Schmerzbezogene Beeinträchtigung bei Jugendlichen mit chronischen Schmerzen

Longitudinal examination of associations with the onset of pediatric chronic pain at different pain locations

ABSTRACT

Chronic pain is a frequent phenomenon in pediatrics. Little research explores whether there are factors that uniquely predict or accompany the onset of new chronic pain in different locations of the body. In this study, we report pediatric pain data for 3 location subsamples-headache, abdominal pain, and musculoskeletal pain-of a large secondary school sample (N = 2280). We distinguished between participants who experienced an onset of chronic pain and participants who had no chronic pain at the respective pain location within a 1-year period. We used regression and multilevel models to compare the 2 groups regarding factors previously associated with chronic pain. Our results indicate that irrespective of location, the onset of chronic pain is predicted by psychosocial factors, in particular, symptoms of depression (odds ratio [OR] = 1.13-1.17, P < 0.01) and anxiety (OR = 1.12-1.21, P < 0.05). Although the onset of headache is predicted by psychosocial factors only, the onsets of abdominal and musculoskeletal pain are additionally predicted by physiological factors such as level of physical activity. Many of the predictors were also accompanying factors. Regarding chronic abdominal pain, sleep deficiency did not predict pain onset but was a co-occurring phenomenon. Our findings underline the importance of mental health factors in the pain onset at all 3 body locations, whereas in chronic abdominal and musculoskeletal pain, physiological factors should also be considered. Measures of model fit, however, indicate that the occurrence of chronic pain is more complex and not well predicted by these factors alone.

Risk of Unfavorable Trajectories of Chronic Pain Severity-Results of a Longitudinal Study in School Children

Chronic pain is a common burden among children and adolescents associated with impairments in many aspects of life. Higher pain severity increases this burden. Subsequently, it is important to identify factors predicting the course of pain severity, classified by the chronic pain grading (CPG). In a 1-year longitudinal assessment of a general school-age population (N = 2,280), we aimed to identify biopsychosocial factors associated with CPG trajectories. We focused on children and adolescents who reported chronic pain at the start of the year (N = 689). Using longitudinal latent class analysis, we identified 3 classes of CPG trajectories over 1 year: 1) the "pain recovery group" exhibited initially moderate CPG scores that rapidly and consistently declined to a pain-free level, 2) the "continuously moderate pain severity group" displayed initially high CPG levels with a mild decline over time, and 3) the "continuously low pain severity group" had initially moderate CPG levels, which only slightly declined. In comparison to the pain recovery group, the continuously moderate pain severity group presented with heightened levels of anxiety (odds ratio [OR] = 1.12, 95% confidence interval [CI] [1.02, 1.24], P = .023), depression (OR = 1.10, 95% CI [1.01, 1.19], P = .029), and affective pain perception (OR = 1.10, 95% CI [1.02, 1.18], P = .010) and were more likely to be female (OR = 2.14, 95% CI [1.05, 4.35], P = .036). The continuously low pain severity group was predominantly female (OR = 1.65, 95% CI [1.10, 2.49], P = .016) compared to the pain recovery group. In conclusion, girls and individuals with impaired psychological well-being more often exhibit unfavorable trajectories of chronic pain severity. PERSPECTIVE: Pediatric chronic pain patients, particularly females and those exhibiting elevated anxiety or depression scores or heightened affective pain perception warrant special attention in health care. These individuals have a greater risk of an unfavorable trajectory of chronic pain severity and might need more urgent and specialized treatment.

Pediatric chronic pain grading-a revised classification of the severity of pediatric chronic pain

ABSTRACT

In this study, we describe the development and validation of a revised Pediatric Chronic Pain Grading (P-CPG) for children aged 8 to 17 years that adds emotional impairment to previously used measures of pain intensity and functional impairment. Such a measure enables the assessment of chronic pain severity in different epidemiological and clinical populations, the stratification of treatment according to pain severity, and the monitoring of treatment outcome. The P-CPG was developed using a representative sample of school children with chronic pain (n = 454; Mage = 12.95, SD = 2.22). Construct validity and sensitivity to change were examined within a sample of N = 2448 children and adolescents (Mage = 12.71, SD = 2.47) comprising 3 subsamples (school n = 1562, primary care n = 129, and tertiary care n = 757) affected by chronic pain to varying extents. Results showed that P-CPG grades differed significantly among the 3 subsamples, with school children being least affected by chronic pain and tertiary care patients being most affected. As P-CPG grade increased, so did pain intensity, functional impairment, pain-related school absence, and emotional impairment. Convergent validity was demonstrated by significant positive correlations between the P-CPG and global ratings of pain severity as well as objective claims data; the latter reflects greater health care costs with increasing P-CPG scores. Sensitivity to change was supported by a significant reduction in baseline P-CPG grades 3 and 6 months after intensive interdisciplinary pain treatment in tertiary care sample. In conclusion, the P-CPG is an appropriate measure of pain severity in children and adolescents with chronic pain in clinical as well as epidemiological settings.

[Gender-specific results of the Dresden children and adolescents headache program DreKiP]

BACKGROUND

Girls and women are more frequently affected by headache than boys and men. The influence of gender on the effectiveness of headache therapies has so far been hardly investigated. We examined gender differences in the outpatient multimodal Dresden Child and Adolescent Headache Program DreKiP.

METHODS

We treated 140 patients with primary headache in a 15-hour structured group program. At baseline (T0) and six (T1) and twelve months (T2) after the end of the program, data on headache-related limitation of daily activities (PedMIDAS) as well as headache frequency, intensity, and pain-related disability (P-PDI) were collected. Retrospectively, these data were analyzed separately for girls and boys.

RESULTS

For 91 patients (9-19 years, median = 15; 71.4 % female) data were available for at least two measurement time points. Girls showed significantly higher headache frequency than boys at all time points (median headache days/last three months at T0: ♀ 43, ♂ 20; T1: ♀ 32, ♂ 12; T2: ♀ 28, ♂ 9) as well as numerically higher headache-related limitation of daily life. There were significant effects over time with a decrease in headache frequency (F (2.88) = 5.862; p = 0.004) and improvement in daily functioning (F (2.92) = 5.340; p = 0.006). There was no gender-specific treatment response.

DISCUSSION

The DreKiP therapy shows effects in girls and boys with primary headache. Higher headache frequencies and everyday life restrictions in girls may have hormonal but also psychosocial causes and should be addressed in educational measures.

"The mere imagination scares me"-evidence for fear responses during mental imagery of pain-associated interoceptive sensations in adolescents with chronic pain

ABSTRACT

According to the bio-informational theory of emotion by Lang, mental imagery of fearful stimuli activates physiological and behavioural response systems, even in the absence of sensory input. We investigated whether instructed mental imagery of pain-associated (not painful) interoceptive sensations entails a threat value and elicits increased startle response, skin conductance level (SCL), and heart rate (HR) indicative of defensive mobilization in adolescents with chronic pain. Additionally, self-reported measures (fear, fear of pain, desire to avoid) were assessed. Adolescents (11-18 years) with chronic headache (CH, n = 46) or chronic abdominal pain (CAP, n = 29) and a control group (n = 28) were asked to imagine individualized pain-associated, neutral and standardized fear scripts. During pain-associated compared with neutral imagery, both pain groups showed higher mean HR, with CH also showing higher HR reactivity, while HR acceleration was not observed within control group. In contrast, during pain-associated compared with neutral imagery, startle response magnitude and SCL remained unchanged in all groups. Additionally, overall levels in self-reports were higher during pain-associated compared with neutral imagery, but significantly more pronounced in the pain groups compared with the control group. Results suggest that the mere imagination of pain-associated sensations elicits specific autonomic fear responses accompanied by increased self-reported fear in adolescents with chronic pain. The specific modulation of heart rate shed new light on our understanding of multimodal fear responses in adolescents with chronic pain and may help to refine paradigms to decrease fear of interoceptive sensations in chronic pain.

