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How do you adjust for age?
Adjustment is accomplished by first multiplying the age-specific rates of disease by age-specific weights. The weights used in the age-adjustment of cancer data are the proportion of the 1970 US population within each age group. The weighted rates are then summed across the age groups to give the age-adjusted rate.
How do you calculate age specific rate?
An age-specific rate is calculated by dividing the total number of health events for the specific age-group of interest in the total population in that age group.
How do you calculate age specific incidence rate?
Crude and age-specific incidence rates equal the total number of new cancer cases diagnosed in a specific year in the population category of interest, divided by the at-risk population for that category and multiplied by 100,000 (cancers by primary site) or by 1 million (International Classification of Childhood Cancer ...
What is age specific rate?
An age-specific mortality rate is a mortality rate limited to a particular age group. The numerator is the number of deaths in that age group; the denominator is the number of persons in that age group in the population.
What is a specific rate?
birth rate the number of live births in a geographic area in a defined period, usually one year, relative to some specified population. ... The age-specific death rate is the ratio of the number of deaths occurring in a specified age group to the average population of that group.
How do you calculate adjusted mortality rate?
An alternate way to compute the age-adjusted death rate by the direct method is simply to multiply the age- specific death rates by the corresponding proportion of the standard population in that age group and then sum these products across all 10 age groups.
Why is age Standardization important?
Age standardisation. ... The standardisation by age occurs most often because the information is usually available and the age is important for the most health problems. Use: Age standardisations based on a standard population are often used at cancer registries to compare morbidity or mortality rates.
Why is age adjustment important?
Age adjustment can make the different groups more comparable. A “standard” population distribution is used to adjust death and hospitalization rates. The age-adjusted rates are rates that would have existed if the population under study had the same age distribution as the “standard” population.
What does age Standardized mean?
Definition. The age-standardized mortality rate is a weighted average of the age-specific mortality rates per 100,000 persons, where the weights are the proportions of persons in the corresponding age groups of the WHO standard population. Associated terms.
What is the importance of standardisation of mortality rates?
Public health practitioners are often faced with the necessity to compare the mortality experience of different geographical areas. Indirect standardisation, producing a 'standardised mortality ratio' (SMR) is the most commonly used technique for doing this.
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