[Cardiac mortality among working middle aged Frenchmen according to their socio-economic class and geographic region (author's transl)].

The cardiac mortality of working Frenchmen aged 44-65 is studied from the national mortality statistics in 1968. Cardiac mortality causes are joined into four categories according to their a priori precision. The distribution of mortality rates for cardiac causes is analysed according to the socio-economic classes (9 classes) and the geographic regions (19 regions). Important differences of the cardiac mortality are put into evidence according these two sampling schemes and particularly high rates are observed in the class of employees and the North East part of France. The cardiac fraction of the global mortality and the ischaemic fraction of the cardiac mortality augment according to the usual hierarchy of the socio-economic classes but are less variable among the geographic regions. Disparities in the notification of mortality causes may partly explain these results.