1. DEMOGRAPHY1 Demography Studies reproduction of human populations

2. DEMOGRAPHY2 Goals composition, size, migration of population analysis of previous development formulation of laws - how will population develop in future Demographic data basic data about population ( basis for studies on health status of population) Demographic events First -birth, death Secondary - marriage, divorce, migration, abortion

3. DEMOGRAPHY3 As of 1 November 2010, the world population is estimated by the United States Census Bureau to be 6.879 billion. [2]estimatedUnited States Census Bureau [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] United Nations Population FundNigeria [3] [4]

4. DEMOGRAPHY4 Health related data Health service data Sources of demographic data : Census (population census) Vital statistic Migration Population register Specific surveys Population estimates Population projections Mid year population

5. DEMOGRAPHY5 Sources 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

6. DEMOGRAPHY6 Vital 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

7. DEMOGRAPHY7 DEMOGRAPHIC STATICS Population and its structure Density 1 km 2 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

8. DEMOGRAPHY8 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

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13. DEMOGRAPHY13