Pain Catastrophizing Moderates the Relationship Between Pain Sensitivity and Clinical Pain in Adolescents With Functional Abdominal Pain

Pain catastrophizing has been linked to amplified pain sensitivity assessed using quantitative sensory testing (QST) in adults; pediatric data are limited, particularly in youth with functional abdominal pain (FAP). With increasing use of QST to evaluate somatosensory function and predict pain outcomes, we examined the associations between QST and clinical pain in adolescents with FAP and tested the moderating effects of pain catastrophizing. Seventy-seven adolescents (mean age 16.6 years, 85.7% female, 72.7% White, 90.8% non-Hispanic) who fulfilled diagnostic criteria for FAP completed QST assessment (pressure pain threshold and tolerance, heat pain threshold, conditioned pain modulation) and measures of abdominal pain intensity, pain interference, and pain catastrophizing. Adjusting for age and sex, only higher heat pain threshold was associated with higher abdominal pain intensity (Beta per 1-standard deviation = .54, P = .026). Contrary to hypothesis, for youth with higher pain catastrophizing, higher pressure pain tolerance was associated with greater abdominal pain intensity, but associations were not significant for youth with lower catastrophizing (P = .049). Similarly, for those with higher pain catastrophizing (in contrast to lower pain catastrophizing), higher pressure pain thresholds and tolerance were associated with higher pain interference (P = .039, .004, respectively). Results highlight the need to investigate the influence of pain catastrophizing on QST. PERSPECTIVE: This study demonstrated unexpected findings of pain catastrophizing moderating the relationships between pressure pain threshold and tolerance, and clinical pain in adolescents with FAP. This raised questions regarding our understanding of psychological contributions to QST findings in pediatric populations with chronic pain.

Comparing the prevalence of chronic pain in school-aged children in the United States from 2019 to 2020: a nationally representative study examining differences associated with the COVID-19 pandemic

ABSTRACT

The coronavirus disease 19 (COVID-19) pandemic negatively affected children's health in the United States (US), with more severe disruption for marginalized groups. However, potential impact on pediatric chronic pain has not been assessed at the population level. This study aimed to (1) estimate differences in the US national prevalence of pediatric chronic pain during the first year of the COVID-19 pandemic (2020), relative to one year earlier (2019); (2) determine whether differences in prevalence varied across sociodemographic groups; and (3) explore changes in child, caregiver, and family factors associated with chronic pain prevalence. Using data of children 6 to 17 years from the National Survey of Children's Health 2019 and 2020 (n = 50,518), we compared weighted percentages of sample characteristics by year and conducted a series of directed-acyclic graph-informed survey-weighted Poisson regressions. The estimated national prevalence (95% CI) of pediatric chronic pain was 10.8% (9.9, 11.9%) in 2019, decreasing to 7.6% (6.9, 8.3%) in 2020. Contrary to hypotheses, the adjusted prevalence of chronic pain was 31% lower in 2020 than in 2019 (aPR = 0.69, 95% CI: 0.61, 0.79), adjusting for child age, sex, race or ethnicity, caregiver education, neighborhood park or playground, and census region. The 2019 to 2020 change in chronic pain prevalence was similar by age ( P = 0.34), sex ( P = 0.94), race or ethnicity ( P = 0.41), caregiver education ( P = 0.49), neighborhood park or playground ( P = 0.22), and census region ( P = 0.20). Exploratory analyses identified 3 potential contributors to the unexpected decrease in the national prevalence of pediatric chronic pain: lower prevalence of bullying, more frequent family meals, and higher family resilience.

Executive Functioning and Self-Management Processes Mediate the Relationship Between Insomnia and Pain-Related Disability

Insomnia has been identified as a predictor of reduced benefit from cognitive-behavioral treatment (CBT) for adolescent chronic pain; however, it is not well understood how insomnia leads to reduced treatment response. The purpose of this study was to evaluate executive function and self-management processes as 2 potential mediators of the relationship between insomnia symptoms and pain-related disability outcomes from internet-delivered CBT using a single-arm clinical trial design. Eighty-five adolescents with chronic pain (77% female, ages 12-17 years) and their caregiver received an 8-week internet-delivered CBT intervention. Youth completed validated measures of insomnia symptoms, executive function, self-management processes, and pain-related disability at baseline, mid-treatment, immediate post-treatment, and 3-month follow-up. Results from multilevel structural equation modeling indicated that more severe insomnia symptoms were associated with greater problems with executive function, which, in turn, led to lower engagement in self-management processes and less improvement in pain-related disability. These findings identify 2 mediators by which higher insomnia symptoms may lead to reduced benefit from CBT intervention for chronic pain. Research is needed to understand whether psychological treatments for chronic pain may be optimized by strategies targeting insomnia, executive function, and/or engagement in self-management. This trial was registered at clinicaltrials.gov (NCT04043962). PERSPECTIVE: Our study suggests that executive functioning and self-management processes mediate the relationship between insomnia and treatment outcomes for pediatric chronic pain, highlighting the impact of insomnia on youth learning and implementation of self-management strategies and the critical need for targeted sleep interventions in this population.

Analgesic Patterns and Opioid Administration in Children Hospitalized With Acute Pancreatitis

BACKGROUND

Pain is the most common symptom of acute pancreatitis (AP), and opioids have been utilized as the cornerstone of treatment. Despite the adverse effects of opioids, data on effective analgesia in children with AP is lacking. We aimed to evaluate analgesia prescribing patterns in pediatric AP, identify factors associated with opioid administration, and test the associations between opioid administration and hospital length of stay (LOS).

