Introduction. Tension-type headache (TTH) represents a widespread and recurrent disease in adults, children, and adolescents, adversely affecting the quality of life, learning achievements, and social functioning. In recent publications, a high incidence of comorbid disorders in patients with TTH is discussed, in particular sleep disorders. The aim of the study was to assess the nature and prevalence of sleep disorders in children and adolescents with frequent episodic TTH and chronic TTH. Materials and methods. One hundred fifty patients aged from 8 years to 16 years 11 months with TTH were examined. Of them, 91 (49 boys, 42 girls) had frequent episodic TTH, 59 (26 boys, 33 girls) had chronic TTH. There was used Sleep Disturbance Scale for Children including 26 questions for parents. Results. The present study confirms the high incidence of sleep disorders among TTH children and adolescents. TTH was diagnosed in 129 (86.0%) out of 150 patients. The most frequently diagnosed varying degrees of severity (clinically relevant and borderline, when assessing sleep disorders in children) were insomnia (disorders of initiating and maintaining sleep) - in 65.3% of patients (including 60.4% with frequent episodic TTH and 72.9% with chronic TTH), excessive somnolence - in 74.7% (67.1% and 86.4%), sleep breathing disorders - in 26.7% (23.1% and 32.2%), disorders of arousal/nightmares - in 46.0% (42.9% and 50.8%), sleep-wake transition disorders - in 65.3% (67.1% and 62.7%), sleep hyperhidrosis - in 31.3% (26.4% and 39.0%). Thus, all sleep disorders (except for sleep-wake transition disorders) were significantly more common among the patients with chronic TTH. At the same time, in the subgroup of patients with TTH and any sleep disorders, significantly more prominent indicators of the frequency, the intensity of TTH and its negative impact on the daily activity were revealed, compared to patients with TTH lacking sleep disorders. Conclusion. The results of the assessment of children and adolescents with TTH show that when planning preventive therapy for TTH and evaluating its results, not only main clinical characteristics of TTH should be taken into account, but also the manifestations and severity of comorbid disorders, including sleep disorders observed in most patients with TTH. The revealed prevalence of various sleep disorders in the subgroup of patients with chronic TTH confirms that sleep disorders and anxiety disorders refer to significant risk factors for the transition of TTH to a chronic form, and such patients need more active multimodal treatment.
