Methodology - Number of women and men, demographic events
Data on the size and structure of the population presented by CZSO are obtained from population censuses that are updated by annual statistical balances of data on demographic events.
All data refer to citizens of the Czech Republic and foreigners with permanent residence in the Czech Republic, third-country nationals with temporary residence in the Czech Republic based on a long-term visa (over 90 days) or a long-term residence permit, nationals of the EU Member States, Norway, Switzerland, Iceland, Liechtenstein and their family members with notified temporary residence in the Czech Republic, and foreigners with international protection granted in the Czech Republic, or persons with temporary protection granted and usual residence in the Czech Republic.
Further details on the methodology applied in the processing of population data are available in Population - Methodology | Statistics.
Births are classified territorially according to the place of residence of the mother at the time of childbirth, deaths according to the place of residence at the time of death, marriages according to the place of residence of the groom (unless otherwise stated), and divorces according to the last common place of residence of the married couple.
The cause of death refers to an underlying cause of death, which is defined as (a) the disease or injury which initiated the train of morbid events leading directly to death, or (b) the circumstances of the accident or violence which produced the fatal injury. 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 Organisation (WHO).
Further details on the methodology related to population change are available in Population change - Methodology | Statistics.
Overview of the main presented indicators:
Average (mean) age is the arithmetic average of the ages of all individuals in the population (of a given sex, or total) living at the reference time.
Median age is the age that divides a given population into two numerically equal groups; the number of persons younger than the median age equals the number of persons older than the median age.
The age-specific fertility rate represents the number of live births to women in a particular age/age group, per 1,000 mid-year population of women in that age/age group.
The life expectancy represents the average number of years an x-year-old individual can expect to live, given the mortality conditions of the reference period. It is the summary indicator of life tables. To exclude random fluctuations, the life tables for regions were calculated for a two-year period, and the life tables for the districts were calculated for a five-year period.
Standardised mortality rates (presented for regions by sex and selected groups of causes of death) are mortality rates standardised using the direct standardisation method. The European Standard Population, as defined by Eurostat (2012 revision), is used as the standard population. The purpose of standardisation is to eliminate the effect of differences in the age structure of regional populations on observed mortality levels.
The total first marriage rate is the proportion of men/women (in %) who would enter into their first marriage before reaching the age of 50, provided that age-specific marriage, mortality, and migration rates of single persons observed in a reference year remained unchanged. It is the summary indicator of one-decrement nuptiality life tables.