METHODS

This is a retrospective cohort study of pediatric AP hospitalizations in a single institution from 2010 to 2020. Opioid administration was calculated for the first 48 hours of admission (morphine milligram equivalent; MME48). Data on multimodal analgesia [defined as the administration of acetaminophen and nonsteroidal anti-inflammatory drugs (NSAIDs)] during hospitalization was captured.

RESULTS

The sample included 224 patients, mean age 12.0 years (standard deviation = 4.9) and 58.9% female. Median LOS was 4 days (interquartile range 2-9). Most patients (71.4%) were prescribed opioids, 77.7% acetaminophen, 40.2% NSAIDs, and 37.5% multimodal analgesia. Opioid administration decreased over the study period; in contrast, there was an increase in multimodal analgesia administration. Opioid administration did not differ by sex, age, biliary versus non-biliary etiology, or race/ethnicity. In a multivariate regression model, lower albumin values ( P < 0.01) and younger age ( P < 0.05) were significant predictors of increased LOS, while MME48 was not associated with increased LOS.

CONCLUSIONS

Opioids were commonly administered; only 37.5% of children were administered multimodal analgesia during their hospitalization for AP. Opioid administration was not associated with increased LOS. Prospective studies are needed to determine optimal pain management for pediatric AP.

The overlap of medical child abuse and central sensitization in adolescents: An exploratory qualitative study

BACKGROUND

Both medical child abuse (MCA) and central sensitization (CS) may present in adolescents with chronic pain, disability, high healthcare utilization, and unremarkable medical evaluations.

OBJECTIVE

This study aimed to identify themes in the clinical narratives of adolescents with chronic pain that may help differentiate MCA from CS.

PARTICIPANTS AND SETTING

Participants were 28 adolescents (ages 13-18 years) with chronic pain referred to either the Child Abuse Pediatrics team or the Pediatric Pain Medicine team at a tertiary children's hospital between 2011 and 2019, and diagnosed with MCA or CS, respectively.

METHODS

This was a qualitative, retrospective study. Qualitative themes were derived through a process of inductive content analysis utilizing open coding, grouping, and secondary review by an interdisciplinary panel of experts. The relative prevalence of each code, theme, and overarching category was examined between groups to identify areas of convergence and divergence.

RESULTS

Several themes appeared to be more prevalent in the MCA group (n = 9) compared to the CS group (n = 19). These included sick identity, homeschooling, caregiver with mental health disorder, maternal catastrophizing, maternal misrepresentation, persistence in healthcare-seeking, mandated reports made, medical neglect, and unnecessary and harmful medical care.

CONCLUSIONS

This exploratory work identified themes from the clinical narratives of adolescents with chronic pain that may help differentiate MCA from CS. A visual reference, two illness scripts, and management recommendations are presented to aid pediatric providers in facilitating appropriate referrals for adolescents with chronic pain and disability out of proportion to diagnostic workup.

The impact of the COVID-19 pandemic on pain and psychological functioning in young adults with chronic pain

ABSTRACT

Data are equivocal on the consequences of COVID-19 pandemic on pain and well-being for individuals with chronic pain. Furthermore, little is known regarding its impact on the health of young adults with chronic pain. We conducted a longitudinal study to compare pain, psychological functioning, and substance use before and during the pandemic of 196 young adults with chronic pain. Participants aged 18 to 24 years (M = 21.1 years; 79.6% females) reported on pain, anxiety, depression, and substance use before (October 2018-August 2019) and during the pandemic (October 2020-November 2020), in addition to the assessment of COVID-19 exposure and its impact. Before the pandemic, young adults experienced mild-to-moderate pain intensity (M = 3.75, SD = 2.33) and pain interference (M = 3.44, SD = 2.69). Findings were that pain intensity, pain interference, and depression symptoms remained stable during the pandemic. In contrast, anxiety symptoms increased significantly (M = 8.21, SD = 5.84 vs M = 8.89, SD = 5.95, P = 0.04). Tobacco, alcohol, and cannabis use were unchanged. Mixed linear models revealed that COVID-19 exposure and impact were not associated with changes in pain intensity or interference, with female sex associated with increased pain intensity (β = 0.86, P = 0.02) and pain interference (β = 0.87, P = 0.02). Our findings indicated relative stability of pain symptoms experienced by young adults with chronic pain. However, the increases in anxiety highlight the need to facilitate treatment access for mental health services to mitigate downstream impact.

Health-related quality of life in children with Hirschsprung disease and children with functional constipation: Parent-child variability

BACKGROUND

Health-related quality of life (HRQOL) is an important outcome among children with Hirschsprung Disease (HD), but there are challenges in interpreting findings in previous studies owing to the choice of a comparator group and informant. We compared parent-proxy versus child self-report HRQOL in children with HD to children with functional constipation (FC) and examined predictors of HRQOL.

METHODS

Data of 126 children (5-18 years, 60.3% male, HD: n = 52, FC: n = 74) were acquired from the Pediatric Colorectal and Pelvic Learning Consortium. Demographics, clinical variables, HRQOL (Pediatric Quality of Life Inventory parent-proxy; child self-report) and functional outcomes (Baylor Continence Scale, Cleveland Clinic Constipation Scoring System) were collected.