Predictors and concomitants of the remission of frequent headache in pediatrics: A longitudinal community study

OBJECTIVE

We aimed to examine factors associated with frequent headache remission in schoolchildren aged 10-18 years.

BACKGROUND

Frequent headache is a common health problem in adolescence, and some individuals in this population experience remission. Factors preceding headache remission as opposed to ongoing headache, and their development over time, have not been examined extensively.

METHODS

Data were derived from a large school sample (N = 2280). Over the course of 1 year, n = 156 adolescents experienced remission from frequent headaches, while n = 125 adolescents continued to have frequent headaches throughout the year. In this longitudinal case-control study, we predicted headache remission using demographic, pain, psychosocial, sleep, and physiological characteristics. Additionally, we sought to explore the development of psychosocial, sleep, and physiological characteristics in relation to remitted versus ongoing headache over the 1-year period.

RESULTS

A model containing the variables sex (odds ratio [OR] = 0.43, 95% confidence interval [CI] = 0.248-0.76, p = 0.003), headache intensity (OR = 0.85, 95% CI = 0.73-0.99, p = 0.035), anxiety score (OR = 0.92, 95% CI = 0.85-1.01, p = 0.071), and depression score (OR = 0.94, 95% CI = 0.89-1.00, p = 0.041) predicted the outcome variable (remitted vs. non-remitted headache), explaining 17% of the variance in group membership. Schoolchildren reporting remitted headache at the end of the year exhibited lower depression (F[1, 557.01] = 45.77, p < 0.001) and anxiety scores (F[1, 557.01] = 21.72, p < 0.001), higher school satisfaction (F[1, 209.46] = 7.15, p = 0.008), and fewer difficulties falling asleep (F[1, 856.52] = 41.21, p < 0.001) or sleeping through the night (F[1, 731.12] = 26.42, p < 0.001) throughout the year compared to those with non-remitted headache. Depression scores declined significantly over the year in the group with remitted headache, whereas these scores remained constant in the group with non-remitted headache.

CONCLUSION

Our results suggest a correlation between headache remission and male sex, improved mental health, and reduced pain-related burden. Moreover, there was an observed decline in symptoms of depression during headache remission. Psychotherapy may be a promising treatment strategy for addressing frequent headaches reported by children and adolescents.

Development and Validation of the Scale for Pain Self-Efficacy (SPaSE) in German and English Languages for Children and Adolescents

No validated measure for pain self-efficacy in children and adolescents is currently available in the German language, and existing English versions have limitations. This study used a thorough development process to create the Scale for Pain Self-Efficacy (SPaSE) in both German and English languages. Scale development was based on self-efficacy theory, adapting items from existing self-efficacy measures, and review of patients' perspectives. The final version of the 11-item SPaSE was created with expert discussions and testing of content validity, comprehensibility, and construct validity. The validation process consisted of exploratory factor analysis, testing of item characteristics, internal consistency, and sensitivity to change in 2 German samples of children and adolescents with chronic pain (study 1: outpatient sample N = 150, inpatient sample N = 31). Cross-validation in a U.S. sample (study 2: N = 98) confirmed the 1-factor structure, the sound psychometric properties and reliability of the SPaSE. Sum scores of the SPaSE were negatively correlated with pain-related disability, pain intensity, passive pain coping strategies, and emotional distress, in line with previous research. The valid and reliable SPaSE can be used in clinical practice to monitor pain treatment progress, advances the field of pain self-efficacy research in Germany, and opens the door to comparative research in German and English samples. PERSPECTIVE: This article presents psychometric properties of a newly developed measure of pain self-efficacy in children and adolescents that is available in both German and English language. This measure could be used in both research and clinical practice to measure treatment progress and outcome.

Olfactory training reduces pain sensitivity in children and adolescents with primary headaches

Objective

Headache prevalence among children and adolescents has increased over the last few years. Evidence-based treatment options for pediatric headaches remain limited. Research suggests a positive influence of odors on pain and mood. We investigated the effect of repeated exposure to odors on pain perception, headache-related disability, and olfactory function in children and adolescents with primary headaches.

Methods

Eighty patients with migraine or tension-type headache (mean 13.1 ± 3.29 years) participated, of whom 40 underwent daily olfactory training with individually selected pleasant odors for 3 months and 40 received state-of-the-art outpatient therapy as a control group. At baseline and after a 3-month follow-up, olfactory function [odor threshold; odor discrimination; odor identification; comprehensive Threshold, Discrimination, Identification (TDI) score], mechanical detection and pain threshold (quantitative sensory testing), electrical pain threshold, patient-reported outcomes on headache-related disability [Pediatric Migraine Disability Assessment (PedMIDAS)], pain disability [Pediatric Pain Disability Index (P-PDI)], and headache frequency were assessed.

Results

Training with odors significantly increased the electrical pain threshold compared to the control group (U = 470.000; z = -3.177; p = 0.001). Additionally, olfactory training significantly increased the olfactory function (TDI score [t(39) = -2.851; p = 0.007], in particular, olfactory threshold, compared to controls (U = 530.500; z = -2.647; p = 0.008). Headache frequency, PedMIDAS, and P-PDI decreased significantly in both groups without a group difference.

Conclusions

Exposure to odors has a positive effect on olfactory function and pain threshold in children and adolescents with primary headaches. Increased electrical pain thresholds might reduce sensitization for pain in patients with frequent headaches. The additional favorable effect on headache disability without relevant side effects underlines the potential of olfactory training as valuable nonpharmacological therapy in pediatric headaches.

Intensive interdisciplinary pain treatment for children and adolescents with chronic noncancer pain: a preregistered systematic review and individual patient data meta-analysis

ABSTRACT

Chronic noncancer pain in children and adolescents can be impairing and results in substantial health care costs. Intensive interdisciplinary pain treatment (IIPT), an inpatient or day hospital treatment delivered by a team of 3 or more health professionals, may be an effective intervention for these children and adolescents. Based on previous reviews and meta-analyses, we updated findings regarding the description of available treatments and estimated the effectiveness of IIPT, overcoming methodological shortcomings of previous work by requesting and analyzing individual participant data. On June 26, 2021, we searched 5 literature databases (PubMed, PsycINFO, Web of Science, Cochrane Library, and PubPsych) for studies examining the effectiveness of IIPT. Included studies used a pre-post design, assessed patients younger than 22 years, and presented their results in English, German, French, or Spanish. We used standard methodological procedures expected by Cochrane to pool treatment effects and assess risk of bias. We identified 13 different treatment sites with similar treatment inclusion criteria and treatment components, but the descriptions of those treatments varied widely. Regarding treatment effectiveness, IIPT may result in large improvements in the mean pain intensity ( g = -1.28), disability ( g = -1.91), and number of missed school days at the 12-month follow-up ( g = -0.99), as well as moderate improvements in anxiety ( g = -0.77) and depression ( g = -0.76). The certainty of the evidence, however, was graded from very low to low. We recommend that future researchers use more scientific rigor to increase the certainty of the evidence for IIPT and standardize treatment outcomes for children and adolescents with chronic pain.

