استعرض مصدر Insomnia: Prevalence, risk factors, and its effect on quality of life among elderly in Zagazig City, Egypt

==Results==
The prevalence of insomnia among the studied elderly was 33.6%, while difficulty initiating sleep was the most prevalent insomnia symptoms among them. Unmarried status, depressive status, smoking, eating before bedtime, daytime long naps, irregular sleep hours were significantly associated with insomnia. Suffering from asthma, nocturia, apnea, and total number of daily medications were significantly associated with insomnia. Insomniac elderly had significantly lower scores in all quality of life domains, except the social functioning domain.