RESULTS

Parent and child HRQOL was similar for both cohorts, with higher scores on physical functioning and lower scores on emotional and school functioning. For children with HD, demographics and clinical variables did not predict HRQOL in multivariable regression models. For children with FC, greater severity of constipation predicted lower HRQOL (parent-proxy: B = -2.14, p < 0.001; child: B = -1.75, p = 0.001). Parent-child agreement on HRQOL scores was poor to moderate in the HD group (intraclass correlations (ICC)=0.38-0.74), but moderate to excellent in the FC group (ICC=0.63-0.84). Furthermore, parents of children with FC and ≤10 years overestimated children's HRQOL (proportional OR 4.59 (1.63, 13.85); p = 0.004).

CONCLUSION

Clinical symptoms and demographic factors did not predict HRQOL among children with HD, highlighting the need to examine other biopsychosocial factors to understand long term HRQOL. Low parent-child HRQOL agreement in children with HD demonstrates the importance of obtaining parent and child perspectives.

LEVEL OF EVIDENCE

III.

TYPE OF STUDY

Prognosis study.

Health-Related Quality of Life in Pediatric Acute Recurrent or Chronic Pancreatitis: Association With Biopsychosocial Risk Factors

OBJECTIVES

Abdominal pain, emergency department visits, and hospitalizations impact lives of children with acute recurrent pancreatitis (ARP) and chronic pancreatitis (CP). Data on health-related quality of life (HRQOL) in this population, however, remains limited. We aimed to evaluate HRQOL in children with ARP or CP; and test biopsychosocial risk factors associated with low HRQOL.

METHODS

Data were acquired from the INternational Study Group of Pediatric Pancreatitis: In search for a cuRE registry. Baseline demographic and clinical questionnaires, the Child Health Questionnaire (measures HRQOL) and Child Behavior Checklist (measures emotional and behavioral functioning) were completed at enrollment.

RESULTS

The sample included 368 children (54.3% girls, mean age = 12.7years, standard deviation [SD] = 3.3); 65.2% had ARP and 34.8% with CP. Low physical HRQOL (M = 38.5, SD = 16.0) was demonstrated while psychosocial HRQOL (M = 49.5, SD = 10.2) was in the normative range. Multivariate regression analysis revealed that clinical levels of emotional and behavioral problems (B = -10.28, P  < 0.001), episodic and constant abdominal pain (B = 04.66, P = 0.03; B = -13.25, P < 0.001) were associated with low physical HRQOL, after accounting for ARP/CP status, age, sex, exocrine, and endocrine disease (F [9, 271] = 8.34, P < 0.001). Borderline and clinical levels of emotional and behavioral problems (B = -10.18, P < 0.001; B = -15.98, P < 0.001), and constant pain (B = -4.46, P < 0.001) were associated with low psychosocial HRQOL (F [9, 271] = 17.18, P < 0.001).

CONCLUSIONS

Findings highlight the importance of assessing HRQOL and treating pain and psychosocial problems in this vulnerable group of children.

Associations between insufficient sleep and prescription opioid misuse among high school students in the United States

STUDY OBJECTIVES

The aim of this study was to estimate the association between insufficient sleep and prescription opioid misuse among US high school students.

METHODS

Participants were 6,884 high school students who self-reported on sleep duration and prescription opioid misuse in the 2019 Youth Risk Behavior Survey. Sleep duration was categorized by the Youth Risk Behavior Survey according to the American Academy of Sleep Medicine guidelines as follows: recommended sleep duration (8-9 hours) vs insufficient sleep (< 8 hours). Participants also reported whether they had any prescription opioid misuse during their lifetime and whether they had prescription opioid misuse within the past 30 days.

RESULTS

Most (79.4%) participants reported sleeping less than 8 hours per night. Among all youth, 12.9% reported lifetime prescription opioid misuse and 6.2% reported current prescription opioid misuse. Prevalence of both lifetime and current opioid medication misuse was higher among those also reporting insufficient sleep compared to those reporting recommended sleep duration (14.3% vs 7.7%, P < .0001 for lifetime misuse and 6.6% vs 4.3%, P = .0091 for current misuse). In multivariate models, insufficient sleep was associated with an increased odds of lifetime prescription opioid misuse (adjusted odds ratios = 1.4; 95% confidence interval, 1.1-1.2; P = .006); however, we did not find an association between sleep duration and current prescription opioid misuse in multivariate analysis.

CONCLUSIONS

Sleep duration is associated with lifetime opioid misuse among US youth. Longitudinal studies are needed to test whether causal relationships exist, and to understand biobehavioral mechanisms that underlie associations between sleep deficiency and opioid misuse in adolescents.

CITATION

Groenewald CB, Rabbitts JA, Tham SW, Law EF, Palermo TM. Associations between insufficient sleep and prescription opioid misuse among high school students in the United States. J Clin Sleep Med. 2021;17(11):2205-2214.

Prescription Opioid Misuse and Sports-Related Concussion Among High School Students in the United States

STUDY OBJECTIVE

Concussion is highly prevalent in adolescents and associated with a higher risk of substance use. With the rising use of opioids among adolescents, one form of substance use of concern is the misuse of prescription opioids. This study aimed to examine the association between a history of sports-related concussion in the past year and current prescription opioid misuse among high school students in the United States.