Functional improvement in children and adolescents with primary headache after an interdisciplinary multimodal therapy program: the DreKiP study

BACKGROUND

More than 2/3 of children and adolescents in Germany regularly suffer from headaches. Headache-related limitations in everyday life, school drop-out and educational impairment are common. Structured therapy programs for young headache patients are widely missing.

METHODS

One hundred eleven patients with frequent migraine and/or tension type headache were treated in a 15 hour group program in afternoons, parallel with school, parents received 7 hours of therapy. At the beginning of the program (T0), 6 (T1) and 12 months (T2) after completion, data on headache related disability (PedMidas), headache frequency, intensity, and pediatric pain disability score (PPDI) were prospectively collected to investigate the effects of the therapy.

RESULTS

Seventy-five patients (9-19 years, median = 14; 66.7% female) and their parents provided patient reported outcome measures showing at T1 (65 patients) and T2 (47 patients) reduced headache frequency (last 3 months headache days median T0: 30 days; T1: 18 days, reduction of median 12 days since T0; T2: 13 days, reduction of median 17 days since T0). Linear mixed models revealed significant reduction (T0/T1 p = 0,002; T0/T2 p = 0,001). Reduced headache disability has been reported at T1 and T2 (PedMidas median T0 = 30, T1 = 15, T2 = 7; p < 0,001, p < 0,001 respectively). Follow up data of a subgroup of patients 24 months after the treatment point to sustainable effects.

CONCLUSIONS

The interdisciplinary multimodal headache therapy program DreKiP reduces headache frequency and headache related disability significantly 6-12 months following its completion.

TRIAL REGISTRATION

DRKS00027523, retrospectively registered.

A randomized controlled trial on long-term effectiveness of a psychosocial aftercare program following pediatric chronic pain treatment: Who benefits the most?

BACKGROUND

For pediatric chronic pain patients, intensive interdisciplinary pain treatment (IIPT) is a well-established treatment. The treatment's short-term effectiveness can be improved by an additive psychosocial aftercare (PAC). However, neither the program's long-term effectiveness nor the patients in particular need have been investigated yet.

METHODS

This study aimed at determining the long-term effects of PAC and detecting predictors of treatment outcome within a multicenter randomized controlled trial measured at five time points up to twelve months after discharge. At inpatient admission to IIPT, patients (N=419, 14.3 years of age, 72.3% female) were randomly assigned to intervention or control group. After IIPT discharge, the intervention group received PAC, whereas the control group received treatment as usual (TAU). Patient-reported outcomes included pain and emotional characteristics. Clinicians assessed potential psychosocial risk factors and their prognosis of treatment outcome. Statistical analyses included mixed-models and univariable logistic regressions.

RESULTS

Data at the 12-month follow-up (n=288) showed a significant benefit of PAC compared with TAU; the majority (59.0%) of patients in the PAC-group reported no chronic pain compared to 29.2% of TAU-patients (p<.001). Patients with a single parent specifically benefited from PAC compared to TAU. Clinicians were able to make a reliable prognosis of treatment outcome, but did not successfully predict which patients would benefit the most from PAC.

CONCLUSIONS

Study results suggest that PAC is highly effective irrespective of patient characteristics, but particularly for patients with single parents. Its broad implementation could help to improve the long-term outcomes of youth with severely disabling chronic pain.

Treatment for Pediatric Functional Abdominal Pain: An Initial Examination of Reciprocal Associations Between Pain, Functional Impairment, and Parental Distress

OBJECTIVE

While cross-sectional studies underline that child and parent factors in pediatric chronic pain are reciprocally related, so far, little is known on their prospective relationship, especially in treatment contexts. This study aims to analyze directions of influence between child and parental outcomes using data from an intervention study.

METHODS

The sample covered 109 families with children aged 7-13 years diagnosed with functional abdominal pain (FAP). Child outcomes included pain and impairment, and parental outcomes covered caregiver-specific distress including both parental personal time burden (i.e., less time available for personal needs) and emotional burden due to child's pain (i.e., increased worries). Cross-lagged panel analyses examined the directions of the relations between child and parental outcomes across time (pretreatment T1, post-treatment T2, and 3-month follow-up and 12-month follow-up T3/T4).

RESULTS

First, a significant improvement over time in all measures was observed. Cross-lagged effects were found for less parental personal time burden at T2, predicting both less pain (β = -0.254, p = .004) and less impairment (β = -0.150, p = .039) at T3. Higher baseline pain was predictive for higher parental emotional burden after treatment (β = -0.130, p = .049) and, reversely, for less emotional burden at 12-month follow-up (β = 0.261, p = .004).

CONCLUSIONS

Addressing parental personal time burden in FAP treatment might possibly support the improvement on the child level. Replication of results in larger samples is warranted to gain more insight into the directions of influence and, in that way, to optimize treatment for pediatric FAP.

Assessing fatigue in children and adolescents: Psychometric validation of the German version of the PROMIS® Pediatric Short Form v2.0 - Fatigue 10a in school children and pediatric chronic pain patients

Purpose

Fatigue is a common symptom in children and adolescents. Its negative impact on health outcomes is even more pronounced in those with chronic pain. There is currently no fatigue measurement tool in German that is validated for both children and adolescents with and without chronic pain. Therefore, this study aimed to gather quantitative validity evidence to support the use of the German version of the PROMIS^® Pediatric Short Form v2.0 - Fatigue 10a (PROMIS^® F-SF) in the German pediatric general population as well as in German pediatric chronic pain patients.

Methods

The 10-item self-assessment questionnaire was validated in a sample of N = 1348 school children (9–18 years; 52.4% female) and N = 114 pediatric chronic pain patients (8–17 years; 63.3% female). Construct and convergent validity, reliability, and item and scale characteristics were examined.

Results

Confirmatory factor analyses showed sufficient model fit for the 1-factor model of the questionnaire (school sample: CFI = 0.94, RMSEA = 0.10, SRMR = 0.04; patient sample: CFI = 0.90, RMSEA = 0.14, SRMR = 0.05). Convergent validity was supported by weak-to-large significant correlations with sleep quality, health-related quality of life (HRQoL), and pain characteristics. The questionnaire had excellent internal consistency in both samples (α = 0.92 and α = 0.93). Sex differences and age distributions of the PROMIS^® F-SF showed that girls reported significantly higher fatigue than boys and that fatigue increased with age.

Conclusion

The PROMIS^® F-SF is a reliable instrument with good psychometric properties. Preliminary evidence is provided that the questionnaire validly measures fatigue in children and adolescents with and without chronic pain.

Supplementary Information

The online version contains supplementary material available at 10.1007/s11136-021-03032-8.

Effectiveness of a Psychosocial Aftercare Program for Youth Aged 8 to 17 Years With Severe Chronic Pain: A Randomized Clinical Trial

IMPORTANCE

Severe chronic pediatric pain causes individual suffering and significantly affects social functioning and psychological well-being. For children with high pain severity, intensive interdisciplinary pain treatment (IIPT) is a well-established treatment. However, across specialized centers, it is not sufficient for all patients.

OBJECTIVE

To evaluate the effectiveness of a psychosocial aftercare (PAC) program for pediatric patients with severe chronic pain followed up for 6 months after discharge from IIPT.

DESIGN, SETTING, AND PARTICIPANTS

This multicenter randomized clinical trial with 4 assessment points (pre-IIPT, immediately post-IIPT, 3 months, and 6 months) was conducted at 3 pediatric specialized tertiary care pain centers in Germany between September 11, 2018, and March 31, 2020. Included patients were aged 8 to 17 with a severe chronic pain condition who had been admitted for IIPT. Data were analyzed from June 8 to September 4, 2020.

