Fatigue in Children and Adolescents: A Population-Based Longitudinal Study on Fatigue and Chronic Pain.

OBJECTIVE: There are limited data on the prevalence and stability of fatigue in pediatrics, particularly among youth with chronic pain. Little is known about longitudinal effects of fatigue on health outcomes such as sleep quality, psychological distress, Health-Related Quality of Life, and chronic pain. METHODS: A community-based sample of N = 1276 students (9-17 years; 52% female; 30.3% with chronic pain) from 3 schools was screened at 2 measurement points 3 months apart. Prevalence and stability of fatigue were examined. Longitudinal analyses regarding fatigue and health outcomes were run using repeated measures correlations. The impact of change in fatigue on pain progression was analyzed using multilevel linear models. RESULTS: In the total community sample, 4.4% reported severe fatigue symptoms. The prevalence of severe fatigue was significantly higher in students with chronic pain (11.4%) compared to those without (1.3%). Fatigue symptoms persisted for several months, worsening of symptoms was more common and improvement less common in children with chronic pain. Sleep, psychological distress, and Health-Related Quality of Life were significantly associated with fatigue across both measurement points (rs = |0.16-0.44|), with no significant differences in the strength of correlations between children with and without chronic pain (ps > .05). There was a significant interaction between change in fatigue and courses of pain intensity and functional impairment. CONCLUSIONS: Fatigue is highly prevalent, particularly in youth with chronic pain. The negative association of fatigue with health outcomes, and its impact on the course of pain, require early identification and treatment of those affected to prevent negative long-term consequences.

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.

[Interdisciplinary multimodal inpatient pain treatment for young adults : Influence of autonomy on effectiveness]. / Interdisziplinäre multimodale stationäre Schmerztherapie für junge Erwachsene : Einfluss der Autonomie auf die Effektivität.

BACKGROUND: Emerging adulthood between the ages of 18 and 25 are vulnerable years that offer many opportunities and simultaneously represent huge challenges for autonomy and identity development. Chronic pain in this vulnerable stage of life is associated with long-term negative consequences. So far, knowledge regarding the effectiveness of treatment offers for this patient group is scarce. OBJECTIVE: The aim of this study is to examine the effectiveness of a multimodal inpatient pain therapy for young adults with chronic pain. In addition, the change and influence of the autonomy development will be investigated. MATERIALS AND METHODS: The present longitudinal study examined the effectiveness of a 3-week multimodal inpatient pain treatment in young adults with chronic pain. Three-month follow-up data from 74 patients aged 18-25 years (75.7% female) were included in the study. Standardized questionnaires were used to investigate pain characteristics, pain-associated and emotional impairments quality of life, and various facets of autonomy. RESULTS: The results show that pain-related and emotional impairments are significantly reduced after therapy. Furthermore, there is a significant improvement in the quality of life and resilience. The increased quality of life and reduced pain-related and emotional impairment are associated with a gain of autonomy convictions. DISCUSSION: Multimodal inpatient pain treatment seems to be effective during emerging adulthood. Autonomy convictions seem to be an important starting point for therapeutic success and have a modulating importance in terms of positive changes in emotional impairment and quality of live. Therefore, this aspect should be considered when pain treatment offers are developed for this age group.

[The association between intelligence and pain in children and adolescents with severely impairing chronic pain : A retrospective analysis]. / Der Zusammenhang von Intelligenz und Schmerz bei Kindern und Jugendlichen mit schwer beeinträchtigenden chronischen Schmerzen : Eine retrospektive Analyse.

