Naoki Kondo|Takashi Mizutani|Junko Minai|Mari Kazama|Hisashi Imai|Yasuhisa Takeda|Zentaro Yamagata
Factors Explaining Disability-free Life Expectancy in Japan: the Proportion of Older Workers, Self-reported Health Status, and the Number of Public Health Nurses
University of Yamanashi|University of Yamanashi|University of Yamanashi|University of Yamanashi|University of Yamanashi|University of Yamanashi|University of Yamanashi
background disabilityfree life expectancy dfle data 47 prefectures japan reported 1999 however studies identified factors associated length dfle objective study elucidate primary factors explain differences dfles japanmethods ecological study 47 prefectures japan used units analysis dfles men women 65 years age dfle65 calculated hashimoto et al using sullivans method set dependent variables various national surveys 181 factors associated demographics socioeconomic status health status health behaviors medical environment social relationships climate areas gathered independent variables pearsons spearmans correlation coefficients calculated screen independent variables potentially associated dfle65s multivariate linear regression analyses conducted selected 24 independent variables adjusting proportion older people 65 years population densityresults multivariate linear regression analyses revealed large number public health nurses per 100000 population good selfreported health status high proportion older workers significantly associated long dfle65s gendersconclusions three factors could potentially explain differences dfle older population japanj epidemiol 2005 15219227