A questionnaire survey was administrated to 223 elderly persons demonstrating independence in their daily activities to understand important aspects for designing care to improve sleep quality. The findings were generally favorable, because the subjects demonstrated an average subjective sleep time of 6.9hours, and sleep efficiency of 88.4%, and 70.9% of the subjects demonstrated a sense of deep sleep. However, high scores for sleep disorders and difficulty in maintaining sleep were marked. The "bad sleep group" showed higher risk at the four items (lower subjective health feeling, poor mental health status, experiencing disorder on the treatment and so forth) than the "good sleep group". Some interventions are further necessary to improve the integrated health of the "bad sleep group".
