The average human lifespan can be calculated. There are even special formulas that are designed specifically for this purpose. When calculating the life expectancy of a person, it turns out to what age a person should live.
Factors
However, a number of additional factors should be taken into account, such as the state of health, education, social conditions in the country or region in which this person lives. Analyzing the collected information, experts predict the time in which he will die.
It is also possible to compare life expectancy at birth for people living in different geographical areas (both within the same country and internationally). Using this information, specialists gain access to demographic information and information about population growth around the world.
Demographic indicators are collected at the United Nations. The UN emphasizes that life expectancy is one of the main factors that serve to indicate the human development index of individual peoples.
Tables for calculation
Information on age, gender, and maternal mortality can be found in tables that include life expectancy rates for a particular human population.
When creating such tables, real data on fertility and death in the population, taking into account the region, gender and age, are taken into account. Mathematical formulas make this information accurate in calculating the probability of death.
What do you need
Before calculating life expectancy, it is necessary to collect specific statistics on demographic variables. The calculations are based on three main criteria: gender, age, region. However, the most commonly used measure is life expectancy at birth.
Regular recounts over the next three years are recommended. This follows from the method of constructing tables and calculating life expectancy at birth, which are extremely dependent on the increase or decrease in the number of deaths in a particular area. And this value is variable. In addition, it is not recommended to perform calculations for specific groups of people, such as a city or a village. Here the situation may change from year to year.
Generational calculation
In the case of a hypothetical generation, life expectancy at birth is calculated for representatives of another generation, with data for a specific year or period. If the current generation is taken, and the years of life of this group are common, you can analyze the number of years lived by each of the members of this group.
Math calculations
Mathematical actions begin by calculating the total number of years lived by a given generation, starting with a specific age (x). The analysis is carried out most often from the moment of birth, x = 0. The general formula for calculating life expectancy at birth looks like this:
ex = Tx / lx
- Tx is the total number of years a person has experienced at the age of x.
- lx is the number of people who survived and reached exactly age x.
In addition, it is necessary to calculate another indicator in which you need to indicate the total number of years lived by a specific age.
Life Expectancy Comparison
There are many applications for calculating life expectancy for each person, as well as many additions. All that is needed is just to indicate the date and country of birth, as well as the gender of the person.
Some databases allow you to compare the life expectancy of people originating from different countries, and also provide the ability to determine the estimated date of death.
Such programs can be used by people around the world. Everyone can find out if he lives in a country where people live to old age, or maybe die young. Such data are approximate and may be subject to discussion for various reasons.
Modern tendencies
Science is looking for ways that would allow a person to live forever. Even if humanity is not yet ready for immortality, the average life expectancy in some regions may soon exceed 100 years.
The average life expectancy in developed countries is normally 79 years for men and 83 for women, although the happiest of us can live up to 115 years. In April last year, a certain Emma Morano died at a respectable age, she was 117 years old. And in 1997, the Frenchwoman, who lived 122 years, left.
Humanity lives longer
Of course, this trend does not apply to all countries. The life expectancy of a person varies greatly depending on the environmental conditions of the state. The life path of a person also affects this. For example, the most common causes of death - heart attacks, strokes, cancer - develop under the influence of prolonged stress and a sedentary lifestyle. Life expectancy is highest in developed countries - European states, the United States of America.
Recent studies, however, suggest that an upper age limit does not exist at all. In other words, humanity in theory is able to live forever - at least in theory for sure. Researchers from McGill University annually, since 1968, analyze the life expectancy of the oldest citizens of the United States, Britain, France and Japan. They transmit information about their observations, according to which it is not known how many years a person can live, what is his initial potential.
If the upper limit of human age actually exists, no one has yet reached it. Given global trends, we can expect that in the future, life expectancy will continue to grow.
Three main factors affecting life expectancy are mortality among newborns, the level of development of infrastructure, sanitation and nutrition. Scientists from McGill University argue that at the moment when the development of civilization allows us to fully resolve these three factors, our life will last much longer.