Epidemiology is the study and analysis of the distribution, patterns and determinants of health and disease conditions in defined populations.
Mortality rate, or death rate, is a measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time. Mortality rate is typically expressed in units of deaths per 1,000 individuals per year; thus, a mortality rate of 9.5 in a population of 1,000 would mean 9.5 deaths per year in that entire population, or 0.95% out of the total. It is distinct from "morbidity", which is either the prevalence or incidence of a disease, and also from the incidence rate.
Vital statistics is accumulated data gathered on live births, deaths, migration, fetal deaths, marriages and divorces. The most common way of collecting information on these events is through civil registration, an administrative system used by governments to record vital events which occur in their populations. Efforts to improve the quality of vital statistics will therefore be closely related to the development of civil registration systems in countries. Civil registration followed the practice of churches keeping such records since the 19th century.
In demography and medical geography, epidemiological transition is a theory which "describes changing population patterns in terms of fertility, life expectancy, mortality, and leading causes of death." For example, a phase of development marked by a sudden increase in population growth rates brought by improved food security and innovations in public health and medicine, can be followed by a re-leveling of population growth due to subsequent declines in fertility rates. Such a transition can account for the replacement of infectious diseases by chronic diseases over time due to increased life span as a result of improved health care and disease prevention. This theory was originally posited by Abdel Omran in 1971.
The Global Burden of Disease Study (GBD) is a comprehensive regional and global research program of disease burden that assesses mortality and disability from major diseases, injuries, and risk factors. GBD is a collaboration of over 3600 researchers from 145 countries. Under principal investigator Christopher J.L. Murray, GBD is based out of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington and funded by the Bill and Melinda Gates Foundation.
A non-communicable disease (NCD) is a disease that is not transmissible directly from one person to another. NCDs include Parkinson's disease, autoimmune diseases, strokes, most heart diseases, most cancers, diabetes, chronic kidney disease, osteoarthritis, osteoporosis, Alzheimer's disease, cataracts, and others. NCDs may be chronic or acute. Most are non-infectious, although there are some non-communicable infectious diseases, such as parasitic diseases in which the parasite's life cycle does not include direct host-to-host transmission.
Disease burden is the impact of a health problem as measured by financial cost, mortality, morbidity, or other indicators. It is often quantified in terms of quality-adjusted life years (QALYs) or disability-adjusted life years (DALYs). Both of these metrics quantify the number of years lost due to disability (YLDs), sometimes also known as years lost due to disease or years lived with disability/disease. One DALY can be thought of as one year of healthy life lost, and the overall disease burden can be thought of as a measure of the gap between current health status and the ideal health status. According to an article published in The Lancet in June 2015, low back pain and major depressive disorder were among the top ten causes of YLDs and were the cause of more health loss than diabetes, chronic obstructive pulmonary disease, and asthma combined. The study based on data from 188 countries, considered to be the largest and most detailed analysis to quantify levels, patterns, and trends in ill health and disability, concluded that "the proportion of disability-adjusted life years due to YLDs increased globally from 21.1% in 1990 to 31.2% in 2013." The environmental burden of disease is defined as the number of DALYs that can be attributed to environmental factors. Similarly, The work-related burden of disease is defined as the number of deaths and DALYs that can be attributed to occupational risk factors to human health. These measures allow for comparison of disease burdens, and have also been used to forecast the possible impacts of health interventions. By 2014 DALYs per head were "40% higher in low-income and middle-income regions."
Malaysia is classified by The World Bank as upper middle income country and is attempting to achieve high-income status by 2020 and to move further up the value-added production chain by attracting investments in high technology, knowledge-based industries and services. Malaysia's HDI value for 2015 was recorded at 0.789 and HDI rank no 59 out of 188 countries and territories on the United Nations Development Programme's Human Development Index. In 2016, the population of Malaysia is 31 million; Total expenditure on health per capita is 1040; Total expenditure on health as % of GDP (2014) was 4.2 Gross national income (GNI) per capita was recorded at 24,620
Health in Ethiopia has improved markedly since the early 2000s, with government leadership playing a key role in mobilizing resources and ensuring that they are used effectively. A central feature of the sector is the priority given to the Health Extension Programme, which delivers cost-effective basic services that enhance equity and provide care to millions of women, men and children. The development and delivery of the Health Extension Program, and its lasting success, is an example of how a low-income country can still improve access to health services with creativity and dedication.
