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Associations of cardiovascular mortality with weather in Memphis, Tennessee.

PREVIOUS investigations in temperate climates have usually shown higher cardiovascular (CV) mortality in winter months than in summer months. This is true of recent studies by Rose (1) and Boyd (2) in England, Rosenwaike (3) in the United States, Baubinene (4) in Russia, and Doring and Loddenkemper (5) in West Germany. On the other hand, Heyer and associates (6) reported increased frequency of acute myocardial infarctions in summer in Dallas, Tex., and Avierinos (7) reported similarly for Cairo and for all of Egypt. In our paper, we report mainly on variations in cardiovascular and other mortality with daily average temperature in Memphis, Tenn., for the 3-year period 1959-61. The aims of the study were to measure any excess in CV mortality related to daily temperatures and other weather indices and to determine, by using data on multiple causes of death, whether any excess in the CV mortality could be linked to respiratory diselase.