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Biostatistics is a branch of statistics that applies statistical methods to a wide range of topics in biology. It encompasses the design of biological experiments, the collection and analysis of data from those experiments and the interpretation of the results.
Demographics of Libya is the demography of Libya, specifically covering population density, ethnicity, education level, health of the populace, economic status, and religious affiliations, as well as other aspects of the Libyan population. The Libyan population resides in the country of Libya, a territory located on the Mediterranean coast of North Africa, to the west of and adjacent to Egypt. Libyans live in Tripoli. It is the capital of the country and first in terms of urban population, as well as Benghazi, Libya's second largest city.
Demographic features of the population of Yemen include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population.
Demography is the statistical study of populations, especially human beings.
Infant mortality is the death of an infant before the infant's first birthday. The occurrence of infant mortality in a population can be described by the infant mortality rate (IMR), which is the number of deaths of infants under one year of age per 1,000 live births. Similarly, the child mortality rate, also known as the under-five mortality rate, compares the death rate of children up to the age of five.
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.
In survival analysis, the hazard ratio (HR) is the ratio of the hazard rates corresponding to the conditions characterised by two distinct levels of a treatment variable of interest. For example, in a clinical study of a drug, the treated population may die at twice the rate per unit time of the control population. The hazard ratio would be 2, indicating higher hazard of death from the treatment.
Sub-replacement fertility is a total fertility rate (TFR) that leads to each new generation being less populous than the older, previous one in a given area. The United Nations Population Division defines sub-replacement fertility as any rate below approximately 2.1 children born per woman of childbearing age, but the threshold can be as high as 3.4 in some developing countries because of higher mortality rates. Taken globally, the total fertility rate at replacement was 2.33 children per woman in 2003. This can be "translated" as 2 children per woman to replace the parents, plus a "third of a child" to make up for the higher probability of males born and mortality prior to the end of a person's fertile life. In 2020, the average global fertility rate was around 2.4 children born per woman.
In epidemiology and demography, age adjustment, also called age standardization, is a technique used to allow statistical populations to be compared when the age profiles of the populations are quite different.
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.
In epidemiology, the standardized mortality ratio or SMR, is a quantity, expressed as either a ratio or percentage quantifying the increase or decrease in mortality of a study cohort with respect to the general population.
Relative survival of a disease, in survival analysis, is calculated by dividing the overall survival after diagnosis by the survival as observed in a similar population not diagnosed with that disease. A similar population is composed of individuals with at least age and gender similar to those diagnosed with the disease.
Medical statistics deals with applications of statistics to medicine and the health sciences, including epidemiology, public health, forensic medicine, and clinical research. Medical statistics has been a recognized branch of statistics in the United Kingdom for more than 40 years but the term has not come into general use in North America, where the wider term 'biostatistics' is more commonly used. However, "biostatistics" more commonly connotes all applications of statistics to biology. Medical statistics is a subdiscipline of statistics. "It is the science of summarizing, collecting, presenting and interpreting data in medical practice, and using them to estimate the magnitude of associations and test hypotheses. It has a central role in medical investigations. It not only provides a way of organizing information on a wider and more formal basis than relying on the exchange of anecdotes and personal experience, but also takes into account the intrinsic variation inherent in most biological processes."
A cure is a substance or procedure that ends a medical condition, such as a medication, a surgical operation, a change in lifestyle or even a philosophical mindset that helps end a person's sufferings; or the state of being healed, or cured. The medical condition could be a disease, mental illness, genetic disorder, or simply a condition a person considers socially undesirable, such as baldness or lack of breast tissue.
Non-Hispanic Whites, Non-Latino Whites, or more simply Whites, are Americans classified by the United States census as "white" and are not of Hispanic ethnicity. According to the United States Census Bureau yearly estimates, as of July 1, 2022, Non-Hispanic whites make up about 59.3% of America's population, or 197,639,521 people. The United States Census Bureau defines white to include European Americans, Middle Eastern Americans, and North African Americans. Americans of European ancestry are divided into various ethnic groups. More than half of the white population are German, Irish, English, Italian, French and Polish Americans. Many Americans are also the product of other European groups that migrated to parts of the US in the 19th and 20th centuries, as the bulk of immigrants from various countries in Northern, Central, Eastern, and Southeastern Europe, as well as the Caucasus region, migrated to the United States.
Anaplastic astrocytoma is a rare WHO grade III type of astrocytoma, which is a type of cancer of the brain. In the United States, the annual incidence rate for anaplastic astrocytoma is 0.44 per 100,000 people.
Abhaya Indrayan is an Indian professor and researcher of Biostatistics. He had worked with different organizations and universities, including Delhi University College of Medical Sciences and the World Health Organization.
The critical community size (CCS) is the minimum size of a closed population within which a human-to-human, non-zoonotic pathogen can persist indefinitely.
In South Korea, aging refers to an increase in the proportion of senior citizens to the total population. The term "senior citizens" include those aged 65 or older. According to Article 3 no.1 of the Framework Act on Low Birthrate of an Aging Society, the term "aging population" refers to the increasing proportion of elderly people in the entire population.
References
- Medical Biostatistics, Third Edition (MedicalBiostatistics.synthasite.com), A. Indrayan (indrayan.weebly.com), Chapman & Hall/ CRC Press, 2012
- Introduction to Sociology, Bruce J. Cohen and Terri L. Orbuch
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