SETTING

Secondary data analysis from the 2019 Youth Risk Behavior Survey.

PARTICIPANTS

Nationally representative sample of high school students (n = 7314).

DESIGN

Cross-sectional study.

MAIN MEASURES

Participants were asked whether they experienced any concussions related to sports or being physically active during the past 12 months and whether they had any prescription opioid misuse within the past 30 days.

RESULTS

Among this cohort, 14.0% reported sustaining a concussion in the past 12 months and 6% reported current prescription opioid misuse. The prevalence of prescription opioid misuse was higher among those with a history of concussion (9.9%) than among those without concussion (5.5%, P = .002). Controlling for covariates (sex, race/ethnicity, other substance use, depressive symptoms), the odds of prescription opioid misuse was 1.5 times higher for adolescents with concussion than those without (adjusted odds ratios [aOR] = 1.5; 95% CI, 1.0-2.3; P = .029).

CONCLUSION

Concussion was associated with prescription opioid misuse among the US youth, even after accounting for depressive symptoms and other substance use. Longitudinal studies are needed to test causal relationships and understand biobehavioral mechanisms that underlie associations between concussion and opioid misuse in adolescents.

Impaired School Functioning in Children With Chronic Pain: A National Perspective

OBJECTIVE

The purpose of this study was to determine the association between presence of chronic pain and school functioning among school-aged children (6 to 17 y) using the most recent United States national data.

MATERIALS AND METHODS

Secondary data analyses of the 2016-2017 National Survey of Children's Health. Parents (n=48,254) reported on whether their child had chronic pain over the past 12 months. Parents also reported on school functioning including (1) engagement with school, (2) number of school days missed, (3) problems at school, (4) repeating a grade, and (5) diagnosis of a learning disability. Children with chronic pain were compared with children without chronic pain using multivariate logistic regression models. We also stratified analysis according to age and sex.

RESULTS

In multivariate analyses, children with pain were more likely to have low school engagement (adjusted odds ratio [OR]: 1.4, 95% confidence interval [CI]: 1.0-1.9), be chronically absent (OR: 4.2, 95% CI: 3.0-5.8), have school-related problems (OR: 1.9, 95% CI: 1.5-2.3), repeat a grade (OR: 1.4, 95% CI: 1.0-2.0), and be diagnosed with a learning disability (OR: 1.6, 95% CI: 1.1-2.5). In stratified analyses, associations between chronic pain and school measures were strongest among adolescents (15 to 17 y of age) and males.

DISCUSSION

This study extends evidence linking chronic pain status to poorer school functioning in a large, national sample. Poor school functioning is a pressing public concern affecting children with chronic pain. Health care providers, educators, policymakers, and families should work together to ensure that needs are met for this vulnerable population.

Comorbid Sleep Disturbance in Adolescents with Functional Abdominal Pain

OBJECTIVE/BACKGROUND

Sleep disturbances have been commonly reported as comorbid in youth with pain conditions, but prior research specific to functional abdominal pain (FAP) is limited. This study describes individual factors associated with increased risk for sleep disturbance and characterizes the relationship between sleep disturbance and pain-related variables.

PARTICIPANTS

Participants included 278 adolescents (age 11 to 17 years, M age = 15 years; 89% Caucasian; 65% female) with FAP.

METHODS

Participants reported on sleep disturbances, abdominal pain severity, functional disability, somatic symptoms, and healthcare utilization.

RESULTS

Female adolescents reported greater sleep disturbance than male adolescents (t(276) = 5.52, p < .001, Cohen's d = 0.70) and increased age was associated with greater sleep disturbance (r =.20, p =.001). In hierarchical regressions controlling for age, sex, and abdominal pain, greater sleep disturbance was significantly associated with greater functional disability (β =.32), non-gastrointestinal somatic symptoms (β =.35), and emergency department visits (β =.29).

CONCLUSIONS

Results suggest that sleep disturbance is common and should be assessed in youth presenting with FAP and may be a potential target for intervention.

Brief Report: Associations Between Self-injurious Behaviors and Abdominal Pain Among Individuals with ASD-Associated Disruptive Mutations

Self-injurious behaviors (SIB) are elevated in autism spectrum disorder (ASD) and related genetic disorders, but the genetic and biological mechanisms that contribute to SIB in ASD are poorly understood. This study examined rates and predictors of SIB in 112 individuals with disruptive mutations to ASD-risk genes. Current SIB were reported in 30% of participants and associated with poorer cognitive and adaptive skills. History of severe abdominal pain predicted higher rates of SIB and SIB severity after controlling for age and adaptive behavior; individuals with a history of severe abdominal pain were eight times more likely to exhibit SIB than those with no history. Future research is needed to examine associations between genetic risk, pain, and SIB in this population.

Hybrid Cognitive-Behavioral Therapy Intervention for Adolescents With Co-Occurring Migraine and Insomnia: A Single-Arm Pilot Trial

OBJECTIVE

This study aimed to evaluate feasibility and acceptability of a hybrid cognitive-behavioral therapy intervention for adolescents with co-occurring migraine and insomnia.

BACKGROUND

Many youth with chronic migraine have co-occurring insomnia. Little research has been conducted to evaluate behavioral treatments for insomnia in youth with migraine.

