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Unformatted text preview: group in standard population =the number pregnancies by age group that would occur in each city if age was distributed like the standard population • For each city, add the number of pregnancies and divide by total population number in standard population • Choose a standard population with known pregnancy rate by age group (City A) • Multiply rates from City A (standard population) * number of people in each of City C’s age categories = the expected number of women that would be pregnant by age group in City C if the rates were the same as City A by age category • Calculate SMR = Total number of observed pregnancies in City C/Total number of expected in City C • Multiply SMR * crude rate in standard population (City A) Result: adjusted rate for both City A and City B to compare (specific to standard population) Result: adjusted rate for City C that you can compare to crude rate of City A...
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- Spring '08
- World population, In vitro fertilisation, standard population, City C