BACKGROUND: To date only few studies have addressed the level of intelligence of children and adolescents with chronic pain. The few currently available studies suggest a cognitive performance of pediatric pain patients in the average range (IQ 85-115); however, only little is known about the relationship between pain characteristics and cognitive skills. OBJECTIVE: The aim of the study was to retrospectively examine the intelligence scores of severely impaired pediatric chronic pain patients to improve the knowledge about the association of pain and cognitive performance and to create a basis for further prospective studies. MATERIAL AND METHODS: In the exploratory evaluation data from N = 180 children and adolescents who were treated as inpatients at the German Pediatric Pain Center in Datteln in 2016 were included. Due to the standardization of the IQ scores a comparison within the sample was possible as well as a comparison to the norm sample. RESULTS: The intelligence level of severely impaired pediatric pain patients fell within the normal range (M = 99.32; SD = 14.13). Neither the main pain location nor the emotional variables or pain parameters (e.g. pain intensity) had a significant association with the IQ scores. Compared to the norm sample, pediatric pain patients had a higher processing speed. Intraindividual comparisons showed a significantly lower verbal IQ than performance IQ and a lower verbal comprehension compared to perceptual organization and processing speed. Moreover, there was a negative association between pain intensity, the verbal IQ and verbal comprehension. CONCLUSION: The results support the assumption that the intellectual performance of pediatric pain patients lies within the average range; however, the results indicate a limited competence in verbal abstraction and expressiveness of pediatric pain patients, which are negatively related to pain intensity. Further studies to examine causal relationships are needed.

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; M age = 12.95, SD = 2.22). Construct validity and sensitivity to change were examined within a sample of N = 2448 children and adolescents (M age = 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.

The German version of the Revised Children's Anxiety and Depression Scale-Psychometric properties and normative data for German 8- to 17-year-olds.

OBJECTIVES: Anxiety and depression are internalizing mental disorders often commencing in childhood and manifesting in adolescence. The Revised Anxiety and Depression Scale (RCADS) is an internationally widely used standardized diagnostic tool, but the German version has only been validated in a pediatric chronic pain sample; normative data are not available. The aim of this study is to test its reliability (internal consistency) and validity (factorial, convergent, known-groups) in a representative German school sample and to provide norm data. METHODS: Data were collected from N = 1562 German schoolchildren (Mage  = 12.2; SDage  = 2.33; range 8-17 years; 52.4% girls). RESULTS: Cronbach's α ranged from 0.73 to 0.96 for the total and the six subscales (five anxiety and one depression). Confirmatory factor analysis showed the 6-factor model had acceptable to good model fit with CFI = 0.93, TLI = 0.93, RMSEA = 0.05, SRMR = 0.05, which was better than 1- and 2-factor models. The (sub)scales correlated moderate to high negatively with health-related quality of life (-0.31 ≤ τ ≤ -0.51; p < 0.001) and positively with functional impairment (0.31 ≤ τ ≤ 0.48; p < 0.001). Mean scores of anxiety and depression scales were significantly higher in girls and partly in adolescents. CONCLUSION: Findings provide support for the good psychometric properties of the German RCADS in a community sample.

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.

Chronic Pain in Schoolchildren and its Association With Psychological Wellbeing Before and During the COVID-19 Pandemic.

PURPOSE: The current longitudinal observational study aimed to explore how chronic pain among schoolchildren changed before and during the COVID-19 pandemic, and how changes in chronic pain were related to changes in psychological wellbeing and COVID-19-related experiences. METHODS: Data were collected from N = 777 German schoolchildren (aged 9-17 years) at two assessments before and one assessment during the COVID-19 pandemic lockdown. Participants self-reported chronic pain experience, anxiety, depression, and quality of life across all assessments; and COVID-19-related experiences at the last assessment. Trajectories of anxiety, depression, and quality of life as well as COVID-19-related experiences were analyzed separately for groups of stable chronic pain trajectories compared to chronic pain trajectories that changed during the pandemic. RESULTS: Chronic pain prevalence was lowest at the assessment during the COVID-19 pandemic (22.8% vs. 29.2% and 29.9% before the pandemic). However, 4.6% experienced new chronic pain onset during the COVID-19 pandemic. This was preceded by heightened depression and anxiety, as well as lowered quality of life scores. These students were also more likely to describe time with their family during the COVID-19 pandemic as tense compared to students who did not develop chronic pain. During the COVID-19 pandemic boys were more likely to recover from ongoing chronic pain than girls. CONCLUSIONS: Overall, during the COVID-19 pandemic the prevalence of chronic pain decreased. However, stressful situations and pre-existing vulnerabilities in psychological wellbeing can facilitate the development of chronic pain during the pandemic.

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.