in implicit emotion regulation, contribute to the risk of somatic symptoms in adolescents exposed to child maltreatment. Data were drawn from the UEVO study, a national population-based survey of adolescents between 12 and 16 years of age (N = 9240). For this study, we included participants who completed the emotional go/no-go task measuring affective inhibitory control (N = 7241; Mage/SD = 14 years/.87; 52% girls, 47% boys), of which N = 3349 reported at least one incident of maltreatment exposure (57% girls, 41% boys). Exposure to psychological abuse and sexual abuse were associated with somatic symptoms. Affective inhibitory control was related to somatic symptoms, both in the total sample and in adolescents exposed to child maltreatment. The strength of relationships between exposure to psychological abuse and somatic symptoms, as well as sexual abuse and somatic symptoms, were moderated by individual differences in affective inhibitory control problems. Our study suggests that psychological abuse and sexual abuse increase the risk for somatic symptoms in adolescence. Affective inhibitory control, a central component in implicit emotion regulation, was related to somatic symptoms and moderated the relationships between psychological abuse and somatic symptoms, and sexual abuse and somatic symptoms. Revealing these associations in a population-based sample indicates that treatment targeting affective inhibitory control may be beneficial and should be explored further in clinical settings.

Emotion regulation in patients with somatic symptom and related disorders: A systematic review

Background

Somatic symptoms and related disorders (SSD) are prevalent phenomena in the health-care system. Disturbances in emotion regulation (ER) are commonly observed in patients suffering from SSD.

Objectives

This review aimed to examine ER processes that characterize SSD by a systematic analysis of the available empirical studies.

Data sources

PsycINFO and PubMed databases for the articles published between January 1985 and June 2018.

Search terms

“emotion/al regulation” or “affect regulation” and various forms of SSD.

Study eligibility criteria

Empirical studies that a) assigned adolescent or adult patients suffering from SSD based on a clinical diagnosis, and b) examined the relationship between ER and SSD, were included.

Study synthesis methods

A tabular summary of the articles was generated according to study characteristics, study quality, variables, and findings. The findings were organized based on ER variables used in the articles and diagnoses of SSD, which were then re-organized under the main constituents of ER (attention, body, and knowledge).

Results

The findings of the 64 articles largely supported the association between SSD and disturbances in ER, which are usually shared by different diagnoses of SSD. The results indicate that patients show a reduced engagement with cognitive content of emotions. On the other hand, bodily constituents of ER seem to depict an over-reactive pattern. Similarly, the patients tend to encounter difficulties in flexibly disengaging their (spontaneous) attention from emotional material.

Limitations

There is a scarcity of longitudinal designs, randomized controlled trials, experiments, and diary studies suited to investigate the short- and long-term causal relationship between ER and SSD. Symptoms of SSD and measures to assess emotion regulation are heterogeneous.

Conclusions and implications

Assessment of ER processes is potentially useful to understand SSD and for treatment planning. Furthermore, a concurrent investigation of the dynamic interaction of the ER modalities promises insights for better understanding of the role of ER in development, course, and maintenance of SSD.

Risks perception of electromagnetic fields in Taiwan: the influence of psychopathology and the degree of sensitivity to electromagnetic fields

Little is known about the perceived health risks of electromagnetic fields (EMFs) and factors associated with risk perception in non-Western countries. Psychological conditions and risk perception have been postulated as factors that facilitate the attribution of health complaints to environmental factors. This study investigated people's perceived risks of EMFs and other environmental sources, as well as the relationships between risk perception, psychopathology, and the degree of self-reported sensitivity to EMFs. A total of 1,251 adults selected from a nationwide telephone interviewing system database responded to a telephone survey about the relationships between environmental sources and human health. The interview included questions assessing participants' psychiatric conditions and the presence and degree of sensitivity to EMFs. One hundred and seventy participants were self-identified as having sensitivity to EMFs, and 141 met the criteria for psychiatric conditions without EMF sensitivity. More than half of the survey respondents considered power lines and mobile phone base stations to affect people's health to a big extent. Higher sensitivity to EMFs, psychopathology, being female, being married, more years of education, and having a catastrophic illness had positive associations with perceived risks of EMF-related environmental sources as well as for all environmental sources combined. We observed no moderating effect of psychopathology on the association between degree of sensitivity to EMF and risk perception. Thus, psychopathology had influence on general people's risk perception without having influence on the relationship between people's degree of sensitivity to EMF and risk perception. The plausible explanations are discussed in the text.

