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            The concept of health underwent significant changes
            during the twentieth century. A twentieth century hallmark was the
            WHO's founding definition, in 1948, of health as "a state of
            physical, mental and psychological well being, and not merely the
            absence of disease". But mere enlightenment is usually not
            enough to change the way we do things. The epidemiological
            transition from high to low mortality conditions made it necessary
            to look at new ways of measuring population health by combining the
            mortality and morbidity experience. These transitions produce
            characteristic changes in disease profile and age composition,
            namely: (a) reduced incidence or prevalence of infectious diseases,
            (b) increased prevalence of non - communicable and degenerative
            diseases, and (c) increase in proportion of elderly and geriatric
            population. Each of these changes has its impact on the measurement
            of health status. Rising costs of health care, provided added
            impetus towards development of summary measures of health status to
            facilitate cost-effectiveness studies. Although, the WHO adopted an
            inclusive definition of health in 1948, conventional measures of
            health status like the life expectancy, infant mortality rate, and
            disease specific measures of morbidity continued to provide the
            basic framework of indicators of health status. By end of the
            twentieth century, after 52 years of its founding, WHO adopted a set
            of summary measures of population health status. These new measures
            are being commonly referred to as burden of disease measures, since
            they combine the impact of diseases on mortality as well as
            morbidity. The World Health Report, 2000 (WHR, 2000) contained a set
            of health status measurements for different countries using the
            Burden of disease framework. Publication of the WHR 2000 has
            stimulated interest in National Burden of Disease studies. This book
            describes the experience and insights from the first National Burden
            of Disease study started after publication of the Global Burden of
            Disease (GBD) estimates in the World Bank's World Development
            Report, 1993. The Andhra Pradesh Burden of Disease study was started
            in 1993. However, it took about seven years for the study to
            partially complete, leading to publication of these results. This
            book is result of this long exercise. The book describes in detail
            various aspects of the NBD estimation process, focusing on the
            Andhra Pradesh state in India. A major concern addressed by the book
            is how to anchor NBD estimates to local data and there by provide a
            strong foundation of evidence and information for policy. Although
            the book revolves around the AP state in India, its contents has
            wider application and will be a useful guide for National Burden of
            Disease Studies
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