INTERVENTIONS

Patients and their families were randomly assigned to 1 of 2 study groups at inpatient IIPT admission. Both groups received standardized 3- to 4-week IIPT. After IIPT discharge, the intervention group received PAC and the control group received usual care. PAC involved ongoing contact with a social worker for as long as the family requested the support, up to a maximum of 6 months.

MAIN OUTCOMES AND MEASURES

The primary outcome measure was pain at 6 months, measured using the Chronic Pain Grading (CPG), an instrument based on an algorithm indicating severity of the chronic pain disorder. Secondary outcomes included other pain-related and emotional parameters.

RESULTS

A total of 419 patients were randomized (mean [SD] age, 14.3 [2.1] years; 303 [72.3%] girls; 116 [27.7%] boys), with 218 assigned to usual care and 201 assigned to PAC. At baseline in both groups, the median (IQR) CPG was 3 (2-4). Superiority of PAC compared with usual care was demonstrated at 6 months (median [IQR] CPG: usual care, 2 [2-3]; PAC, 1 [1-2]; r = 0.30; 95% CI, 0.17-0.41). Additionally, PAC significantly improved emotional parameters (eg, significant time × group interaction: b = -8.84; P < .001).

CONCLUSIONS AND RELEVANCE

This randomized clinical trial found that PAC improved pain-related and emotional parameters during the intervention 6 months after discharge from IIPT. Future research is needed to investigate the intervention's long-term effects.

TRIAL REGISTRATION

German Clinical Trials Register ID: DRKS00015230.

Unified Multifactorial Model of Parental Factors in Community-Based Pediatric Chronic Pain

OBJECTIVE

The combination of parental chronic pain and internalizing characteristics are relevant to chronic pain experiences in their children. A promising unified multifactorial intergenerational model of chronic pain was published in 2019; however, this model was only generalizable to children with severe chronic pain and some factors had limitations. This study aimed to determine validity of an adapted multifactorial model, including parent and child chronic pain status, pain characteristics, pain-related functioning, and internalizing symptoms, in a community setting. Subgroup analyses based on presence of chronic pain in parents and children were explored to determine whether effects were stronger in certain subsamples.

METHODS

Adolescents (N = 1,450, Mage=12.7 years, 50% female), and their parents (82% mothers), were recruited from five schools to complete online surveys. Structural equation modeling was used to investigate interrelated pain-related experiences between parents and their offspring.

RESULTS

The adapted unified multifactorial model had good model fit in the community sample. Significant weak associations were found between all parent and child factors. The strongest associations were found in the subsample of parents and children with chronic pain. In all subgroups, internalizing factors were the most strongly linked intergenerational constructs.

CONCLUSIONS

Our results support the validity of the unified multifactorial model of parental factors in pediatric chronic pain, although associations were weaker in the community sample than those previously reported in a clinical sample. In children who develop chronic pain, it is important to consider their parent's chronic pain and internalizing symptoms to best manage intergenerational effects.

Economic long-term effects of intensive interdisciplinary pain treatment in paediatric patients with severe chronic pain: Analysis of claims data

OBJECTIVE

Chronic pain in children and adolescents gives rise to high healthcare costs. Successful treatment is supposed to reduce the economic burden. The objective of this study was to determine the changes in healthcare utilization and expenditures from 1 year before (Pre) intensive interdisciplinary pain treatment (IIPT) to the first (Post 1) and second (Post 2) years after discharge in a sample of paediatric chronic pain patients.

METHODS

Claims data from one statutory health insurance company were analysed for 119 children and adolescents (mean age = 15.3, 68.9% female) who sought IIPT at the German Paediatric Pain Centre. Costs incurred for inpatient treatment, outpatient treatment, medication, remedies and aids were compared before treatment and 2 years after discharge. Healthcare utilization was compared using Wilcoxon signed-rank test, and expenditures using trimmed means and the Yuen's t-test.

RESULTS

Overall costs were significantly lower in the 2 years after IIPT compared to before IIPT (Pre: 3,543€, Post 1:2,681€, Post 2:1937€ (trimmed means)). Healthcare utilization changed significantly; hospitalizations decreased in the years after discharge, while psychotherapies stayed stable in the year after discharge but lessened in the second year.

CONCLUSION

The results of this study support prior findings on the high economic burden of paediatric chronic pain. IIPT may contribute to a transition in healthcare utilization from somatic-focused treatments to more psychological treatments. Overall costs were reduced as soon as the first year after discharge and decreased even further in the second year.

SIGNIFICANCE

This study analyses original claims data from paediatric chronic pain patients in the year before and up to 2 years after intensive interdisciplinary pain treatment in a specialized paediatric pain centre. The analysis of long-term data reveals a continuous cost reduction after intensive interdisciplinary pain treatment and a change in the subsequent outpatient treatment.

Do Children With Functional Abdominal Pain Benefit More From a Pain-Specific Cognitive-Behavioral Intervention Than From an Unspecific Attention Control Intervention? Results of a Randomized Controlled Trial

INTRODUCTION

We aimed to compare the efficacy of cognitive-behavioral therapy (CBT) among children with functional abdominal pain with an attention control (AC), hypothesizing the superiority of CBT group intervention regarding pain intensity (primary outcome), pain duration and frequency (further primary outcomes), functional disability, and quality of life and coping strategies (key secondary outcomes).

METHODS

We conducted a prospective, multicenter, randomized controlled efficacy trial (RCT) with 4 time points (before intervention, after intervention, 3-month follow-up, and 12-month follow-up). One hundred twenty-seven children aged 7-12 years were randomized to either the CBT (n = 63; 55.6% girls) or the AC (n = 64; 57.8% girls).

RESULTS

Primary endpoint analysis of the logarithmized area under the pain intensity curve showed no significant difference between groups (mean reduction = 49.04%, 95% confidence interval [CI] -19.98%-78.36%). Treatment success rates were comparable (adjusted odds ratio = 0.53, 95% CI 0.21-1.34, number needed to treat = 16). However, time trend analyses over the course of 1 year revealed a significantly greater reduction in pain intensity (40.9%, 95% CI 2.7%-64.1%) and pain duration (43.6%, 95% CI 6.2%-66.1%) in the CBT compared with the AC, but not in pain frequency per day (1.2, 95% CI -2.7 to 5.2). In the long term, children in the CBT benefitted slightly more than those in the AC with respect to functional disability, quality of life, and coping strategies.

DISCUSSION

Both interventions were effective, which underlines the role of time and attention for treatment efficacy. However, in the longer term, CBT yielded more favorable results.

Intergenerational transmission of chronic pain-related disability: the explanatory effects of depressive symptoms

ABSTRACT

Parents with chronic pain have a higher likelihood of having depression and anxiety and more often have children with these conditions. Depressive and anxious symptoms in children worsen pain-related disability and may be derived from exposure to their parents' symptoms. We assessed a model of intergenerational chronic pain-related disability that relies upon depressive and anxious symptoms of a mother and their child. Adolescents in grades 5 to 10 from 5 schools, and their mothers, completed standardized electronic questionnaires about pain. In maternal-offspring dyads (n = 1179), the mean offspring age was 12.7 years (SD = 1.7, range = 10-17) and 51% were girls. Logistic regression was used to investigate mother-offspring associations of chronic pain presence, and mediation models using multiple linear regression were used to investigate the proposed model. Adolescents of mothers with chronic pain had 1.67 (95% confidence interval [CI] = 1.29-2.16) times increased odds of chronic pain, with each year of exposure to maternal chronic pain associated with a 5% (odds ratio 95% CI = 1.01-1.10) increased likelihood of offspring chronic pain. Worse maternal pain-related disability was associated with worse offspring pain-related disability (β = 0.20, 95% CI = 0.06-0.34). The mediation model indicated maternal and adolescent offspring symptoms of depression explained 36% of the relationship between maternal and offspring pain-related disability, with 11% explained by the intergenerational transmission of depression (serial mediation). We conclude that worse pain-related disability is associated between parent and child, and that depressive symptoms common to both mother and child play a key role in this relationship.