DESIGN AND METHODS

We conducted a single-arm pilot trial to evaluate the feasibility and acceptability of delivering cognitive-behavioral therapy for insomnia to 21 youth (mean age 15.5, standard deviation 1.6) with co-occurring chronic migraine and insomnia. Adolescents completed up to 6 individual treatment sessions over 6 to 12 weeks, and 1 booster session 1 month later. Assessments included a prospective 7-day headache and sleep diary, and self-report measures of insomnia, sleep quality, sleep habits, and activity limitations at pre-treatment, immediate post-treatment, and 3-month follow-up.

RESULTS

Adolescents demonstrated good treatment adherence and families rated the intervention as highly acceptable. Preliminary analyses indicated improvements from pre-treatment to post-treatment in primary outcomes of headache days (M = 4.7, SD = 2.1 vs M = 2.8, SD = 2.7) and insomnia symptoms (M = 16.9, SD = 5.2 vs M = 9.5, SD = 6.2), which were maintained at 3-month follow-up (M = 2.7, SD = 2.8; M = 9.3, SD = 5.0, respectively). We also found improvements in secondary outcomes of pain-related activity limitations as well as sleep quality, sleep hygiene, and sleep patterns.

CONCLUSIONS

These preliminary data indicate that hybrid cognitive-behavioral therapy is feasible and acceptable for youth with co-occurring chronic migraine and insomnia. Future randomized controlled trials are needed to test treatment efficacy on migraine, sleep, and functional outcomes. ClinicalTrials.gov Identifier: NCT03137147.

The role of sleep deficiency in the trajectory of postconcussive symptoms in adolescents

Objective: To investigate the trajectory of sleep deficiency after concussion and examine its role as a predictor of postconcussive symptoms (PCS) over 3 weeks and at 3 months post-concussion. Design: This was a prospective pilot study of 29 adolescents recruited from a pediatric Emergency Department (69% female, mean age = 14.0 years, SD = 1.8) following a concussion. Methods: Adolescents completed questionnaire assessments at baseline, Weeks 1, 2, and 3 on PCS and sleep patterns. Concurrently, adolescents also completed a daily diary and wore an actigraph continuously to monitor sleep activity. At 3 months post-concussion, adolescents repeated questionnaire measures. Results: At enrollment, 53.6% reported severe PCS, and 12% maintained severe symptoms at 3 months. Over the first 3 weeks, sleep duration and daytime sleepiness gradually declined; however, insomnia symptoms remained unchanged. After accounting for age, sex and time since concussion, greater insomnia symptoms at enrollment were associated with more severe PCS at 3 weeks and 3 months (β = 1.17, p < .001). In contrast, sleep duration, efficiency, and waketime after sleep onset were not predictors. Conclusions: Study findings suggest that insomnia symptoms after concussion may provide a target for early intervention to reduce prolonged severity and duration of PCS.

The Use of Opioids for Treatment of Pediatric Neuropathic Pain: A Literature Review

Pediatric neuropathic pain is caused by a spectrum of disorders that are generally challenging to treat. Many of the underlying altered neurological processes are being elucidated through mechanistic studies. Few randomized control trials have evaluated the use of opioids for the treatment of adult neuropathic pain conditions, and there have been none in pediatric populations. With sparse data to provide guidance and an incomplete understanding of the underlying mechanisms, the use of opioids remains unclear. Our clinical experience and typical risk versus benefit considerations suggest a limited, if any, role for using opioids to treat pediatric neuropathic pain. In this literature review, we review the available adult and pediatric data and provide general guidance on this subject matter.

Gastrointestinal and Psychiatric Symptoms Among Children and Adolescents With Autism Spectrum Disorder

Individuals with autism spectrum disorder (ASD) are at heightened risk of psychiatric comorbidities across the lifespan, including elevated rates of internalizing, externalizing, and self-injurious behaviors. Identification of medical comorbidities that contribute to these concerns may elucidate mechanisms through which psychiatric concerns arise, as well as offer additional avenues for intervention. Gastrointestinal (GI) conditions are of particular interest, as they are prevalent among those with ASD, may share genetic or neurobiological etiologies with the core features of ASD, and are linked with psychiatric difficulties in the general population. In this paper, we draw on data from nearly 2,800 children and adolescents with ASD within the Simons Simplex Collection to characterize the unique contributions of (1) autism symptoms, (2) psychosocial factors (child's age, sex, verbal and nonverbal IQ, adaptive behavior, race, and household income), and (3) GI concerns with respect to multiple psychiatric outcomes. Multiple regression models revealed unique contributions of ASD symptoms and multiple psychosocial factors such as verbal IQ, adaptive behavior, and family income to internalizing, externalizing, and self-injurious behavior. In general, higher levels of psychiatric symptoms were associated with more ASD symptoms, higher verbal IQ, lower adaptive behavior skills, and lower family income. Furthermore, levels of GI symptoms accounted for unique variance in psychiatric outcomes over and above these other factors, linking increased GI problems with increased psychiatric symptoms in children with ASD. Taken together, results indicate that the presence and quantity of GI symptoms should be considered when evaluating psychiatric and behavioral concerns among children with ASD, and that treatment of GI conditions may be an important component in alleviating a broad array of mental health concerns in this group.

