Tourette syndrome research highlights from 2022

This is the ninth yearly article in the Tourette Syndrome Research Highlights series, summarizing selected research reports from 2022 relevant to Tourette syndrome. The authors briefly summarize reports they consider most important or interesting.

Fine Motor Skills in Children with Tourette Syndrome and their Unaffected First-degree Siblings

Background

The exact etiology of Tourette Syndrome (TS) remains unclear, making the search for impaired neuropsychological functions possibly connected to the underlying cause of TS as important as it is challenging. One neuropsychological domain of interest is fine motor skills.

Method

This study compared fine motor skill performance on the Purdue Pegboard Task (PPT) in 18 children with TS, 24 unaffected first-degree siblings and 20 controls. A set of screening questionnaires was administered to determine comorbid psychiatric illness.

Results

Children with TS, their siblings and controls did not differ significantly in fine motor skills as measured with the PPT. Performance on the PPT was not correlated with tic severity; however, we found an inverse correlation with severity of attention-deficit/hyperactivity disorder (ADHD) symptoms, as assessed by parent reported ADHD symptoms. Children with TS were found to have significantly higher parent reported ADHD symptoms compared to controls, yet only two out of the 18 participants had been diagnosed with ADHD.

Conclusion

This study suggests that fine motor skill impairment in children with TS may be more strongly correlated with comorbid ADHD than to TS and tics.

Headache in Children and Adolescents: The Association between Screen Time and Headache within a Clinical Headache Population

BACKGROUND

More than half of children and adolescents have experienced headache within the last 3 months. Several risk factors for headache have been identified, including obesity and lack of sleep. The association between screen time and headache in children and adolescents is sparsely investigated. The aim of this study was to assess this association and evaluate if it varied according to headache diagnosis.

METHOD

This cross-sectional study was performed at the tertiary pediatric outpatient clinic for headache at Herlev University Hospital. A total of 139 participants who answered a questionnaire on lifestyle factors and their daily living were included. Diagnoses of migraine and tension-type headache (TTH) were made according to the International Classification of Headache Disorders-3. Children with both migraine and TTH were allocated to a mixed headache group. We differentiated between total, leisure, and school-related screen time.

RESULTS

The mean age was 13.20 ± 3.38 years and 53.2% were girls. Note that 25.2% were diagnosed with migraine without aura, 23.0% migraine with aura, 28.1% TTH, 15.8% mixed headache, and 7.9% had an unclassified headache diagnosis at the time of inclusion. There was no statistically significant difference in screen time across the five headache groups. An association between screen time and headache frequency was found in children with migraine with aura.

CONCLUSION

In this study, we investigated the association between screen time and headache in children and adolescents. More screen time was associated with more frequent headaches in children with migraine with aura. Future prospective studies are needed to determine the causality of this association.

Long-term employment, education, and healthcare costs of childhood and adolescent onset of epilepsy

OBJECTIVE

Childhood- and adolescent-onset epilepsy may have a significant impact on long-term educational and vocational status, which in turn has consequences for individuals' socioeconomic status. We estimated the factual long-term socioeconomic consequences and healthcare costs of individuals with diagnosed epilepsy.

METHODS

The prospective cohort study included Danish individuals with epilepsy onset before the age of 18 years, diagnosed between 2002 and 2016. Healthcare costs and socioeconomic data were obtained from nationwide administrative and health registers. The prediction was made with a general estimating equation (GEE). A total of 15,329 individuals were found with the diagnosis during this period and were followed until the age of 30 years. These were compared with 31,414 controls. We used 30 years as this represent an age where most has finalized their education, and as such represent the final educational level. Patients and their controls were subdivided into debut age groups of 0-5 and 6-18 years. Individuals were matched for age, gender, and residential location.

RESULTS

Compared with control groups, patients with epilepsy at the age of 30 years tended to have the following: 1) parents with lower educational attainment; 2) a significantly lower educational level when controlling for parental education attainment; 3) lower grade-point averages; 4) a lower probability of being in employment and lower income, even when transfer payments were considered; and 5) elevated healthcare costs, including those for psychiatric care. It was also noted that the long-term educational consequences for patients with epilepsy were associated with parental educational level. Differences were more pronounced for those with early (0-5 years) rather than later (6-18 years) onset epilepsy.

CONCLUSIONS

Epilepsy is associated with severe long-term socioeconomic consequences: lower educational level, school grades, employment status, and earned income. The presence of epilepsy is associated with parental educational level.

LIMITATIONS

SIGNIFICANT OUTCOMES.

[Melatonin for children with insomnia]

Treatment for insomnia with melatonin (MT) in children and adolescents aged 0-17 years has doubled since 2011. The efficacy and safety profile for MT in children has not been determined. Recent clinical trials indicate, that MT only has a clinical effect on sleep latency, not on total sleep time. Furthermore, it has emerged, that proper sleep hygiene can cure the sleep problem in 50% of the children. Typically, the safety evaluation only entails an unclassified report of adverse events. Two long-term studies investigate and dispel the potential influence of MT on puberty.