The efficacy of an educational movie to improve pain and dysfunctional behavior in school children: A randomized controlled trial

BACKGROUND

Chronic pain in children is a serious issue, therefore calling for effective prevention/intervention measures. This study aimed to evaluate the efficacy of an educational movie on pain knowledge in school children in general and on pain-related behaviours and pain intensity in those who are affected by chronic pain. Regarding those affected, the association between pain knowledge and intensity, as well as the potential mediating effect of pain-related behaviours, were investigated.

METHODS

Recruited from four schools, N = 381 students (51.7% female; M_age  = 11.4, SD = 0.95) participated, of which n = 108 reported chronic pain. Each school was randomly allocated to the intervention or control group (cluster-randomization). At two time points spaced 4-5 weeks apart, students provided information on their pain knowledge, pain-related behaviour (passive pain coping, pain-related disability, missed school days, medication use) and pain intensity. After the first assessment, students in the intervention group watched an educational movie. Multilevel linear models for all outcomes were calculated as well as a mediation analysis.

RESULTS

Pain knowledge increased significantly in the intervention group (β = 2.76 [95% CI 2.20, 3.31]). However, no significant time-by-group interactions were found for pain-related behaviour or pain intensity. The mediation model identified that the indirect effect of pain knowledge on pain intensity was mediated by pain-related behaviour (β = -0.18, p = 0.014 and β = 0.38, p < 0.001, respectively).

CONCLUSIONS

Educational movies may be an effective tool for educating students about pain management. However, the knowledge gained may not be sufficient to improve pain behaviour and intensity overall.

SIGNIFICANCE

A 10-min educational movie on chronic pain management was tested in school children (N = 381). Following the intervention, knowledge of chronic pain concepts was statistically greater in the intervention group compared to the control group not watching the movie. Furthermore, a mediation model theoretically determined whether an association between pain knowledge and pain intensity exists, and whether this is explained by level of dysfunctional pain-related behaviorisms. Full mediation was confirmed.

[Parental responses to child pain : The role of parental and child somatic and anxiety symptoms]

Hintergrund

Elterliche kognitiv-affektive und verhaltensbezogene Reaktionen können die Chronifizierung von kindlichen Schmerzen beeinflussen. Unklar ist, ob Mütter und Väter unterschiedlich reagieren und inwieweit Top-down- (elterliche Somatisierung, Angstsymptome) und Bottom-up-Variablen (kindliche schmerzbezogene Beeinträchtigung, Angstsymptome) die elterlichen Reaktionen modulieren.

Ziele der Arbeit

(1) Vergleich der Somatisierung, Angstsymptome und elterlichen Reaktionen (Katastrophisieren, Zuwendung) von Müttern und Vätern chronisch schmerzkranker Kinder und (2) Untersuchung des Einflusses von Top-down- und Bottom-up-Variablen auf die elterlichen Reaktionen.

Methode

Eltern-Kind-Triaden (Kind, Mutter, Vater; je N = 21, Gesamt‑N = 63; Kinder: 50 % weiblich, 11–19 Jahre, ∅15,14 Jahre) wurden während einer kinder- und jugendpsychiatrischen Behandlung ihrer chronischen Schmerzen hinsichtlich der kindlichen Schmerzen und Angstsymptome, elterlicher Somatisierung und Angstsymptome und elterlichen Reaktionen mit validierten Fragebögen erfasst.

Ergebnisse

Mütter und Väter unterschieden sich nicht in Somatisierung, Angstsymptomen und Reaktionen. Eltern katastrophisierten stärker, wenn ihre Kinder sowohl unter Angstsymptomen als auch unter stärkerer schmerzbezogener Beeinträchtigung litten. Elterliche Zuwendung war verstärkt, wenn Eltern selbst Angstsymptome angaben. Jüngere Kinder und Mädchen erhielten mehr Zuwendung.

Diskussion

Im Einklang mit vorherigen Studien zeigt sich, dass elterliche und kindliche Angstsymptome, nicht aber das elterliche Geschlecht als modulierende Faktoren der elterlichen maladaptiven Reaktionen eine Rolle spielen. Dies sollte in Prävention und Therapie von Kindern mit chronischen Schmerzen und deren Bezugspersonen berücksichtigt werden.

Adolescents' Explanatory Models for Headaches and Associations with Behavioral and Emotional Outcomes

More than one-third of adolescents experience recurrent headaches. Usually, these headaches are of primary origin and modulated by different biological and psychosocial factors. While parents are often consulted in scientific research and medical care about the nature of their child's headache, it is unclear to what extent parents and their children agree upon the factors that cause them. Adolescents' own attributions of headaches have rarely been investigated, and it is unclear how those attributions affect behavioral and emotional outcomes. In the present study, adolescents with chronic headaches (N = 248) and their parents (N = 120) rated the influence of various biological and psychosocial factors on the adolescents' headaches. Associations between these factors and several behavioral and emotional outcomes were examined. The most frequently reported factor by both samples was stress; however, concordance between parents and adolescents was generally low. The factor "other disease" was significantly associated with medication consumption and school absence. This study is one of the first to provide insights into adolescents' own attributions of headaches. Furthermore, the significant associations of the factor with behavioral outcomes reveal the importance of understanding personal explanatory models of headache. Future studies should examine associations between subjective headache causes and the individual's experience of the disorder to improve headache interventions.

Short-Term and Long-Term Effectiveness of Intensive Interdisciplinary Pain Treatment for Children and Adolescents with Chronic Headache: A Longitudinal Observation Study

Pediatric chronic headache causes significant impairment to those affected and bears the risk of aggravation into adulthood. Intensive interdisciplinary pain treatment (IIPT) was found to positively affect pain-related and emotional outcomes in pediatric patients with chronic pain up to 4 years after treatment. This study was aimed at investigating the effect of IIPT on solely pediatric chronic headache patients. As part of a longitudinal observation study, n = 70 children and adolescents with chronic headache receiving IIPT were included, of which n = 47 completed the assessment at four assessment time points: before treatment (PRE) and at three follow-ups (6-MONTH FOLLOW-UP, 1-YEAR FOLLOW-UP, and 4-YEAR FOLLOW-UP). Pain-related (pain intensity, pain-related disability, school absence), as well as psychological outcome domains (anxiety, depression), were investigated. The results support the short-term and long-term efficacy of IIPT for pediatric chronic headache patients regarding the pain-related outcome measures by significant reductions from PRE to all follow-up measure points. For anxiety and depression, only short-term improvements were found. Future studies should specifically focus on the identification of methods to consolidate the beneficial short-term effects of IIPT on psychological outcome domains in the long term.

The German version of the revised Adolescent Sleep-Wake Scale (rASWS) - A validation study in pediatric pain patients and school children

OBJECTIVE

Sleep problems are common in children and adolescents with chronic pain. The revised Adolescent Sleep-Wake Scale (rASWS) is an internationally well-established instrument to assess sleep quality in adolescents. So far, no German version is available. The study aimed to provide a validated German version of the rASWS, specifically for use in children and adolescents with chronic pain.

