title: [Comparison of a cohort mortality with the mortality of a reference population. Principle, necessary number of expected deaths and the given power of the test].
abstract: This note derives the power of the test comparing the mortality of a cohort to the mortality of a reference population. The principle of the comparison is recalled i.e. computation of the standardised mortality radio (SMR) and test of the null hypothesis: SMR = 1. It is shown how one can compute the power of the test. A numerical example is given.
mesh_terms: D000328:Adult; D000368:Aged; D004812:Epidemiologic Methods; D006801:Humans; D008875:Middle Aged; D009026:Mortality; D013223:Statistics as Topic
vernacular_title: Comparaison de la mortalité d'une cohorte à la mortalité d'une population de référence. Principe, nombre de décès attendus nécessaire et puissance du test.