Transcript 40061
Epidemiologic Transition: Changes of fertility and mortality with modernization (3) Abdel Omran. The Epidemiologic Transition: A Theory of the epidemiology of population change. Milbank Quarterly. 1971;49:509-538 Abdel Omran Evolution of Disease Charles Darwin Evolution of Species Epidemiology Psychiatric Epidemiologists Diabetes Epidemiology Cardiovascular Epidemiology Cancer Epidemiology Infectious Disease Epidemiology Instead at looking at individual diseases, we need to look at the patterns of diseases Mortality is the fundamental factor in the dynamics of population growth and causes of death. Mortality has no fixed upper limits. Thus if fertility approached its upper maximum, depopulation would still occur. During the epidemiologic transition, a long-term shift occurs in mortality and disease patterns whereby pandemics of infection are replaced by degenerative and man-made diseases... Age of Pestilence and Famine Characterized by high mortality rates, wide swings in the mortality rate, little population growth and very low life expectancy Age of Receding Pandemics Epidemics become less frequent, infectious diseases in general become less frequent, a slow rise in degenerative diseases begin to appear The shifts in disease patterns in the 19th century were primarily related to changing SES. With the 20th Century more related with disease control activities independent of SES: e.g. Mexico, China Epidemiologic Transition in Developing and Developed Countries 80 70 60 50 Developing Developed 40 30 20 10 0 1945 1960 1980 1995 14 years 35 years Increasing Life Expectancy and Causes of Death 100 Other 80 60 Violence 40 20 CHD CA Infection 0 40 44 48 52 56 60 64 68 Population Life Expectancy 72 76 Mortality Rates Infectious Diseases NCD Epidemiologic Transition Death Rates for TB in England and Wales 4500 TB Bacillus Identified 4000 3500 3000 2500 2000 Chemotherapy 1500 BCG Vaccination 1000 500 0 1840 1855 1875 1895 1915 1935 1948 1958 1968 Death Rates for Measles in Children in England and Wales 1400 1200 1000 800 600 Immunization begun 400 200 0 1850 1870 1890 1910 1930 1950 1970 Mortality Rates NIDDM CHD Trauma CA Epidemiologic Transition High Incidence of NCDs in Developing Countries Possible Infectious Etiology Macronodular Cirrhosis Hepatocellular Carcinoma Rheumatic Heart Disease Iron deficiency anemia Related to Nutrition Deficiency Endemic Goiter Malnutrition Related Diabetes. High Incidence of NCDs in Developed Countries Cardiovascular CHD Deep Vein Thrombosis Respiratory Emphysema Lung CA Female Genital Endometriosis Endometrial CA Breast Breast CA Fibrocystic Disease Male Genital Prostrate CA Metabolic NIDDM Back to Nature Improved Physical activity A Healthier Diet, less saturated fats, more fiber Less Stress Transition Nomads Farmers Urban 45 yrs 60 yrs 70 yrs 1960 Urban rural USA Rural urban Developing Countries 2010 Urban Rural urban rural USA Developing Countries Causes of Death Developed Developing Age 15-44 Age 15-44 Accidents CA CHD Accidents CHD CA Age 45-54 CHD CA Accidents Age 45-54 CHD CA Accidents Conclusion The epidemiologic transition ties together fertility with rise in SES. The Second component is that it present the idea that disease appears in populations like a symphony with disease rising and falling, all in relationship to each other Review Questions (Developed by the Supercourse team) • What might the epidemiologic transition tell us about the evolution of chronic diseases? •Over the past 100 years, life expectancy and causes of death have become homogenous world wide. Why is this important?