METHODS

The translated questionnaire was validated in a sample of N = 159 pediatric outpatients with chronic pain (8-17 years; 65.4% female), who presented to a specialized pediatric pain center. For cross-validation a community sample of N = 1348 school children was analyzed.

RESULTS

Confirmatory factor analysis was conducted to examine the factor structure of the original 10-item 3-factor model in the sample of children and adolescents with chronic pain, which showed poor model fit. Model modifications were carried out by deleting 3 items with low factor loadings stepwise. The overall model fit of the final 3-factor model containing 7 items was excellent. Cronbach's α of the derived scales ranged from 0.74 to 0.86. Cross-validation in a community sample of school children confirmed the superiority of the 7-item model. The convergent validity of the measure was proved by moderate correlations between the rASWS and self-reported sleep problems. Associations with chronic pain characteristics were evident for pain-related disability.

CONCLUSIONS

The use of the 7-item version of the rASWS for German-speaking children and adolescents with and without chronic pain is recommended as a self-report measure of sleep quality.

[Diagnostics and therapy in children and adolescents with chronic pain : Trends in interventions potentially dangerous to health]

Hintergrund und Ziel der Arbeit

Bei der Behandlung chronischer funktioneller Schmerzen im Kindes- und Jugendalter nimmt international sowohl die Anzahl an diagnostischen und therapeutischen Maßnahmen als auch ihre Invasivität zu. Studienziel ist die Erforschung der vor Beginn einer spezialisierten stationären Schmerztherapie durchgeführten, die pädiatrischen Patienten potenziell gefährdenden Maßnahmen in Deutschland.

Material und Methoden

In einem retrospektiven Studiendesign wurden Patientenakten eines tertiären Kinderschmerzzentrums der Jahre 2004, 2008, 2012 und 2016 ausgewertet (N = 585). Neben diagnostischen und therapeutischen Maßnahmen wurden primäre Schmerzparameter und Patientencharakteristika erfasst. In einer interdisziplinären Expertenumfrage (N = 13) wurden die Invasivität, das Risiko und die psychische Belastung von Maßnahmen bewertet.

Ergebnisse

Diagnostische und medikamentöse Maßnahmen nehmen bis 2012 zu. Ab 2012 lässt sich ein abnehmender Trend erkennen (χ²(3) = 11,708; p = 0,008). Die Invasivität (χ²(3) = 13,342; p = 0,004), das Risiko (χ²(3) = 13,135; p = 0,004) und die psychische Belastung (χ²(3) = 14,403; p = 0,002) durchgeführter Maßnahmen zeigen ein gleiches Veränderungsmuster. In der Gesamtstichprobe sind Patienten mit Bauch- oder Gliederschmerzen besonders gefährdet für hoch invasive und sehr risikoreiche Diagnostik.

Diskussion

Eine Zunahme diagnostischer und therapeutischer Maßnahmen bei funktionellen Schmerzstörungen lässt sich nur bis 2012 beobachten. Bei bestimmten Patientengruppen kommen invasive, risikoreiche und die Psyche stärker belastende Maßnahmen häufiger zur Anwendung.

Zusatzmaterial online

Die Online-Version dieses Beitrags (10.1007/s00482-020-00506-5) enthält vier weitere Tabellen. Beitrag und Zusatzmaterial stehen Ihnen auf www.springermedizin.de zur Verfügung. Bitte geben Sie dort den Beitragstitel in die Suche ein, das Zusatzmaterial finden Sie beim Beitrag unter „Ergänzende Inhalte“.

Readiness to Change among Adolescents with Chronic Pain and Their Parents: Is the German Version of the Pain Stages of Change Questionnaire a Useful Tool?

The Pain Stages of Change Questionnaire (PSOCQ) measures patients’ willingness to engage in active self-management of their pain. The present study aimed to create validated German short versions of the PSOCQ for adolescents (PSOCQ-A) and their parents (PSOCQ-P). Additionally, an investigation of stages of change regarding pain characteristics and treatment outcomes was undertaken. In Study 1, the data of adolescents aged 11 to 18 years and their parents were collected prior to intake (N = 501) and at admission (N = 240) to specialist inpatient pain treatment. Confirmatory factor analyses indicated a poor fit of the full PSOCQ measures prior to intake, but an acceptable fit at admission. Short PSOCQ-A and PSOCQ-P versions were identified. In Study 2, these results were cross-validated with data from an additional N = 150 patients and their parents, collected during and 3 months after interdisciplinary inpatient pain treatment. Model fits for both short versions were acceptable, although low internal consistency for the PSOCQ-A Precontemplation and Contemplation subscales was identified. During treatment, both patients’ and their parents’ readiness to change increased. Stage of change at discharge did not predict treatment non-response 3 months later. This study indicates that the PSOCQ is neither meaningful prior to admission nor predictive of non-response to treatment. While some value may exist in monitoring treatment progress, based on the results of this study, it is not recommended that the PSOCQ-A and PSOCQ-P be used as a measure of stage of change in German pediatric pain populations.

Validating the German version of the Revised Children's Anxiety and Depression Scale in a sample of pediatric chronic pain patients

OBJECTIVE

Many children and adolescents with chronic pain report substantial emotional distress, such as symptoms of anxiety and depression, that need to be assessed for successful chronic pain treatment. In the context of pediatric chronic pain, the Revised Children's Anxiety and Depression Scale has been recommended for the assessment of anxiety and depression symptoms. Therefore, the present study aimed to validate the German version of the Revised Children's Anxiety and Depression Scale in a sample of children and adolescents with chronic pain.

METHODS

Data were collected from N = 300 children and adolescents (age 8-17 years) who presented with headache, abdominal pain and/or musculoskeletal pain at a specialized pediatric pain center for interdisciplinary outpatient pain evaluation.

RESULTS

Cronbach's α for the total and subscales of the Revised Children's Anxiety and Depression scale ranged from 0.73 to 0.95. Sound psychometric properties were found in terms of item properties, factor structure and convergent validity with other measures of anxiety and depression (r ranged from 0.40 to 0.94). Girls reported significantly higher levels of anxiety and depression compared with boys. Higher pain severity was associated with more symptoms of anxiety and depression.

CONCLUSION

This study demonstrated that the German version of the Revised Children's Anxiety and Depression Scale is a reliable and valid measure for the assessment of anxiety and depression symptoms in children and adolescents with chronic pain. Further studies in school and clinical samples are needed to establish German norms and cutoff points for this scale.

Efficacy of adding interoceptive exposure to intensive interdisciplinary treatment for adolescents with chronic pain: a randomized controlled trial

Fear of pain plays an important role in the maintenance of chronic pain. It may be reduced through exposure therapy. This 2-arm parallel samples randomized controlled trial aimed to investigate whether interoceptive exposure (IE) therapy enhances reductions in fear of pain (primary outcome), pain (pain intensity, pain-related disability, and school absence), and emotional characteristics (anxiety and catastrophizing) when implemented as an adjunctive treatment in the context of intensive interdisciplinary pain treatment for pediatric chronic pain patients. N = 126 adolescents, aged 11 to 17 years, who were receiving standard intensive interdisciplinary pain treatment were randomly assigned to either receive additional IE (n = 64) or additional relaxation therapy (RT) (n = 62). All patients were assessed at admission, discharge, and 3 months after discharge. The data of N = 104 patients were analyzed. Significant large reductions were found in the total score and subscale scores of the Fear of Pain Questionnaire for Children in both study groups (eg, total score [range 0-60; IE/RT]: admission M = 23.5/24.9; discharge M = 16.0/19.7; P < 0.001, (Equation is included in full-text article.)= 0.27) and mainly large reductions in pain characteristics. There were no greater decreases in the IE group (P > 0.1). The exploratory analyses revealed that the patients with high fear of pain before treatment (P < 0.05, (Equation is included in full-text article.)> 0.03) and the patients with abdominal pain (P < 0.04, (Equation is included in full-text article.)> 0.25) showed greater decreases in their fear of pain (total and subscale score) in the IE group than in the RT group. In conclusion, the results suggest that IE is not particularly effective for all the pediatric chronic pain patients, but the patients with high fear of pain before treatment and with abdominal pain strongly benefit from this intervention.

