Related Experiment Video
Updated: Sep 26, 2026

Measurement of Lifespan in Drosophila melanogaster
Published on: January 7, 2013
[Mortality of 1880-1980 generations in Switzerland: a rereading of evolution of mortality based on longitudinal data]
1Philippe.Wanner@unine.ch
Objectives:
Seek to explain the declining mortality rates observed in Switzerland using a different approach from conventional period analyses.
Methods:
Analysis of the mortality rates for cohorts born between 1880 and 1980 in Switzerland.
Results:
While the mortality transition was a constant feature of the 20th century, mortality receded most sharply among the 1900 to 1940 birth cohorts. Life expectancy gains were much lower for the pre-1900 cohorts, while early trends for the post-1940 cohorts point to a slowdown in the rate of mortality decline. These findings may be connected with the social and health conditions in which the different cohorts lived.
Conclusion:
In contrast to the cross-sectional analysis, the longitudinal approach shows that the decline in mortality suddenly stops with the 1940 cohort.
Related Concept Videos
Applications of Life Tables
Life Tables
Longitudinal Research
Survival Curves
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
Life Histories
Actuarial Approach
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
