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Context: General fatigue, sleep-related fatigue, and cognitive fatigue are prevalent and disruptive in adults with chronic musculoskeletal (MSK) pain, but little is known about these fatigue subtypes in pediatric musculoskeletal pain. Objective: To compare fatigue and its subtypes between adolescents with chronic MSK pain and pain-free controls and to test if fatigue subtypes were associated with concurrent pain and its impact (pain intensity, number of pain sites, pain interference, and functional disability) or experimental pain (intensity and tolerance) in adolescents with chronic MSK pain. Finally, we sought to explore adolescents' qualitative characterizations of their fatigue. Methods: Adolescents with chronic MSK pain (12-17 y.o., n = 26) and pain-free controls (n = 26) completed validated self-report measures of fatigue, pain, and functional disability, underwent an experimental pain tolerance task (cold water immersion of the hand), and provided qualitative descriptions of their fatigue (pain group only). Results: Adolescents with chronic MSK pain reported significantly greater general, sleep-related, and cognitive fatigue than pain-free controls (all p's < 0.001). In adolescents with chronic MSK pain, fatigue subtypes were associated with clinical pain and pain impact (r's = 0.43-0.84) but not experimental pain measures (p's > 0.05). Adolescents with chronic MSK pain qualitatively described the negative implications of the different fatigue subtypes, particularly when perceived as long-lasting. Conclusion: This preliminary study suggests that fatigue subtypes are prevalent and impactful in pediatric patients with chronic MSK pain. When planning multi-disciplinary treatment for pediatric MSK pain, providers should recognize fatigue as another disabling symptom. Keywords: disability, fatigue, pediatric, musculoskeletal pain, widespread bodily pain

Youth with sickle cell disease (SCD), a genetic disorder of red blood cells, may experience acute pain episodes lasting 2 to 3 days on average. While existing research has demonstrated associations between SCD pain and poor social functioning in youth with SCD, there are no data on whether symptoms of depression and anxiety modify the relationship between pain and functional outcomes in pediatric pain populations. It was hypothesized that more symptoms of depression and anxiety would exacerbate the relationship between high pain and poor social functioning in youth with SCD. We conducted a cross-sectional study of 114 youth with SCD and their guardians assessing the youth's pain, social functioning, and symptoms of depression and anxiety. Analyses indicated that elevated levels of depressive symptoms were related to poorer self-reported interpersonal skills. More anxiety symptoms were related to better guardian-reported social skills and weakened the relationship between high pain frequency and poor self-reported interpersonal skills. Findings build on previous work supporting the need for multidisciplinary approaches to care for youth with SCD who experience pain, and provide rationale for future studies to investigate the direct and possible moderating effects of depression and anxiety symptoms on other functional outcomes in youth with SCD and other pediatric pain populations.

Introduction A growing literature documents the associations between discrimination and health. Emerging evidence suggests that among Hispanic/Latinx immigrants, discrimination leads to the deterioration of health outcomes over time. While sleep has been proposed as an important mediator of the relationship between discrimination and health, few studies have explicitly investigated this pathway, particularly among Hispanic/Latinx populations. Objective To investigate the relationships between racial/ethnic discrimination, sleep, and physical and mental health among Hispanic/Latinx immigrants in the USA. Data and Methods Using data from a parent study of first-generation Hispanic/Latinx immigrants in the southeastern USA, we conducted sequential mediation analyses using the bootstrapping method to investigate whether self-reported sleep duration, sleep quality, and fatigue mediate the relationship(s) between self-reported discrimination, as measured by the discrimination subscale of the Riverside Acculturative Stress Inventory, and self-reported physical and mental health. Results Nocturnal awakenings, fatigue, and sleep quality were statistically significant sequential mediators of the relationship between discrimination and physical health ( b = −.001, SE = .001, CI [−.0027, −.0001]); fatigue alone also mediated this relationship ( b = −.01, SE = .01, CI [−.0279, −.0003]). Nocturnal awakenings, fatigue, and sleep quality were also significant sequential mediators of the relationship between discrimination and mental health ( b = −.001, SE = .001, CI [−.0031, −.0001]). Conclusion Sleep and fatigue play an important role in linking discrimination and health among first-generation Hispanic/Latinx immigrants. The development and implementation of interventions that focus on reducing fatigue among this population could mitigate the effects of unfair treatment on health outcomes.

