TRENDS IN INDIVIDUAL FAT CONSUMPTION IN THE UK 1900-1985

Mortality from coronary heart disease is decreasing in a number of Wes tern countries, although the pattern of the decrease differs from coun try to country. In the UK the mortality rate from coronary heart disea se has declined since 1979, whereas in the USA mortality from this dis ease began to fall in 1968 and has continued since that time. Of many factors suggested as reasons for the decline, diet has been implicated , particularly dietary fat intake. However, food balance information s uggests little change in fat intake. A recent examination of all publi shed studies from the USA where individual fat intake has been reporte d indicated that fat intake in that country has fallen steadily since the mid 1960s. The present study describes a similar compilation of al l published studies from the UK giving individual fat intakes. Ninety- seven studies, representing information for 24 045 individuals, were u sed. Studies ranged in size from two to 3581 individuals and were draw n from all regions of the UK. Most studies used 7 d weighed intakes as the method of dietary assessment. Quadratic regression equations were applied to the fat intakes from all studies over time, with each stud y weighted by the number of individuals surveyed. Data were also divid ed into 10-year periods and weighted fat intakes for each decade were calculated. Data were expressed for all studies, then subdivided into males, females, children and the elderly. Comparisons between Scotland and the South-East of England were made. Results indicate that fat re presented 30% or less of dietary energy in the UK until the 1930s, whe n it began to rise. This rise was curtailed by rationing during and af ter the Second World War, after which the rise continued, reaching a p lateau of about 40% energy in the late 1950s, with little change until the late 1970s. Trends were similar in all age-groups, but less chang e has occurred recently in Scotland compared with South-East England. These results differ from the pattern in the USA and suggest that if g reater changes in mortality from coronary heart disease are to be seen in the UK a greater reduction in dietary fat intake will have to occu r.