“…Patients with newly diagnosed SDs were selection from 1 January to 31 December 2005 by ICD-9 code as follows 307.4 (specific disorders of sleep of nonorganic origin), 780.5 (sleep disturbance), 780.50 (sleep disturbance, unspecified), 780.52(insomnia, unspecified), 780.54 (hypersomnia, unspecified), 780.55 (disruptions of 24-h sleep-wake cycle, unspecified), 780.56 (dysfunctions associated with sleep stages or arousal from sleep), 780.58 (sleep-related movement disorder, unspecified), 780.59 (sleep disturbance, other), and 780.51, 780.53, 780.57 (OSA)13 from the LHID. The SD patients were divided into four groups based on difference ICD code: insomnia, sleep disturbance, OSA, and others.…”