[Longitudinal socio-gerontologic geronto-epidemiologic study in Hajdúszoboszló (SZOLOVI, 1964-1991)].

The tendencies of the demographic changes in Hungary, the trend and pace of the expected development of the age distribution and social stratification anticipated even in the early sixties that the problem of the ageing population (of the agriculture) would raise to national level and a considerable part of its consequent tasks will be the share of the national health care. So began in 1964 in Hajdúszoboszló a social gerontological-geroepidemiological study of those who were 60 and over and had agricultural profession. This study was developed into a longitudinal one (in the years 1986, 1990, 1991 and 1993), and is being continued even today.