Uncorrected and corrected SNC mortality rates for selected causes of death in comparison to the Swiss reference rates for the population aged 85 and older*. Light gray triangles: uncorrected rate SNC, dark gray squares: rate SNC after allocation, black dots: reference rate. *Uncorrected SNC rates were calculated with SNC death certificates linked to census 1990 and 2000 (numerator) and exact person-time at risk (denominator). The corrected SNC rate also used the initially unlinked deaths in the numerator. Swiss reference rates were calculated with all death certificates (numerator) and the midyear reference population of Swiss Federal Statistical Office (denominator).