Methodology - Number of women and men, demografic events

Population size (population stock, number of inhabitants/residents) is calculated by the Czech Statistical Office (CZSO) on the basis of the results of a census of population, houses and dwellings and an annual balance of demographic events. All data refer to citizens of the Czech Republic, regardless of citizenship, and foreigners with long-term residence in the Czech Republic. Since 2022, the population also includes persons granted temporary protection in the Czech Republic who have applied for its extension.

Pursuant to the Act No. 326/1999 Coll., on the Residence of Foreigners in the Territory of the Czech Republic and amending certain acts, such a person is deemed a foreigner, who lacks Czech citizenship, including a national of the EU. The acquisition and loss of citizenship of the Czech Republic is governed by the Act No. 186/2013 Coll., on Citizenship of the Czech Republic. The act became effective on 1 January 2014. Besides other changes brought by the act, it allows e.g. dual or multiple citizenship. The presented data for women and men do not include foreigners with valid asylum in the Czech Republic. Data source: Directorate of Foreign Police Service.

Age is given in completed years, i.e. represents the age at the last birthday. Data on the age structure of the population are commonly available for units of age (with the last open age group of 100+ years). They are published in this detail for the administrative districts of municipalities with extended powers (AD MEP) and higher territorial units. The population of municipalities is usually published broken down into basic age groups 0–14, 15–64, and 65+ years.

Index of ageing: the ratio of the number of persons aged 65 years and over to the number of children aged 0–14 years (usually expressed as the number of elderly persons per 100 children) at the reference time.

Average (mean) age: the arithmetic average of ages of all individuals in the population (of a given sex or total) living at the reference time.

The life expectancy shows the average number of years an x-year-old individual can expect to live, given the mortality conditions of the reference year (period). It is a resulting indicator from life tables, which reflects mortality conditions of the given year (period). With regards to elimination of random deviations, life tables for Regions are processed for two-year periods and for Districts for five-year periods.

For the compilation of statistics on cause of death, the Institute of Health Information and Statistics of the Czech Republic (IHIS CR) transmits selected characteristics of the relevant part of the Report of examination of the deceased person (causes of death and related medical characteristics) to the CZSO. Causes of death have been coded according to the 10th revision of the International Statistical Classification of Diseases and Related Health Problems (ICD-10) and its updates issued by the World Health Organization (WHO).