smr: Standardized mortality ratios and confidence intervals
In m-allik/SocEpi: Health Inequality Analysis

Description Usage Arguments Value Examples

View source: R/smr_fun.R

The function smr calculates standardized mortality ratios (SMR) and confidence intervals for SMR.

1	smr(data, health, population, age, compare, sets, age_group = NULL, CI = 95)

`data`	Name of data set.
`health`	Health outcome of interest.
`population`	Population counts. Should correspond to data provided in `health`.
`age`	Variable that defines 5-year age groups, should be ordered and numeric, such as 1 through 18. If the age group coding starts with 0 it will be assumed that age groups 0 and 1-4 are separate. If the age group starts with 1, it will be assumed that the first age group is 0-4 (ages 0 and 1-4 are combined).
`compare`	Categorical variable that splits the data into groups that are to be compared, such as ethnicity.
`sets`	Groups that are to be compared (values taken by `compare`). The group listed first will be the reference category. Must take at least two values.
`age_group`	The age groups the standardized rates should be calculated for. By default the function calculates results for the following age groups: 0-14, 15-29, 30-44, 45-59, 60-74, 75+, 0-64 and all ages. User supplied age groups should be provided using the standard population groups as cut-offs, e.g. use `age_group=c("20-29", "30-39")` and not `c("19-30", "31-41")`. Open ended age groups can be supplied by giving a single age, e.g. "45" means 45 and above. Overlapping age groups, such as `c("20-29", "25-34")`, are not supported. Results for ages 0-64 and all ages will always be provided.
`CI`	Confidence intervals, 95 by default but can be set to any number between 0 and 100. For calculation method see user guide.

A data frame of standardized mortality ratios (SMR) and CIs.

d <- health_data

# Asian population compared to Scottish (reference)
smr(d, bad, pop, age, ethnicity, sets = c("Scot", "asian"))

# Asian, White British and Irish population compared to Scottish (reference)
smr(d, bad, pop, age, ethnicity, sets = c("Scot", "asian", "WB", "Irish"),
  age_group = c("15-29", "30-44"), CI = 99)