Vital statistics Vital statistics A branch of statistic
Vital statistics
Vital statistics A branch of statistic which is of � particular interset to medical and social scientists is that concerned with study of human pupulations , often described as demography.
1) Measures of mortality 1) Crude death rate: It is the number of deathes in a particular time period ( usually a year ) per thousand populations. Annual number of deaths in certain C. D. R= year & locality ________ 100× mid-year population in the same year & locality
2) Age-specific death rates= Number of deathes in a speific age group in certain year and locality ____________ × 100 Mid-year population in the same year & locality
� 3) Infant mortality rate = Number of deaths of infants under one year in certain calender period and locality ____________× 100 Live births during the same period & locality �Infant mortality rate can be subdivided into further rates:
a) The neonatal mortality rate = Number of deathes of infants under 28 dayes during a calender period & locality __________ × 100 live births during the same period & locality b) The post-neonatal mortality rate= number of deaths of infants 28 days and over and under 1 year during a calender period & locality ______________× 100 live births during the same period & localitye
4) Maternal mortality rate= deaths due to causes related to pregnancy, labour and purperium during a calender period & locality __________ × 100 Total live &still births during the same period & locality
5) Case fatality rate = number of deaths from a particular disease or condition __________ × 100 Total number suffering from the diseases or condition 6) Proportional Mortality rate= number of deaths from certain diseases or conition during 1 year __________ × 100 Total deaths during year
7) Cause specific Death rate= number of deaths from certain diseases or conition during 1 year __________ × 100 Estemated mid year population
11) Measures of fertility 1) Crude birth rate= Number of live births occuring during a calender period & locality __________ × 100 Mid-year population during the same priod & locality 2) General Fertility Rate= Number of live births occuring during a calender period & locality __________ × 100 Number of women during child-bearing age (15 -45) in the population during the same period & locality
3) Age-specific fertility rate= Number of births born females in a specific group __________ × 100 Number of females in the same age group
111) Measures of morbidity Measures of disease frequency: Population at risk: Peaple who are potentially susceptible to the disease studied. The prevalence of a disease: Is the number of cases in a given population at a specific point in time. The incidence rate: Is the number of new cases beginning or arising in a given period in a specific population.
�A) Prevelance Rate= Total number of cases ( old& new) of a disease present in a population at a specific time __________ × 100 Number of persons of a population at risk at that specified time
�Prevelance Rate subdivided into: Period prevalence= Total cases during a period __________ × 100 Estemated period population Point prevalence= Total cases (old & new) on 1 week for e. g __________ × 100 Estemated population on the same week
�B) Incidence Rate= Number of new cases of disease occuring in a population during spacified time __________ × 100 Number of persons in the population at that spacified time Attack Rate= New cases during an epidemic __________ × 100 Number of persons acctually exposed practical problem
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