Increased urinary 6-hydroxymelatoninsulfate levels in attention deficit hyperactivity disorder diagnosed children and adolescent.

There are some studies in attention deficit hyperactivity disorder (ADHD) which note altered circadian rhythms, suggesting abnormalities in melatonin physiology. In order to better characterize the possible melatonin alteration in ADHD, in this study we aimed to detect daytime, nighttime and 24 h levels of 6-hydroxymelatoninsulfate (6-OH MS) in the patients diagnosed with ADHD. Twenty-seven patients between 6 and 16 years-old, who had been diagnosed initially with ADHD, but without other physical and psychiatric disease history and who had not taken psychotropic pharmacotherapy for six months, plus 28 healthy volunteer controls, were included in the study.

The Prevalence and Comorbidity Rates of ADHD Among School-Age Children in Turkey.

The aim of the present study was to explore the prevalence and comorbidity rates of ADHD in a community sample of school-age children. Participants were 1,508 children aged 6 to 14 years. Parents and teachers of each child completed the Turgay (4th ed.