Coronary Thrombosis—An Environmental Study

This study was made at the request of the Cheshire County Council's Health Committee on considering the County Medical Officer's Annual Report for 1956, in which it was stated (a) that coronary thrombosis was the certified cause of death of 447 males and 111 females, resident in Cheshire, who had died in that year between the ages of 45 and 64 years, and (b) that the percentage of deaths of persons between the ages of 45 and 64 years certified to have been due to coronary thrombosis was 22.4 in that year, and that this percentage had increased in successive years since 1950. Morris et al. (1953) found a negative association between the incidence of coronary heart disease and physical activity at work. Keys (1957) reported that diet, through its fat content, Scope of Inquiry Questions were asked under the following headings: (a) place and manner of death, whether post-mortem examination was made or not; (b) marital state, occupta- tion, spouse, and children, parents, parents-in-law, and lodgers living in the household; (c) illnesses, medicines BRrSIs