Memory bias for emotional and illness-related words in patients with depression, anxiety and somatization disorders: an investigation with the directed forgetting task

OBJECTIVE

Memory bias to emotion- and illness-related information plays a prominent role in many mental disorders, particularly major depressive disorder, anxiety disorders and somatoform disorder. The current study aimed to investigate memory bias in different mental disorders by using neutral, emotionally valenced and illness-related word stimuli in a directed forgetting task.

METHODS

Seventy-eight inpatients from a university-based psychosomatic hospital participated in the study. The item method of the directed forgetting task was used, in which participants are instructed to either forget or remember each item immediately after it has been presented. Memory performance was tested with a free recall test. Overall, 36 words were presented - 6 from each of 6 categories: neutral, negative, positive, illness related ('somatoform'), depression related, and anxiety related. Three words of each category were to be remembered and 3 were to be forgotten.

RESULTS

Independently of the patients' diagnoses, we found that most patients had relative difficulties remembering anxiety- and depression-related words, compared to neutral words, when they were instructed to remember them. By contrast, in the 'instructed forgetting' condition, patients showed deficits in the ability to forget illness-related stimuli relative to neutral material. These effects were unspecific with regard to diagnosis.

CONCLUSIONS

The results in the 'instructed remembering' condition might be interpreted in the context of cognitive avoidance instead of a memory bias. In the 'instructed forgetting' condition, it appeared that illness-related words were more difficult to suppress compared to the other word types, which could explain the observed memory bias.

Predictive validity and clinical utility of DSM-5 Somatic Symptom Disorder--comparison with DSM-IV somatoform disorders and additional criteria for consideration

OBJECTIVE

Major changes to the diagnostic category of somatoform disorders are being proposed for DSM-5. The effect of e.g. the inclusion of psychological criteria (criterion B) on prevalence, predictive validity, and clinical utility of "Somatic Symptom Disorder" (SSD) remains unclear. A prospective study was conducted to compare current and new diagnostic approaches.

METHODS

In a sample of N=456 psychosomatic inpatients (61% female, mean age=44.8±10.4 years) diagnosed with somatoform, depressive and anxiety disorders, we investigated the current DSM-5 proposal (SSD) plus potential psychological criteria, somatic symptom severity, and health-related quality of life at admission and discharge.

RESULTS

N=259 patients were diagnosed with DSM-IV somatoform disorder (56.8%). With a threshold of 6 on the Whiteley Index to assess psychological criteria, the diagnosis of SSD was similarly frequent (51.8%, N=230). However, SSD was a more frequent diagnosis when we employed the recommended threshold of one subcriterion of criterion B. Patients diagnosed with only SSD but not with DSM-IV somatoform disorder showed greater psychological impairment. Both diagnoses similarly predicted physical functioning at discharge. Bodily weakness and somatic and psychological attributions at admission were among significant predictors of physical functioning at discharge. Reduction of health anxiety, bodily weakness, and body scanning significantly predicted an improvement of physical functioning.

CONCLUSIONS

Psychological symptoms enhance predictive validity and clinical utility of DSM-5 Somatic Symptom Disorder compared to DSM-IV somatoform disorders. The SSD diagnosis identifies more psychologically impaired patients than its DSM-IV precursor. The currently suggested diagnostic threshold for criterion B might increase the disorder's prevalence.

Factors associated with prospective development of environmental annoyance

OBJECTIVES

Idiopathic environmental intolerance (IEI) has in cross-sectional studies been associated with emotional problems and psychiatric disorders. However, in the absence of prospective studies it has not been possible to determine whether emotional problems precede the onset of IEI, or are a consequence of IEI. The purpose of this study was to address this issue in a prospective panel study design.

