P4. Health Indicators, Demography, & Population Estimation Flashcards
- tools to measure a specific health concept of interest.
- numeric measures which help measure the targeted or expected results of health programs.
Health Indicators
4 Types of Health Indicators
- aspect of health being measured
- group referred to
- time covered by the events
- components of the evaluation framework
According to the aspect of health being measured:
1. measure health outcomes and/or their risk factors
2. measure aspects of the performance of health services or public health programs
- health status indicators
- health service performance indicators
According to the group referred to:
1. describes the total population which is used as the denominator in the computation
2. describes only a specific sub-group of the total population being considered
- Crude Rates
- Specific Rates
CRUDE DEATH RATE (CDR)
AGE-SPECIFIC DEATH RATE (ASDR)
According to the time covered by the events:
1. occurred during the specific point in time being considered
2. occurred over a period of time
- point in time
- period of time
PREVALENCE
INCIDENCE
According to the (four) components of the evaluation framework:
- input indicators
- output indicators
- outcome indicators
- impact indicators
resources needed to deliver the essential services to the population or to achieve project objectives
- Number of posters and brochures on family planning
- Number of community volunteers trained to conduct health education
Input indicators
direct products of project activities. Generally in the form of activities and processes undertaken
- Number of couples who have seen or received the posters
- Number of health education classes conducted
Output indicators
immediate result of the services or activities implemented
- % increase in the level of knowledge among couples on family planning
- % increase in number of family planning acceptors
Outcome indicators
intended or unintended long-term organizational/community changes
- decrease in the average number of children per family
- decrease in the population growth rate
Impact indicators
Three Conventional Health Status Indicators:
- Measures of Morbidity
- Measures of Mortality
- Measures of Fertility
Four Computing Indicators:
- Absolute numbers
- Ratios
- Proportions
- Rates
- Simple count of the number of persons, houses or events being considered
- Easy to understand but difficult to interpret especially when making comparisons among groups with different sizes
ABSOLUTE NUMBERS
- Result of dividing one number by another
- Reserved for measures wherein the numerator is not part of the denominator
RATIO
- Special kind of ratio wherein the numerator is part of the denominator
- When multiplied by 100 – called as percentage
PROPORTION
- measures how fast an event occurs over time or space
- expressed in terms of the frequency of occurrence of events
common example in health is the ____?
RATE
incidence rate of a disease
scientific study of human populations
Demography
“Study of the size, territorial distribution, and composition of the population, changes therein, and the components of such changes”
Hauser and Duncan (1959:2)
Demography
3 Components (?) of Demography:
- Population Size
- Population Structure/ Composition
- Population distribution in Space
Population size is affected by?
- Natality
- Mortality
- Migration
2 METHODS OF POPULATION ALLOCATION:
- De Facto Method
- De Jure Method
people are counted or allocated to the area where they were physically present at the time of the census B.
De Facto Method
people are counted or allocated to the place of their usual residence
De Jure Method
Determines the number of percentages of the population according to the categories of important socio-demographic-economic variables.
most basic description is according to
Population Composition
age and sex
4 FACTORS AFFECTING POPULATION COMPOSITION:
- birth rate
- death rate
- emigration
- immigration
Birth rate
of births per 1000 population
Death rate
of deaths per 1000 population
number of people leaving a country
Emigration
number of people moving to a country
Immigration
DESCRIBING THE AGE COMPOSITION OF A POPULATION:
- Median Age
- Age Dependency Ratio
the age below which we have 50% of the population
Median Age
- indicator of age-induced economic drain on human resources
- Children (0-14yo)
- Elderly (≥65yo)
- Computed as the ratio of the dependents to the economically active group (15-64) of the population
Age Dependency Ratio
DESCRIBING THE SEX COMPOSITION OF A POPULATION:
Sex Ratio
- computed by dividing the number of males by the number of females using a factor of 100.
- Interpreted as the number of males for every
100 females in the population.
Sex Ratio
- Graphical presentation of the age and sex structure of a population
- Either the actual population count or the percentage of the population can be graphed
- Special type of histogram
- Male = left
- Female = right (BAHAHAHA)
- Youngest = base
- Oldest = top
THE POPULATION PYRAMID
Description of how people are distributed in a specified space or geographic area
Population Distribution
Population Distribution is affected by?
- physical
- political
- social/cultural
- economic
Indicators of Population Distribution:
Population Density
Crowding Index
- Computation of future changes in population numbers
- given certain assumptions about future trends in the rates of fertility, mortality and migration
Population Estimation
Purposes of Population Estimates:
- analysis of various trends
- measuring shifts in population
- determining allocation of public funds/ political representation in the government
- For planning
5 Measures of Change in Population Size:
- Natural increase
- Rate of natural increase
- Relative increase
- Absolute increase per year (b)
- Annual rate of growth (r)
Natural increase in a specific place and time.
number of births – number of deaths
- Rate of natural increase in a specific place and time
- expressed as rate
crude birth rate (CBR) – crude death rate (CDR)
P0
population size at an initial time
time 0
population size at time t
Pt
- Actual difference between 2 census counts
- expressed in percent relative to the population size of the prior census
RELATIVE INCREASE
Measures the average number of people added to the population per year
. ABSOLUTE INCREASE PER YEAR (b)
ABSOLUTE INCREASE PER YEAR (b)
t
number of years between time 0 and time t
- Also utilize results of 2 censuses to quantify the amount of change in population size.
-
Assumes that the population is changing at a
constant rate per year.
ANNUAL RATES OF GROWTH (r)
Take into account all the operations that can affect population size
Methods of Estimation
2 METHODS OF ESTIMATION
- COMPONENT METHOD
- MATHEMATICAL METHOD
Also known as inflow-outflow or balancing equation method
COMPONENT METHOD
COMPONENT METHOD
B
births in the interval 0 and t
COMPONENT METHOD
D
deaths in the interval 0 and t
COMPONENT METHOD
I
immigration between 0 and t
COMPONENT METHOD
O
out-migration between 0 and t
3 TYPES OF MATHEMATICAL METHOD:
- arithmetic method
- geometric method
- exponential method
assumes equal change every year
arithmetic method
assumes that the population changes at the same rate over each unit
geometric method
assumes a constant rate of change (r) and population is increasing continuously
exponential method
constant equivalent of e is?
2.71