In Switzerland as in most other countries, information about the variation of survival and mortality risk due to socio-demographic factors is generally scarce and prone
to numerator/denominator problems. This especially applies to educational level and occupation/profession, the latter hitherto in Switzerland among men only fragmentarily and among women not at all examined. The Swiss National Cohort (SNC) as
a nationwide data base covering the entire population of Switzerland enables
more valid and reliable analyses, even for small subpopulations like Catholic order members. In addition, the SNC offers also new perspectives for historical cohorts
like SILAG, for which a mortality follow-up can be established.