[Definition, diagnostics and therapy of chronic widespread pain and the (so-called) fibromyalgia syndrome in children and adolescents : Updated guidelines 2017]

BACKGROUND

The regular update of the guidelines on fibromyalgia syndrome, AWMF number 145/004, was scheduled for April 2017.

METHODS

The guidelines were developed by 13 scientific societies and 2 patient self-help organizations coordinated by the German Pain Society. Working groups (n = 8) with a total of 42 members were formed balanced with respect to gender, medical expertise, position in the medical or scientific hierarchy and potential conflicts of interest. A search of the literature for case series (cross-sectional- and longitudinal studies) for the topics diagnosis, etiology and pathophysiology and for randomised controlled trials (RCT) for treatment modalities from December 2010 to May 2016 was performed in the Cochrane library, MEDLINE, PsycINFO and Scopus databases. Levels of evidence were assigned according to the classification system of the Oxford Centre for Evidence-Based Medicine version 2009. The strength of recommendations was achieved by multiple step formalized procedures to reach a consensus. Efficacy, risks, patient preferences and applicability of available therapies were weighed up against each other. The guidelines were reviewed and approved by the board of directors of the societies engaged in the development of the guidelines.

RESULTS AND CONCLUSION

No consensus was achieved in the guideline group on whether the diagnostic label "juvenile fibromyalgia" should be used in the management of children and adolescents with chronic widespread pain. There was consensus in the guideline group that antidepressants and anticonvulsants should not be used to treat pain in the so-called juvenile fibromyalgia syndrome.

Quantitative sensory testing profiles in children, adolescents and young adults (6-20 years) with cerebral palsy: Hints for a neuropathic genesis of pain syndromes

INTRODUCTION

Many patients with cerebral palsy (CP) suffer chronic pain as one of the most limiting factors in their quality of life. In CP patients, pain mechanisms are not well understood, and pain therapy remains a challenge. Quantitative sensory testing (QST) might provide unique information about the functional status of the somatosensory system and therefore better guide pain treatment.

OBJECTIVES

To understand better the underlying pain mechanisms in pediatric CP patients, we aimed to assess clinical and pain parameters, as well as QST profiles, which were matched to the patients' cerebral imaging pathology.

PATIENTS AND METHODS

Thirty CP patients aged 6-20 years old (mean age 12 years) without intellectual impairment underwent standardized assessments of QST. Cerebral imaging was reassessed. QST results were compared to age- and sex-matched controls (multiple linear regression; Fisher's exact test; linear correlation analysis).

RESULTS

CP patients were less sensitive to all mechanical and thermal stimuli than healthy controls but more sensitive to all mechanical pain stimuli (each p < 0.001). Fifty percent of CP patients showed a combination of mechanical hypoesthesia, thermal hypoesthesia and mechanical hyperalgesia; 67% of CP patients had periventricular leukomalacia (PVL), which was correlated with mechanic (r = 0.661; p < 0.001) and thermal (r = 0.624; p = 0.001) hypoesthesia.

CONCLUSION

The combination of mechanical hypoesthesia, thermal hypoesthesia and mechanical hyperalgesia in our CP patients implicates lemniscal and extralemniscal neuron dysfunction in the thalamus region, likely due to PVL. We suspect that extralemniscal tracts are involved in the original of pain in our CP patients, as in adults.

Comparison of gut-directed hypnotherapy and unspecific hypnotherapy as self-help format in children and adolescents with functional abdominal pain or irritable bowel syndrome: a randomized pilot study

OBJECTIVE

Psychosocial treatments for chronic abdominal pain in childhood or adolescence are effective, but time consuming and hardly available. In the present study, gut-directed hypnotherapy (GDHT) and unspecific hypnotherapy (UHT) were compared to evaluate the feasibility and efficacy of a hypnotherapeutic self-help intervention.

PARTICIPANTS AND METHODS

Children/adolescents between 6 and 17 years of age with chronic abdominal pain were randomized to GDHT or UHT. The treatment period was 12 weeks each. Measurements were performed before and after treatment. The primary outcome was a pain diary. Analysis was carried out as per protocol.

RESULTS

Of 45 participants included, 13 were lost to follow-up. Thirty-two participants (14 GHDT, 18 UHT) were analyzed. Dropouts had higher pain severity. Completers in both conditions showed good adherence and a similar decrease in days with pain and pain duration. Pain intensity decreased only in the UHT condition. Eleven participants (two GDHT, nine UHT) achieved clinical remission (>80% improvement) and 13 participants (seven GDHT, six UHT) improved significantly (30-80%).

CONCLUSION

Results suggest a high efficacy of standardized home-based hypnotherapy for children/adolescents with abdominal pain. Children/adolescents with high pain severity are at risk of dropping out. The UHT condition showed slight evidence of superiority, but conditions were equivalent on most outcomes. Taken together, self-help approaches based on hypnotherapy could close a treatment gap and prevent chronification.

A two-week inpatient programme with a booster improved long-term management of severe chronic paediatric pain

In the context of limited healthcare resources and increasing demands for more cost-effective healthcare solutions, this study assessed the short- and long-term clinical outcomes and resource utilization of a two-week inpatient, interdisciplinary, pain treatment (IIPT) including individual and group cognitive behavioural, occupational, physical and recreational therapy, education and family intervention and a booster in the chronic paediatric pain setting. Using a longitudinal design with a two-year follow-up, two-week IIPT resulted in sustainable improvements in mean and maximum pain intensity, physical functioning and internalization and reductions in the mean number of medical visits, school absence and frequency of pain medication at year 2 following IIPT. While pain-related disability scores did not improve, problem-focused coping became more prevalent, and patient and parent-assessed satisfaction as well as pain experience continued to improve throughout the study. Our results demonstrate that a two-week IIPT with a booster confers meaningful short- and long-term improvements in clinical outcomes and resource utilization among paediatric patients with severe chronic pain.

[Therapy recommendations in a pediatric outpatient pain clinic : Adherence and effectiveness of implementation]

BACKGROUND

Supplementary pain-related recommendations for the treatment of chronic pain in children and adolescents are an essential component of multimodal pain treatment. Studies are scarce regarding adherence to these recommendations and their effectiveness.

OBJECTIVE

The aim of this study was to evaluate patient adherence to pain-related recommendations and their effectiveness 12 months after initial presentation of children and adolescents with chronic pain to a pediatric outpatient pain clinic.

MATERIALS AND METHODS

A total of 413 patients were assessed using a structured telephone interview. The assessment included pain characteristics during the last 4 weeks as well as information regarding the implementation of the pain-related recommendations and the effectiveness. Due to different recommendations given to migraine patients this subgroup was dealt with separately.

