Resting-state functional connectivity, cognition, and fatigue in response to cognitive exertion: a novel study in adolescents with chronic fatigue syndrome.

Emerging evidence suggests that central nervous system dysfunction may underlie the core symptoms of Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) in adults, such as cognitive disturbance, fatigue and post-exertional malaise. Research into brain dysfunction in the pediatric CFS/ME context, however, is severely lacking. It is unclear whether the adolescent CFS/ME brain functions differently compared with healthy peers, particularly in situations where significant mental effort is required. This study used resting-state functional MRI in a novel repeated-measures design to evaluate intrinsic connectivity, cognitive function, and subjective fatigue, before and after a period of cognitive exertion in 48 adolescents (25 CFS/ME, 23 healthy controls). Results revealed little evidence for a differential effect of cognitive exertion in CFS/ME compared with controls. Both groups demonstrated a similar rate of reduced intrinsic functional connectivity within the default mode network (DMN), reduced sustained attentional performance, slower processing speed, and increased subjective fatigue as a result of cognitive exertion. However, CFS/ME adolescents consistently displayed higher subjective fatigue, and controls outperformed the CFS/ME group overall on cognitive measures of processing speed, sustained attention and new learning. No brain-behavior relationships were observed between DMN connectivity, cognitive function, and fatigue over time. These findings suggest that effortful cognitive tasks may elicit similar levels of energy expenditure across all individuals in the form of reduced brain functioning and associated fatigue. However, CFS/ME may confer a lower starting threshold from which to access energy reserves and cognitive resources when cognitive effort is required.

Epidemiology of paediatric chronic fatigue syndrome in Australia.

OBJECTIVE: To estimate the paediatrician-diagnosed incidence of chronic fatigue syndrome (CFS) in Australia, and describe demographic and clinical features, as well as approaches to diagnosis and management. METHODS: The Australian Paediatric Surveillance Unit facilitates monthly national surveillance of uncommon conditions seen by paediatricians. Data from young people aged <18 years diagnosed with CFS were collected. Incidence was estimated based on new cases reported from April 2015 to April 2016. RESULTS: A total of 164 cases of newly diagnosed CFS in young people aged 4-17 years were identified for inclusion. The estimated national incidence for children aged 4-9 years was 0.25 per 100 000 per annum. In children aged 10-17 years, the estimated incidence of paediatrician-diagnosed cases for Victoria (17.48 per 100 000) was substantially greater than other Australian states (range 1.31-5.51 per 100 000). Most cases were female and Caucasian, most commonly presenting after an infectious illness with symptoms gradual in onset. The majority were diagnosed at least 13 months after symptom onset. Symptoms, associations, investigations and management strategies were highly variable. CONCLUSIONS: Current findings suggest that, consistent with other countries, the Australian incidence of CFS in children aged <10 years is very low. In contrast, the national incidence of CFS in older children and adolescents (aged 10-17 years) is more unclear, with marked variability between geographical regions apparent. This may be due to variation in service accessibility and clinician understanding of CFS. Accordingly, national initiatives to improve equity of care for children with CFS may be required.

The efficacy of the OSA-18 as a waiting list triage tool for OSA in children.

PURPOSE: Sleep disordered breathing (SDB) is common in children, resulting in extensive waiting lists for specialist clinics. There is an urgent need for a valid method of triaging patients and the OSA-18, a disease-specific tool, is an attractive candidate for this role. We aimed to examine the OSA-18 as a measurement tool in detail and to determine whether the score or aspects of it could be used as a screening tool for SDB in children. METHODS: Retrospective analysis of 582 children (6 months to 16.4 years)-216 underwent overnight PSG and 366 overnight oximetry. Confirmatory factor analysis (CFA) and exploratory factor analysis (EFA) were conducted. Receiver operating characteristic curve analysis assessed the diagnostic accuracy of the factors for the presence of OSA. Rasch analysis was used to assess the structure of the items (1-18) and categories of response (Likert scale). RESULTS: The CFA with a forced five-factor structure, revealed three factors with Eigenvalues >1, and explained 73.7 % of the variance. EFA resulted in a two-factor structure, explaining 60.3 % of the variance. Assessment of sensitivity and specificity showed a high false-positive rate, irrespective of the factor structure tested. Rasch analysis showed poor discrimination between adjacent categories on the Likert scale. CONCLUSION: This study confirmed that the predictive value of the OSA-18 for SDB severity is weak. Some questions perform better than others statistically, and the seven categories of response introduce significant statistical noise, raising the possibility that modification of the OSA-18 may improve its performance in the prediction of OSA severity.

How is paediatric chronic fatigue syndrome/myalgic encephalomyelitis diagnosed and managed by paediatricians? An Australian Paediatric Research Network Study.

