1. 1) Ainamo J, Barmues D, Beagrie G, Cutress T, Martin J, Infirri JS (1983) Development of the World Health Organization community periodontal index of treatment needs. Int Dent J 32:281-291.
2. 2) Andoh Y, Hanada N (1999) The relationship between oral condition and health status in the elderly. J Jpn Dent Assoc 52:20-29. (in Japanese)
3. Falls in the institutionalized elderly in Japan
4. 4) Health Policy Bureau Ministry of Health and Welfare (2001) Report on the Survey of Dental Diseases (1999), Oral Health Association of Japan, Tokyo. (in Japanese)
5. 5) Hirano H, Ishiyama N, Watanabe I, Suzuki T (1993) Oral examination of longitudinal interdisciplinary study on aging (II) Masticatory ability in relation to oral status and general health. Rounen Shigaku 7:150-155. (in Japanese)