The negative aspect of this study was that people in the control group were not strongly persuaded to change their behaviour, however, many still may have. This suggests two problems, first there is a problem with ethics, as researchers know that changing their lifestyle will benefit their heart condition, but do not want them to, and secondly, some patients will change their lifestyle after having a major heart problem without the persistence of doctors. Another study on secondary prevention found the same results as Murchie et al. (2003) and reports that the patients involved had a much lower incidence of further health problems when living in a clinical setting with trained nurses. This is similar to the previous study as they both found that with changes in a person's lifestyle ones heart problems can be drastically reduced. There has been other research done to discover other factors to decrease the likelihood of heart problems. One of these studies was conduced to discover if dietary lipids prevented arteriosclerosis in animals. This study, conducted by K. Imaizumi et al. (2000), found that there is a direct relationship between polyunsaturated fatty acids and the state of artery walls. Jack Saari and Dale Schuschke (1999) did a study to determine if copper deficiencies had an effect on health conditions. It has been proven in the past that low copper in the body may lead to high blood pressure, which has been proven as a risk factor of CHD. All of the above risk factors lead to the incidences of coronary heart disease, and there have been many reviews to discover if a particular culture, or geographic area is more susceptible to CHD, and in the research done it has been found that some areas are more likely to eat a high fat diet, or to not participate in exercise. However, it was also found that even in these areas most of the CHD patients had preventable symptoms, and were still due to lifestyle (Sutcliffe, 2003).