METHODS

The study sample (n=10 275) responded to a postal survey that included five questions regarding annoyance from environmental factors, at baseline and at follow-up five years later. Associations between a number of self-rating scales of stress, subjective health, and working conditions at baseline on one hand, and development of environmental annoyance from baseline to follow-up on the other, were examined.

RESULTS

Participants having developed environmental annoyance between baseline and follow-up had at baseline reported more subjective health complaints, higher levels of stress, strain, and lack of recovery, more dissatisfaction with their work situation, and lower personal social support, compared to participants not developing environmental annoyance.

CONCLUSION

Elevated subjective health complaints, high stress in daily life and a strained work situation, all possible signs of sustained arousal, increase the risk of developing annoyance to environmental factors. The results fit the hypothesis that reduced subjective health, over the course of time, may be attributed to environmental factors.

Towards positive diagnostic criteria: a systematic review of somatoform disorder diagnoses and suggestions for future classification

OBJECTIVES

The classification of somatoform disorders is currently being revised in order to improve its validity for the DSM-V and ICD-11. In this article, we compare the validity and clinical utility of current and several new diagnostic proposals of those somatoform disorders that focus on medically unexplained somatic symptoms.

METHODS

We searched the Medline, PsycInfo, and Cochrane databases, as well as relevant reference lists. We included review papers and original articles on the subject of somatoform classification in general, subtypes of validity of the diagnoses, or single diagnostic criteria.

RESULTS

Of all diagnostic proposals, only complex somatic symptom disorder and the Conceptual Issues in Somatoform and Similar Disorders (CISSD) example criteria reflect all dimensions of current biopsychosocial models of somatization (construct validity) and go beyond somatic symptom counts by including psychological and behavioral symptoms that are specific to somatization (descriptive validity). Predictive validity of most of the diagnostic proposals has not yet been investigated. However, the number of somatic symptoms has been found to be a strong predictor of disability. Some evidence indicates that psychological symptoms can predict disease course and treatment outcome (e.g., therapeutic modification of catastrophizing is associated with positive outcome). Lengthy symptom lists, the requirement of lifetime symptom report (as in abridged somatization), complicated symptom patterns (as in current somatization disorder), and imprecise definitions of diagnostic procedures (e.g., missing symptom threshold in complex somatic symptom disorder) reduce clinical utility.

CONCLUSION

Results from the reviewed studies suggest that, of all current and new diagnostic suggestions, complex somatic symptom disorder and the CISSD definition appear to have advantages regarding validity and clinical utility. The integration of psychological and behavioral criteria could enhance construct and descriptive validity, and confers prospectively relevant treatment implications. The incorporation of a dimensional approach that reflects both somatic and psychological symptom severity also has the potential to improve predictive validity and clinical utility.

Attention to bodily sensations and symptom perception in individuals with idiopathic environmental intolerance

INTRODUCTION

Idiopathic environmental intolerance (IEI) is characterized by non-specific symptoms attributed to exposure to environmental odours or chemicals at levels below those known to induce adverse health effects. A clarification of whether psychological processes involved in sensory perceptions are associated with IEI would add to our understanding of this complex disorder.

PURPOSE

To examine if measures of somato-sensory amplification, autonomic perception and absorption are associated with IEI.

METHODS

The study included individuals with self-reported or physician-diagnosed IEI. Participants (n = 732) completed questionnaires that included items on descriptive variables of IEI, the Somato-Sensory Amplification Scale (SSAS), the Autonomic Perception Questionnaire (APQ), the Tellegen Absorption Scale (TAS) and a Negative Affectivity Scale (NAS).

RESULTS

Multiple, hierarchical linear regression analyses revealed significant positive associations between SSAS, APQ, and IEI, while small and inverse associations were seen between TAS and IEI.

CONCLUSIONS

The association with SSAS and APQ suggests that perceptual personality characteristics are important in understanding this disorder.