This is a quality assurance project to evaluate a therapy program offered to patients in Sleep Disorders Clinic. Group Cognitive Behavioral Therapy for Insomnia (CBT-I) is being offered to older adults. The study will consist of analyzing outcomes of a clinical program. As part of standard clinical process, patients complete measurements of sleep, daytime functioning, fatigue, quality of life, depression and anxiety symptoms before and after the treatment. The proposed study will pool and quantitatively analyze the existing clinical data. Only those program participants who consent to have their data pooled in the data analysis will be considered research subjects. Those patients who decline to have their individual data included in the analysis will continue in the therapeutic group as per usual clinical care standards.