DEMOGRAPHY1 Demography Studies reproduction of human populations.

DEMOGRAPHY 1

DemographyDemography

Studies reproduction of human populations

DEMOGRAPHY 2

Goals Goals

•composition, size, migration of population

•analysis of previous development

•formulation of laws - how will population develop in future

Demographic dataDemographic data

•basic data about population ( basis for studies on health status of population)

Demographic events Demographic events

•First -birth, death

•Secondary - marriage, divorce, migration, abortion

DEMOGRAPHY 3

As of 1 November 2010, the world population is estimated by the United States Census Bureau to be 6.879 billion.[2]

According to papers published by the , the world population hit 6.5 billion (6,500,000,000) on 24 February 2006. The United Nations Population Fund designated 12 October 1999 as the approximate day on which world population reached 6 billion. This was about 12 years after world population reached 5 billion in 1987, and 6 years after world population reached 5.5 billion in 1993. However, the population of some countries, such as Nigeria and China is not even known to the nearest million,[3] so there is a considerable margin of error in such estimates.[4]

DEMOGRAPHY 4

Health related data

Health service data

Sources of demographic data :Sources of demographic data :

•Census (population census)

•Vital statistic

•Migration

•Population register

•Specific surveys

•Population estimates

•Population projections

•Mid year population

DEMOGRAPHY 5

Sources of health dataSources of health data

Surveys

•administrative data - rates of hospital admissions, treatment, diagnoses

•registries - disease registrations for certain chronic disease (reports sent by private practitioners, clinics, pathology, departments)

•reports - reports of unusual occurrences, increase in disease rates to responsibility agencies

- reportable diseases / law requires

- medical journals

DEMOGRAPHY 6

Vital statistics - birth, marriage, deathVital statistics - birth, marriage, death

• In 17th Century England, John Graunt (1620 - 1674) systematized record -keeping , since than, vital statistic the most reliable and consistently recorded data source

• birth certificate

• death certificate - signed by licensed physician and includes cause of death, name, birth date, sex, place of residence and death

DEMOGRAPHY 7

DEMOGRAPHIC STATICSDEMOGRAPHIC STATICSPopulation and its structurePopulation and its structure

• Density 1 km2 concentration

• structure of population:

1) biological - sex, age

2) social legal

3) social - economic

ad1) structure in accordance with sex :

• index of masculinity = number of men/per 1000 women

• index of femininity = number of women /per 1000 men

DEMOGRAPHY 8

ad2) structure in accordance with age :

Age (biological view)

• pre-reproductive age 0 - 14 years

• reproductive age 15 - 49 years

• post-reproductive 50

3 types of population :

•progressive

•stationer

•regressive

Pyramid - tree of life

DEMOGRAPHY 9

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DEMOGRAPHY 13