Current pain management strategies for patients with erythromelalgia: a critical review

Erythromelalgia (EM) is a rare disorder characterized by erythematous, warm, painful extremities, which is often precipitated by cold conditions. The pathophysiology of EM is incompletely understood. Recent investigations have identified sodium channelopathy as a genetic cause for this pain condition, classified as primary inherited EM. Other subtypes are idiopathic EM and secondary EM. The management of pain in EM is challenging as no single therapy has been found to be effective. There is varying response to pharmacotherapy and significant variability within this clinical population, resulting in a stepwise trial and error approach. Consequently, EM is often associated with poorer health-related quality of life with higher morbidity. There is currently no consensus or guidelines on management of pain in EM. This is a review of the literature on management of pain using pharmacologic, procedural intervention and nonpharmacologic treatment in children and adults with EM.

Between fire and ice: refractory hypothermia and warmth-induced pain in inherited erythromelalgia

Inherited erythromelalgia (IEM) is a well-described pain disorder caused by mutations of sodium channel Na_v1.7, a peripheral channel expressed within dorsal root ganglion and the sympathetic ganglion neurons. Clinically, IEM is characterised by paroxysmal attacks of severe pain, usually in the distal extremities, triggered by warmth or exercise. Pain is not adequately treated by existing pharmacological agents. Individuals with IEM classically cool their limbs for relief, in some cases resulting in tissue injury. We describe a patient from a family with IEM due to the L858F mutation of Na_v1.7 who presented with refractory hypothermia due to overcooling. This presentation of refractory hypothermia necessitating warming strategies, complicated by severe warmth-induced pain, posed a substantial therapeutic challenge. We report our experience in overcoming hypothermia lasting 3 weeks in a child with IEM, discuss possible pathophysiological mechanisms underlying this unusual complication and suggest potential therapeutic interventions.

A population-based study of quantitative sensory testing in adolescents with and without chronic pain

Quantitative sensory testing (QST) has been used to characterize pain sensitivity in individuals with and without pain conditions. Research remains limited in pediatric populations, hindering the ability to expand the utility of QST toward its potential application in clinical settings and clinical predictive value. The aims of this study were to examine pain sensitivity using QST in adolescents with chronic pain compared to adolescents without chronic pain and identify predictors of pain sensitivity. A population-based study conducted from 2010 to 2011 provided data on 941 adolescents, 197 were classified as having chronic pain and 744 were classified without chronic pain. Self-reported data on pain characteristics, psychological functioning, and QST responses were examined. The findings revealed lower pressure pain threshold and tolerance on the trapezius (P's = 0.03) in adolescents with chronic pain compared to adolescents without chronic pain, but no differences on heat or cold-pressor pain tasks. Female sex (P's = 0.02) and poorer psychological functioning (P's = 0.02) emerged as significant predictors of greater pain sensitivity across all pain modalities. Exploratory analyses revealed several associations between clinical pain characteristics and QST responses within the chronic pain cohort. Findings from this large pediatric sample provide comprehensive data that could serve as normative data on QST responses in adolescents with and without chronic pain. These findings lay the groundwork toward developing future QST research and study protocols in pediatric populations, taking into consideration sex and psychological distress.

Prevalence of overactive bladder syndrome (OABS) among women with gynaecological problems and its risk factors in a tertiary hospital, Negeri Sembilan, Malaysia: Implication for primary healthcare providers

OBJECTIVE

The objective of this paper was to determine the prevalence of overactive bladder syndrome (OABS) and its risk factors among patients with other gynaecological problems.

METHODS

This study was conducted on women aged more than 18 years who attended the gynaecology clinic for various diagnoses other than urinary problems at a tertiary hospital in Negeri Sembilan, Malaysia, for a period of 6 months. Data on patient's profile, symptoms and risk factors for overactive bladder (OAB) were prospectively collected using a structured questionnaire adapted from ICIQ (international consultation on incontinence questionnaire). Exclusion criteria included patients with confirmed diagnosis of stress incontinence or OAB, neurological impairment, gynaecological malignancy and those with a previous history of pelvic radiation. Chi-square test and logistic regression test were used in the statistical analysis. We presented the odds ratio (OR) and 95% confidence interval for each of the OAB symptoms with p-value of 0.05.

RESULTS

The prevalence of OAB among the patients (n = 573) in this study was 19.1%. History of giving births to macrosomic babies and presence of utero-vaginal prolapse (UVP) were shown to be significantly associated with OAB in the multivariate analysis. Other factors were advanced age, high parity and menopausal for more than 5 years. More than half of the patients with the symptoms of OAB did not seek treatment, as they did not think it is necessary.

CONCLUSION

It is found that the prevalence of OAB is similar with many other studies conducted elsewhere. It was found to be multifactorial, but was highly significantly related with the presence of UVP, especially cystocoele and history of giving births to macrosomic babies.

Subjective and objective assessment of sleep in adolescents with mild traumatic brain injury

There is increased recognition that sleep problems may develop in children and adolescents after mild traumatic brain injury (mTBI). However, few studies have utilized both subjective and objective measures to comprehensively assess sleep problems in the pediatric population following the acute post-TBI period. The aims of this study were to compare sleep in adolescents with mTBI to healthy adolescents using subjective and objective measures, and to identify the clinical correlates associated with sleep problems. One hundred adolescents (50 adolescents with mTBI recruited from three to twelve months post-injury and 50 healthy adolescents) completed questionnaires assessing sleep quality, depression, and pain symptoms, and underwent 10 day actigraphic assessment of sleep patterns. Adolescents with mTBI reported poorer sleep quality and demonstrated significantly shorter actigraphic-measured sleep duration, poorer sleep efficiency, and more wake time after onset of sleep, compared with healthy adolescents (all, p<0.05). For both groups of adolescents, poorer self-reported sleep quality was predicted by greater depressive symptoms. Poorer actigraphic sleep efficiency was predicted by membership in the mTBI group after controlling for age, sex, depressive symptoms, and presence of pain. Our findings suggest that adolescents may experience subjective and objective sleep disturbances up to one year following mTBI. These findings require further replication in larger samples. Additionally, research is needed to identify possible mechanisms for poor sleep in youth with mTBI.