AIM: The diagnosis and management of paediatric chronic fatigue syndrome/myalgic encepnalomyelitis (CFS/ME) represent ongoing challenges for paediatricians. A better understanding of current approaches at a national level is important in informing where research and education could improve treatment outcomes. We aimed to examine current diagnosis and management practices for CFS/ME by Australian paediatricians. METHOD: An online survey was sent to members of the Australian Paediatric Research Network. The primary outcomes of interest included diagnostic criteria used, medical investigations and management practices in paediatric CFS/ME. RESULTS: One hundred seventy-eight (41%) of 430 eligible paediatricians responded, with 70 of the 178 (39%) reporting that they diagnose and manage CFS/ME as part of their practice. Medical investigations used for diagnosis were variable. Conditions that more than half of the paediatricians reported as commonly co-occurring (i.e. present in >50% of cases) included somatisation disorders, anxiety, depression and fibromyalgia. There was wide variation in behavioural and pharmacological management strategies but most paediatricians commonly engaged a school teacher, physiotherapist and/or psychologist as part of their management. CONCLUSION: The diagnostic and management practices of paediatricians for CFS/ME within Australia vary widely. This likely reflects a paucity of paediatric-specific guidelines, together with limited evidence to guide best practice and limited training in this area. There is a need for guidance and education for the diagnosis and management of paediatric CFS/ME in Australia.

Paediatric chronic fatigue syndrome: complex presentations and protracted time to diagnosis.

AIM: The diagnosis and management of paediatric chronic fatigue syndrome (CFS) remain ongoing challenges for paediatric clinicians, particularly given its unknown aetiology and the little research on effective treatments for this condition. The aim of this study was to describe the presenting features of new patients attending a specialist chronic fatigue clinic at a tertiary-level Australian children's hospital. METHOD: The medical records of all patients with an initial consultation at the chronic fatigue clinic over a 12-month period were reviewed using a standardised data collection template. Functional impact was based on school attendance and classified according to the National Institute of Health and Clinical Excellence guidelines (2007). RESULTS: A total of 99 patients attending the clinic were identified. Of these, 59 were diagnosed with CFS. Median age was 15.4 years with almost two-thirds of patients of female sex. Median time between symptom onset and diagnosis was 15.5 months. There was a high occurrence of fatigue, sleep disturbance, pain, postexertional malaise, and autonomic and cognitive symptoms in the group. The functional impact of CFS was classified as mild for 20%, moderate for 66% and severe for 14% of patients. CONCLUSIONS: Most young people diagnosed with CFS experience symptoms for a protracted period, with considerable functional impact prior to initial tertiary service consultation. This audit has identified important areas for research, practice development and education in relation to the management of patients with CFS.

Severe versus Moderate criteria for the new pediatric case definition for ME/CFS.

The new diagnostic criteria for pediatric ME/CFS are structurally based on the Canadian Clinical Adult case definition, and have more required specific symptoms than the (Fukuda et al. Ann Intern Med 121:953-959, 1994) adult case definition. Physicians specializing in pediatric ME/CFS referred thirty-three pediatric patients with ME/CFS and 21 youth without the illness. Those who met ME/CFS criteria were separated into Severe and Moderate categories. Significant differences were found for symptoms within each of the six major categories: fatigue, post-exertional malaise, sleep, pain, neurocognitive difficulties, and autonomic/neuroendocrine/immune manifestations. In general, the results showed participants who met the Severe ME/CFS criteria reported the highest scores, the Moderate ME/CFS group show scores that were a little lower, and the control group evidenced the lowest scores. Findings indicate that the Pediatric Case Definition for ME/CFS can distinguish between those with this illness and controls, and between those with Severe versus Moderate manifestations of the illness.

Undergraduate nursing students' attitudes towards smoking health promotion.

Despite the fact that nurses have a key role in health promotion, many continue to smoke at much the same rate as the general population. This paper investigates the influence of smoking status, gender, age, stage of education, and smoking duration on undergraduate nursing students' attitudes towards smoking health promotion. The study took place in one university's School of Nursing in Victoria, Australia. Respondents completed the Smoking and Health Promotion instrument. Researchers obtained ethics approval prior to commencing the study. Smoking status was the main factor that affected respondents' attitudes towards smoking health promotion, with age and education stage having a minor effect, and gender and smoking duration not significant. Nurses have an important role in modeling non-smoking behaviors for patients. There needs to be consistency between personal and professional beliefs for nurses to properly engage in smoking health promotion. The findings have implications for undergraduate nursing education curricula, nursing practice and research, and these are discussed.

Cognitive dissonance and undergraduate nursing students' knowledge of, and attitudes about, smoking.

BACKGROUND: Smoking is a major cause of morbidity and mortality. Although nurses have an important role in health promotion, and are well placed to see the harmful effects of tobacco smoking, studies suggest that they smoke at much the same rate as the general population. AIM: The aim of this paper is to report a study examining undergraduate nursing students' knowledge about the impact of smoking on health, and their attitudes towards smokers and smoking. METHODS: The study took place in 2001, using a non-probability sample of 366 undergraduate nursing students from an Australian university. Participants completed the Smoking and Health Promotion instrument. Festinger's theory of cognitive dissonance provided an explanatory framework for the findings. RESULTS: Most respondents who were still smoking began the habit while in high school. Students had greater generic than specialized knowledge about the effects of smoking on health, and there was no significant difference between second and third year students' knowledge. Those who still smoked had less favourable attitudes towards smoking-related health promotion than those who had never smoked or stopped smoking. Non-smokers were more supportive of non-smokers' rights than those who continued to smoke, while those who had stopped smoking were undecided. There was minimal association between levels of knowledge and attitudes about being sensitive to smoking-related health risks. CONCLUSION: The findings have implications for both high school education and undergraduate nursing education, and for the recruitment of students to undergraduate nursing programmes. More attention needs to be given in undergraduate nursing programmes to smoking and smoking-related illnesses, and to nurses' role in smoking health promotion.