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to address global health issues we must understand:
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-factors that influence health status most
-indicators used to measure health status
-key trends in health status that have occurred historically
-indicators used to measure health status
-key trends in health status that have occurred historically
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morbidity
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sickness or any departure, subjective or objective, from a psychological or physiological state of well being
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mortality
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death
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disability
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temporary or long term reduction in a person's capacity to function
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prevalence
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# of people suffering from a certain health condition over a specified period
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incidence
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the rate at which new cases of a disease occur in a population
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primary prevention
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intervening before health effects occur
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secondary prevention
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screening to identify disease before the onset of signs and symptoms
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tertiary prevention
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managing disease post diagnosis or stopping disease progression
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communicable diseases
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illnesses caused by a particular infectious agent that spreads directly or indirectly from people to people, animals to people or people to animals, aka infectious diseases
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non communicable diseases
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illnesses not spread by an infectious agent
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injuries
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include road traffic injuries, falls, self-inflicted injuries and violence
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determinants of health
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-interconnected factors that determine an individual's health status
-include personal and inborn features, socioeconomic status, culture, enviro, education level, health behaviors, childhood development, access to care and gov policy, age and sex
-include personal and inborn features, socioeconomic status, culture, enviro, education level, health behaviors, childhood development, access to care and gov policy, age and sex
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what are health status indicators used for:
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-determining the causes of morbidity, disability and death
-carrying out disease surveillance
-making comparisons about health within and across countries
important to use a consistent set of health indicators
-carrying out disease surveillance
-making comparisons about health within and across countries
important to use a consistent set of health indicators
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life expectancy highest
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North America
lowest in sub saharan africa and south asia
lowest in sub saharan africa and south asia
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highest maternal mortality
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sub saharan africa
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highest infant mortality
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Sub-Saharan Africa
lowest in north america
lowest in north america
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neonatal mortality
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highest in south asia and sub saharan africa
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under 5 mortality
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highest in sub saharan africa and south asia
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Vital Registration
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-records births, deaths and causes of death
-accurate system key to having quality data on a population
-many low and middle income countries lack system
-often cultural barriers to timely registration
-accurate system key to having quality data on a population
-many low and middle income countries lack system
-often cultural barriers to timely registration
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burden of disease
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-impact of morality, morbidity and disability
-calculated by age gender and region
-allows comparison across regions
-calculated by age gender and region
-allows comparison across regions
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Health Adjusted Life Expectancy (HALE)
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-# of years a person of a given age can expect to live in good health, taking account of morality and disability
-calculated by weighting # of years of ill health according to severity subtracted from the overall life expectancy
-calculated by weighting # of years of ill health according to severity subtracted from the overall life expectancy
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Disability Adjusted Life Year (DALY)
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-most commonly used indicator of health status
-sum of years lost d/t premature death and years lived with disability
-calculated by subtracting age one dies and ones life expectancy at that age
-sum of years lost d/t premature death and years lived with disability
-calculated by subtracting age one dies and ones life expectancy at that age
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HIC deaths and DALYS
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deaths: IHD and Alzheimer's/dementia
DALYS: IHD and low back/neck pain
DALYS: IHD and low back/neck pain
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Upper middle income deaths and DALYS
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deaths: IHD and stroke
DALYS: IHD and stroke
DALYS: IHD and stroke
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lower middle income deaths and DALYS
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deaths: IHD and stroke
DALYS: IHD and lower resp infection
DALYS: IHD and lower resp infection
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low income deaths and DALYS
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deaths: lower resp infx and IHD
DALYS: malaria and low resp infx
DALYS: malaria and low resp infx
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demography and health
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Population growth, population aging, urbanization, the demographic divide, the demographic transition
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population growth
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-population increased, ppl living longer with illnesses
-increased pop in lower/middle income countries- higher fertility rates
-high income countries below replacement fertility
-increased pop in lower/middle income countries- higher fertility rates
-high income countries below replacement fertility
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population aging
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-seen in HIC
-elderly support ratio- # of people aged 15-64 years compared to those 65+
-aging pop has profound implications:
-increased burden of disease, health expenditures and how health care financed
-elderly support ratio- # of people aged 15-64 years compared to those 65+
-aging pop has profound implications:
-increased burden of disease, health expenditures and how health care financed
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urbanization
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-majority of global population lives in urban areas
-puts pressure on urban infrastructure, water and sanitization, schools and health services
-gaps in infrastructure can have substantial negative consequences for health
-puts pressure on urban infrastructure, water and sanitization, schools and health services
-gaps in infrastructure can have substantial negative consequences for health
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demographic divide
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- Highest-income countries have low fertility, declining populations, and aging populations
- Lowest-income countries have high-fertility, although it is slowly declining
- Lowest-income countries have high-fertility, although it is slowly declining
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demographic transition
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-shift in pattern of high fertility and high mortality to low fertility and low mortality
-decline in mortality with improved hygiene and nutrition, followed by decline in fertility
-decline in mortality with improved hygiene and nutrition, followed by decline in fertility
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epidemiologic transition
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-first: high and fluctuating mortality, r/t poor health conditions, epidemics and famine
-second: progressive decline in mortality as epidemics become less frequent
-last: further declines in mortality, increases in life expectancy and the predominance of noncomm disease
movement from pattern of communicable to non communicable disease
-second: progressive decline in mortality as epidemics become less frequent
-last: further declines in mortality, increases in life expectancy and the predominance of noncomm disease
movement from pattern of communicable to non communicable disease
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factors that improved health include:
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nutrition, education, political stability and scientific improvements
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what is burden of disease influenced by?
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-economic development
-scientific and technological change
-climate change
-political stability
-emerging and re-emerging infectious diseases
-scientific and technological change
-climate change
-political stability
-emerging and re-emerging infectious diseases
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intergenerational links
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parents health and education affects their children
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health productivity and earnings
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-good health increases longevity and lifetime earnings
-healthy workers are more productive than unhealthy workers
-if ill can't work and can't make money
-healthy workers are more productive than unhealthy workers
-if ill can't work and can't make money
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equity
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differences in health that are not only unnecessary and avoidable but also unfair and unjust
about fairness
about fairness
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inequality
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-differences in health status or in the distribution of health determinants b/w different population groups
-equality is about outcomes
-equality is about outcomes
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health disparities
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-a type of difference in health that is closely linked with social or economic disadvantage
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common patterns
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-less well of people with less social and political power will generally have worse health poorere services and less fairness and protection for financing health
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public expenditure
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expenditure by any level of government or government agency
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private expenditure
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expenditure by sources other than the government such as non-governmental organization or individuals
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out of pocket expenditure
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expenditure by individuals that is not covered or reimbursed by an insurance program
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cost effectiveness analysis
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-compares the cost of an intervention with the amount of health that can be purchased with that investment
-can help to set priorities among different ways of achieving a health goal
-can be used to compare costs and gains of different health interventions
-should not be the only factor in decisions
-can help to set priorities among different ways of achieving a health goal
-can be used to compare costs and gains of different health interventions
-should not be the only factor in decisions