Sleep disorders in patients with juvenile idiopathic arthritis as assessed by the sleep disturbance scale for children

Methods Out of 35 patients with JIA, enrolled after parental consent, 31 (23 males and 8 females) completed the study. Mean age of the patients was 9.8 years (Range 6.114.5 years). The patients were enrolled when they demonstrated active disease at presentation or during relapse, as ‘active disease group’ and followed up regularly at 6-8 weekly intervals, till they improved with treatment. Disease activity of JIA was assessed by ACR PEDI criteria. Sleep was studied using SDSC which is a validated screening tool (for the age interval studied), that categorizes sleep disturbances into six different categories: Disorders of initiating and maintaining sleep (DIMS), Sleep disordered breathing (SDB), Disorders of arousal (DA), Sleep wake transition disorders (SWTD), Disorders of excessive somnolence (DOES) & Sleep hyperhydrosis (SHY). The SDSC questionnaire was filled by the parent / patient in the waiting room at each follow up visit. When the patients showed maximum improvement in JIA, they were included in the ‘post treatment’ group. For quantifying sleep disorders, we compared the scores of the subjects with scores derived from a sample of normal population in a similar age band from our city. Differences between the active and post treatment groups were analyzed by non parametric Wilcoxson test for paired data and non parametric Mann-Whitney U test for unpaired data