Persistent pain in adolescents following traumatic brain injury

Traumatic brain injury (TBI) is a leading cause of pediatric disability. Although persistent pain has been recognized as a significant postinjury complication, there is a paucity of data concerning the postinjury pain experience of youth. This study aimed to examine the prevalence of persistent pain in adolescents after TBI, identify risk factors for pain, and evaluate the impact of pain on adolescent health-related quality of life. Participants included 144 adolescents with mild to severe TBI who were followed over 36 months after injury. At 3-, 12-, 24-, and 36-month assessments, measures of pain intensity, depression, posttraumatic stress disorder, and health-related quality of life were completed by adolescents. Findings demonstrated that 24.3% of adolescents reported persistent pain (defined as usual pain intensity ≥3/10) at all assessment points after TBI. Female sex (odds ratio = 2.73, 95% confidence interval = 1.12-6.63) and higher levels of depressive symptoms at 3 months after injury (odds ratio = 1.26, 95% confidence interval = 1.12-1.43) were predictors of persistent pain at 36 months. Furthermore, mixed linear models indicated that early pain experience at 3 months following TBI was associated with a significantly poorer long-term health-related quality of life.

PERSPECTIVE

This is the first study to examine the prevalence of persistent pain over long-term follow-up in adolescents after TBI and its impact on health-related quality of life. These findings indicate that adolescents with TBI may benefit from timely evaluation and intervention to minimize the development and impact of pain.

Longitudinal course and risk factors for fatigue in adolescents: the mediating role of sleep disturbances

OBJECTIVES

This study (1) examines fatigue over 1 year in adolescents with chronic pain (n = 61) and depressive disorders (n = 51) compared with healthy adolescents (n = 60), (2) identifies longitudinal risk factors, and (3) tests sleep disturbances as a mediator between depression and fatigue.

METHODS

Adolescents completed questionnaires at baseline, 6, and 12 months. Mixed effects models examined associations between risk factors and fatigue; structural equation modeling assessed contemporaneous and longitudinal mediation.

RESULTS

Results revealed fatigue persisted at 1 year follow-up, with adolescents in the clinical samples experiencing greater fatigue than healthy youth at all time points (ps < .001). Age, baseline depression, and baseline sleep disturbances predicted longitudinal fatigue for the total sample (ps < .05), with variation in predictors by subgroup. Sleep quality mediated the contemporaneous effects of depression on fatigue in the clinical samples (ps < .05).

CONCLUSIONS

Findings underscore the longitudinal course of fatigue and suggest that improving sleep disturbances may reduce fatigue in clinical samples.

Current smoking as a predictor of chronic musculoskeletal pain in young adult twins

Chronic pain is common during adolescence and young adulthood and is associated with poor quality of life, depression, and functional disability. Recognizing that chronic pain has significant consequences, it is important to identify modifiable health behaviors that may place young adults at risk for chronic pain. This study examines associations between chronic musculoskeletal pain and smoking in young adult twins (n = 1,588, ages 18-30) participating in a statewide twin registry. Twins completed questionnaires assessing smoking, mood (anxiety, depressive symptoms, and stress), and chronic musculoskeletal pain. Analyses examined associations between chronic pain and smoking, particularly the role of genetics/shared familial factors and psychological symptoms. As predicted, results revealed a near-2-fold increased risk for chronic musculoskeletal pain in twins who currently smoked compared to nonsmokers, even when accounting for psychological factors. Results of within-pair analyses were only minimally attenuated, suggesting that associations between smoking and chronic musculoskeletal pain are better accounted for by nonshared factors than by shared familial factors/genetic effects. Future twin research is needed to identify what nonshared factors (eg, attitudes, direct effects of smoking on pain) contribute to these associations to further understand comorbidity. Longitudinal studies and recruitment of participants prior to smoking initiation and chronic pain onset will better identify causal associations.

PERSPECTIVE

This article describes associations between musculoskeletal pain and smoking in young adult twins, taking into account psychological symptoms. Findings highlight the importance of nonshared factors in associations between pain and smoking and the need to explore the roles of lifestyle, individual attitudes, and direct effects of smoking on pain.

The longitudinal course, risk factors, and impact of sleep disturbances in children with traumatic brain injury

This study aimed to examine the prevalence and trajectory of sleep disturbances and their associated risk factors in children up to 24 months following a traumatic brain injury (TBI). In addition, the longitudinal association between sleep disturbances and children's functional outcomes was assessed. This was a prospective study of a cohort of children with TBI and a comparison cohort of children with orthopedic injury (OI). Parental reports of pre-injury sleep disturbances were compared to reports of post-injury changes at 3, 12, and 24 months. Risk factors for sleep disturbances were examined, including severity of TBI, presence of psychosocial problems, and pain. Sleep disturbances were also examined as a predictor of children's functional outcomes in the areas of adaptive behavior skills and activity participation. Both cohorts (children with TBI and OI) displayed increased sleep disturbances after injury. However, children with TBI experienced higher severity and more prolonged duration of sleep disturbances compared to children with OI. Risk factors for disturbed sleep included mild TBI, psychosocial problems, and frequent pain. Sleep disturbances emerged as significant predictors of poorer functional outcomes in children with moderate or severe TBI. Children with TBI experienced persistent sleep disturbances over 24 months. Findings suggest a potential negative impact of disturbed sleep on children's functional outcomes, highlighting the need for further research on sleep in children with TBI.