RESULTS

Patients reported significant improvements 12 months after the initial presentation and 29.5 % of the patients were pain free. Adherence levels and estimated effectiveness regarding recommendations, such as change of lifestyle, multimodal inpatient treatment and use of medication were high. Other recommendations, such as active relaxation and outpatient psychotherapy had low adherence levels and low estimated effectiveness. Migraine patients had a significantly higher adherence rate and estimated effectiveness regarding the recommendation use of medication than non-migraine patients.

CONCLUSION

The adherence level as well as the estimated effectiveness regarding the majority of pain-related recommendations was high. Some recommendations had low adherence rates and low estimated effectiveness. These results can help to further improve the performance of outpatient clinics for children and adolescents with chronic pain.

Psychosocial interventions for recurrent abdominal pain in childhood

BACKGROUND

This review supersedes the original Cochrane review first published in 2008 (Huertas-Ceballos 2008).Between 4% and 25% of school-aged children complain of recurrent abdominal pain (RAP) severe enough to interfere with their daily activities. No organic cause for this pain can be found on physical examination or investigation for the majority of such children. Although many children are managed by reassurance and simple measures, a large range of psychosocial interventions involving cognitive and behavioural components have been recommended.

OBJECTIVES

To determine the effectiveness of psychosocial interventions for reducing pain in school-aged children with RAP.

SEARCH METHODS

In June 2016 we searched CENTRAL, MEDLINE, Embase, eight other databases, and two trials registers. We also searched the references of identified studies and relevant reviews.

SELECTION CRITERIA

Randomised controlled trials comparing psychosocial therapies with usual care, active control, or wait-list control for children and adolescents (aged 5 to 18 years) with RAP or an abdominal pain-related functional gastrointestinal disorder defined by the Rome III criteria were eligible for inclusion.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures expected by Cochrane. Five review authors independently selected studies, assessed them for risk of bias, and extracted relevant data. We also assessed the quality of the evidence using the GRADE approach.

MAIN RESULTS

This review includes 18 randomised controlled trials (14 new to this version), reported in 26 papers, involving 928 children and adolescents with RAP between the ages of 6 and 18 years. The interventions were classified into four types of psychosocial therapy: cognitive behavioural therapy (CBT), hypnotherapy (including guided imagery), yoga, and written self-disclosure. The studies were carried out in the USA, Australia, Canada, the Netherlands, Germany, and Brazil. The majority of the studies were small and short term; only two studies included more than 100 participants, and only five studies had follow-up assessments beyond six months. Small sample sizes and the degree of assessed risk of performance and detection bias in many studies led to the overall quality of the evidence being rated as low to very low for all outcomes.For CBT compared to control, we found evidence of treatment success postintervention (odds ratio (OR) 5.67, 95% confidence interval (CI) 1.18 to 27.32; Z = 2.16; P = 0.03; 4 studies; 175 children; very low-quality evidence), but no evidence of treatment success at medium-term follow-up (OR 3.08, 95% CI 0.93 to 10.16; Z = 1.85; P = 0.06; 3 studies; 139 children; low-quality evidence) or long-term follow-up (OR 1.29, 95% CI 0.50 to 3.33; Z = 0.53; P = 0.60; 2 studies; 120 children; low-quality evidence). We found no evidence of effects of intervention on pain intensity scores measured postintervention (standardised mean difference (SMD) -0.33, 95% CI -0.74 to 0.08; 7 studies; 405 children; low-quality evidence), or at medium-term follow-up (SMD -0.32, 95% CI -0.85 to 0.20; 4 studies; 301 children; low-quality evidence).For hypnotherapy (including studies of guided imagery) compared to control, we found evidence of greater treatment success postintervention (OR 6.78, 95% CI 2.41 to 19.07; Z = 3.63; P = 0.0003; 4 studies; 146 children; low-quality evidence) as well as reductions in pain intensity (SMD -1.01, 95% CI -1.41 to -0.61; Z = 4.97; P < 0.00001; 4 studies; 146 children; low-quality evidence) and pain frequency (SMD -1.28, 95% CI -1.84 to -0.72; Z = 4.48; P < 0.00001; 4 studies; 146 children; low-quality evidence). The only study of long-term effect reported continued benefit of hypnotherapy compared to usual care after five years, with 68% reporting treatment success compared to 20% of controls (P = 0.005).For yoga therapy compared to control, we found no evidence of effectiveness on pain intensity reduction postintervention (SMD -0.31, 95% CI -0.67 to 0.05; Z = 1.69; P = 0.09; 3 studies; 122 children; low-quality evidence).The single study of written self-disclosure therapy reported no benefit for pain.There was no evidence of effect from the pooled analyses for any type of intervention on the secondary outcomes of school performance, social or psychological functioning, and quality of daily life.There were no adverse effects for any of the interventions reported.

AUTHORS' CONCLUSIONS

The data from trials to date provide some evidence for beneficial effects of CBT and hypnotherapy in reducing pain in the short term in children and adolescents presenting with RAP. There was no evidence for the effectiveness of yoga therapy or written self-disclosure therapy. There were insufficient data to explore effects of treatment by RAP subtype.Higher-quality, longer-duration trials are needed to fully investigate the effectiveness of psychosocial interventions. Identifying the active components of the interventions and establishing whether benefits are sustained in the long term are areas of priority. Future research studies would benefit from employing active control groups to help minimise potential bias from wait-list control designs and to help account for therapist and intervention time.

Chronic Abdominal Pain in Children and Adolescents: Parental Threat Perception Plays a Major Role in Seeking Medical Consultations

Background. Pain symptoms, associated impairment, and parental perception of threat are reported to be predictors of health care utilization (HCU) in childhood chronic abdominal pain (CAP). However, mediating variables and their interrelations have not yet been systematically studied. Objectives. This study aims to identify mediating pathways of influence between child's abdominal pain and the number of pain-related medical visits. Methods. In a multicenter study, we recruited N = 151 parent-child dyads with children aged 6-17 years suffering from CAP. A composite measure of pain symptoms was defined as predictor and the number of pain-related medical visits as outcome variable. This relation was analyzed by serial mediation, including child- and parent-reported impairment and parental threat perception as mediators. Results. Only parental threat perception significantly linked child's pain symptoms to the number of medical visits. Measures of impairment did not have a significant effect. Conclusions. Parental pain-related threat perception is strongly related to health care seeking in childhood CAP. Addressing threat perception might be a fruitful parent-centered approach in clinical practice.

Psychological distress and stressful life events in pediatric complex regional pain syndrome

BACKGROUND

There is little knowledge regarding the association between psychological factors and complex regional pain syndrome (CRPS) in children. Specifically, it is not known which factors precipitate CRPS and which result from the ongoing painful disease.

OBJECTIVES

To examine symptoms of depression and anxiety as well as the experience of stressful life events in children with CRPS compared with children with chronic primary headaches and functional abdominal pain.

METHODS

A retrospective chart study examined children with CRPS (n=37) who received intensive inpatient pain treatment between 2004 and 2010. They were compared with two control groups (chronic primary headaches and functional abdominal pain; each n=37), who also received intensive inpatient pain treatment. Control groups were matched with the CRPS group with regard to admission date, age and sex. Groups were compared on symptoms of depression and anxiety as well as stressful life events.

RESULTS

Children with CRPS reported lower anxiety and depression scores compared with children with abdominal pain. A higher number of stressful life events before and after the onset of the pain condition was observed for children with CRPS.

CONCLUSIONS

Children with CRPS are not particularly prone to symptoms of anxiety or depression. Importantly, children with CRPS experienced more stressful life events than children with chronic headaches or abdominal pain. Prospective long-term studies are needed to further explore the potential role of stressful life events in the etiology of CRPS.