While the association of racial discrimination and internalizing symptoms in Black individuals is well established, we still have a limited understanding of mechanisms and contextual factors influencing this association, such as sleep and the family context. The present study examined sleep and fatigue as mediators underlying the relationship between racial discrimination and internalizing symptoms within Black adolescent-caregiver dyads. Using data from a larger survey study of risk and resilience in Black adolescents (Mage= 14.36, 49.5% female) and their caregivers (Mage= 39.25, 75.9% female), we used the Actor-Partner Interdependence Model extended Mediation (APIMeM) to test associations of racial discrimination, sleep factors, and internalizing symptoms among 179 dyads. Significant actor effects revealed that sleep disturbance and fatigue independently mediated the association of racial discrimination and internalizing symptoms among adolescents and caregivers. Additionally, partner effects were found, such that adolescents’ experiences of discrimination were indirectly associated with their caregivers’ internalizing symptoms via caregiver fatigue. No direct or indirect effects of caregiver experiences of discrimination on adolescent outcomes were found. The findings highlight the important role sleep and fatigue play in the link between racial discrimination and internalizing symptoms among Black adolescents and adults; and the role that the family context may play in this association. Mental health and sleep interventions for Black individuals should address the impact of racial discrimination on internalizing symptoms, with an emphasis on family-focused interventions.

Background The negative health consequences of personal experiences of racial discrimination (personal-level discrimination) has been well-documented across developmental stages, including adolescence, in Black individuals. There is also some evidence suggesting perceiving other Black individuals experiencing racial discrimination (group-level discrimination) can protect one’s health in Black adults. Methods This study examined the role of personal- and group-level discrimination in Black adolescent health. The study was a secondary analysis of survey data collected from 186 Black adolescents that included reports of discrimination, physical function, anxiety, and depression. Results Black adolescents who reported greater, as opposed to lower, personal-level discrimination were more likely to experience poorer physical and mental health outcomes. While group-level discrimination was also associated with physical health outcomes, it was not directly associated with mental health outcomes. Importantly, across all three health outcomes, awareness of group-level discrimination mitigated the negative health consequences of personal-level discrimination. Among adolescents who reported low levels of group-level discrimination, personal-level discrimination was associated negatively with physical function and positively with anxiety and depressive symptoms. Among adolescents who reported high levels of group-level discrimination, there was no association between personal-level discrimination and any of the health outcomes. Discussion Consistent with prior research with Black adults, awareness of high group-level discrimination may protect Black adolescents from the negative health consequences of personal-level discrimination. The pattern of the results is also consistent with the literature of the personal-group discrimination discrepancy (PGDD) and psychological wellbeing. Future research should investigate the psychological mechanisms implicated in PGDD (e.g., external attribution of discrimination and intragroup comparison) as potential coping strategies for Black adolescents against the negative health consequences of personal-level discrimination.

This study investigated the temporal relationship between pain and sleep in children with sickle cell disease (SCD) and examined the influence of additional stressors and pain medication practices on this relationship. To accomplish the goals of the study, 20 children with SCD aged 8 to 12 years of age completed daily diaries for approximately 5 weeks. These diaries were analyzed using multilevel models. Results were consistent with the hypothesis that there is a cyclic relationship between high SCD pain and poor sleep. Specifically, high levels of daily SCD pain were significantly related to poor sleep quality that night. Also, poor sleep quality during the night was significantly related to high SCD pain that day. Poor sleep quality appeared to be the stronger predictor in the pain-sleep cycle. Additional stressors and pain medication use did not evidence a substantial impact on the relationship between SCD pain and sleep, but instead evidenced more direct influences on SCD pain and sleep aspects. Clinical and policy implications include the possible benefits of raising awareness among clinicians, policymakers, patients, and their parents about the interaction between the child's symptoms and sleep patterns. Additional research should study how other disease symptoms may influence sleep and how sleep may influence other disease symptoms. In addition, this research should examine the role of disease management strategies implemented by the child and his/her family on these relationships.