Nosocomial contamination of laryngoscope handles: challenging current guidelines

BACKGROUND

Laryngoscope blades are often cleaned between cases according to well-defined protocols. However, despite evidence that laryngoscope handles could be a source of nosocomial infection, neither our institution nor the American Society of Anesthesiologists has any specific guidelines for handle disinfection. We hypothesized that laryngoscope handles may be sufficiently contaminated with bacteria and viruses to justify the implementation of new handle-cleaning protocols.

METHODS

Sixty laryngoscope handles from the adult operating rooms were sampled with premoistened sterile swabs. Collection was performed between cases, in operating rooms hosting a broad variety of subspecialty procedures, after the room and equipment had been thoroughly cleaned for the subsequent case. Samples from 40 handles were sent for aerobic bacterial culture, and antimicrobial susceptibility testing was performed for significant isolates. Samples from 20 handles were examined for viral contamination using a polymerase chain reaction assay that detects 17 respiratory viruses.

RESULTS

Of the 40 samples sent for culture, 30 (75%) were positive for bacterial contamination. Of these positive cultures, 25 (62.5%) yielded coagulase-negative staphylococci, seven (17.5%) Bacillusspp. not anthracis, three (7.5%) alpha-hemolytic Streptococcusspp., and one each (2.5%) of Enterococcusspp., Staphylococcus aureus(S. aureus), and Corynebacteriumspp. No vancomycin-resistant enterococci, methicillin-resistant S. aureus, or Gram-negative rods were detected. All viral tests were negative.

CONCLUSION

We found a high incidence of bacterial contamination of laryngoscope handles despite low-level disinfection. However, no vancomycin-resistant enterococci, methicillin-resistant S. aureus, Gram-negative rods, or respiratory viruses were detected. Our results support adoption of guidelines that include, at a minimum, mandatory low-level disinfection of laryngoscope handles after each patient use.

The pregnancy outcome of acyanotic heart disease

OBJECTIVE

To study the pregnancy outcome of women with acyanotic heart disease.

METHOD

This is a retrospective study from a tertiary referral centre in a developing country over a period of 3 years.

RESULTS

There were a total of 19,151 deliveries where 143 cases had heart disease in pregnancy, all of which were acyanotic, giving an incidence of 0.7%. Fifty-one (38.4%) of these were congenital whereas 82 (61.6%) were acquired. There was no cyanotic heart lesion during this study period. The fetal and maternal outcome of the women with heart disease (study group) was compared with the general obstetric population in the Unit (control group) using the Chi-squared test. Ninety-two percent in the study group were asymptomatic (NYHA Class I). The age distribution were no different except in the < 20 years interval where there were significantly fewer in the study group. More women with heart disease were primiparous and fewer were multiparous as compared with the controls. There was no significant difference in the rate of induction of labour (9.8% vs 11.8%). The use of epidural analgesia was significantly higher in the study group (49% vs 13%) as was the instrumental delivery rates (35.7% vs 5.7%) when compared with the controls. The caesarean section rate was no different. The mean gestation of babies born to mothers with heart disease was 38.2 weeks. Significantly fewer babies were in the 3.0-3.5 kg weight interval and more in the 2.5-3.0 kg interval. However, this did not alter the perinatal mortality rates which was not significantly different (15.3 vs 14.0 per thousand).

CONCLUSION

The fetal and maternal outcome in women with acyanotic heart disease was favourable. It is advocated that the management of these cases should be multidisciplinary to optimise care for these patients.

Formation of vasculo-syncytial membranes in the human placenta

Vasculo-syncytial membranes are localised areas of the placental villous membrane where the thickness of the barrier separating the maternal and fetal circulations is reduced to as little as 1-2 microns. Consequently, they are believed to be important sites for diffusional exchange. The morphological appearances suggest that they are caused by the obtrusion of locally dilated segments of the fetal capillaries into the trophoblast layer. This study sought quantitative evidence for the hypothesis by performing stereological analyses on vasculo-syncytial membranes at the electron microscopic level. The results confirmed that a strong relationship existed between the thickness of the capillary endothelium and that of the overlying stromal and trophoblastic tissue at these sites (r = 0.47, P < 0.001), indicating that some asymmetrical stretching or remodelling of the capillary wall was involved. Comparisons were also made between the thickness of the trophoblastic, stromal and endothelial components of the villous membrane in villi obtained from the central and from the peripheral parts of placental lobules, where vasculo-syncytial membrane formation is accentuated. The mean thickness of each component was lowest in the samples from the peripheral region, although the differences only proved to be statistically significant for the stromal layer (P = 0.01). Both sets of data lend quantitative support to the hypothesis that vasculo-syncytial membrane formation is the result of obtrusion of locally dilated segments of the fetal capillaries. The way in which this may be linked to changes in the dynamics of the fetal circulation as gestation advances is discussed.