Sudan is still one of the largest countries in Africa even after the split of the Northern and Southern parts. It is one of the most densely populated countries in the region and is home to over 37.9 million people.
The Tajikistan health system is influenced by the former Soviet legacy. It is ranked as the poorest country within the WHO European region, including the lowest total health expenditure per capita. Tajikistan is ranked 129th as Human Development Index of 188 countries, with an Index of 0.627 in 2016. In 2016, the SDG Index value was 56. In Tajikistan health indicators such as infant and maternal mortality rates are among the highest of the former Soviet republics. In the post-Soviet era, life expectancy has decreased because of poor nutrition, polluted water supplies, and increased incidence of cholera, malaria, tuberculosis, and typhoid. Because the health care system has deteriorated badly and receives insufficient funding and because sanitation and water supply systems are in declining condition, Tajikistan has a high risk of epidemic disease.
As of 31 December 2016, Turkish population is 79,814,871 of which 23.7% are between 0-14, 68% are between 15-64 and 8.3% are older than 65 years old. Life expectancy at birth for men is 75.3 and for women is 80.7 years. Maternal mortality ratio has decreased from 23 to 16 per 100,000 live births between the years 2010 to 2015. According to the data from 2015, Under-five mortality and infant mortality rates per 1000 live births are 13.5 and 11.6.
Surveillance for communicable diseases is the main public health surveillance activity in China. Currently, the disease surveillance system in China has three major components:
Health levels remain relatively low in Bangladesh, although they have improved recently as poverty levels have decreased.
According to the World Bank income level classification, Portugal is considered to be a high income country. Its population was of 10,283,822 people, by 1 July 2019. WHO estimates that 21.7% of the population is 65 or more years of age (2018), a proportion that is higher than the estimates for the WHO European Region.
Malawi ranks 170th out of 174 in the World Health Organization lifespan tables; 88% of the population live on less than £2.40 per day; and 50% are below the poverty line.
In reproductive health, obstetric transition is a concept around the secular trend of countries gradually shifting from a pattern of high maternal mortality to low maternal mortality, from direct obstetric causes of maternal mortality to indirect causes, aging of maternal population, and moving from the natural history of pregnancy and childbirth to institutionalization of maternity care, medicalization and over medicalization. This concept was originally proposed in the Latin American Association of Reproductive Health Researchers in analogy of the epidemiological, demographic and nutritional transitions.
Preventable years of life lost (PrYLL) is an epidemiological measure. It is an estimate of the average years a person would have lived if s/he had not died prematurely due to a preventable cause of death.
Montenegro is a country with an area of 13,812 square kilometres and a population of 620,029, according to the 2011 census. The country is bordered by Croatia, the Adriatic Sea, Bosnia, Herzegovina, Serbia, Kosovo and Albania. The most common health issues faced are non-communicable diseases accounting for 95% of all deaths. This is followed by 4% of mortality due to injury, and 1% due to communicable, maternal, perinatal and nutritional conditions. Other health areas of interest are alcohol consumption, which is the most prevalent disease of addiction within Montenegro and smoking. Montenegro has one of the highest tobacco usage rates across Europe. Life expectancy for men is 74 years, and life expectancy for women is 79.
Sustainable Development Goal 3, regarding "Good Health and Well-being", is one of the 17 Sustainable Development Goals established by the United Nations in 2015. The official wording is: "To ensure healthy lives and promote well-being for all at all ages." The targets of SDG 3 cover and focus on various aspects of healthy life and healthy lifestyle. Progress towards the targets is measured using twenty-one indicators.
