DEMOGRAPHY1 Demography Studies reproduction of human populations.
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Transcript of DEMOGRAPHY1 Demography 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