ahrq: Produces a comorbidity count based on the AHRQ comorbidity...

Description Usage Arguments Details Value Warning Author(s) References Examples

View source: R/ahrq.R

Description

This function take as input a data frame structured such that each row contains a list of ICD-9-CM codes attributed to a single patient. The function goes from row to row comparing the ICD-9-CM codes a patient has with the AHRQ comorbidity index diagnosis codes. If a patient has a diagnosis (as indicated by ICD-9-CM code) that belongs to one of the AHRQ diagnoses, then the patient is considered to have this diagnosis. Regardless of how many different ICD-9-CM codes a patient has corresponding to a particular comorbidity category, a comorbidity is only counted once.

Usage

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ahrq(input.frame)

Arguments

input.frame

This is a data frame with 5 character ICD-9-CM codes without decimal points. This can also be provided as a vector or matrix.

Details

The value returned consists of a vector and a data frames. The vector is the total comorbidity count. In the data frame returned each row in the data frame is devoted to a particular patient, and each column is a diagnosis. The data frame codes a 0 if the patient does not have that diagnosis and 1 if the patient does have that diagnosis.

The ICD-9-CM codes must be 5 characters long and have no decimal poinst.If any codes are less than 5 digits, then they must be led by zeroes or followed by the letter "X" to create a 5 character code. No more than 2 "X" ' s can be used at the tail end, or a meaningful ICD-9-CM code cannot be derived. If your ICD-9-CM codes contain decimals or some other filler character, then they must be converted to the format above for this function to work properly.

Value

A list of one vector and one data frames

COMORBIDITY.CT

A vector containing the number of comorbidtities for each patient

COMORBIDITIES

A data frame denoting which diagnoses each patient has with a 1

Warning

This function is deprecated. We recommend you switch to the more general cmrbdt.calc function instead.

Author(s)

Paul Gerrard, Max Gordon

References

Agency for Healthcare Research and Quality (2010) CREATION OF FORMAT LIBRARY FOR COMORBIDITY GROUPS COMORBIDITY SOFTWARE, VERSION 3.6 Available at: http://www.hcup-us.ahrq.gov/toolssoftware/comorbidity/comformat2011.txt Last accessed: 10/2/11

Examples

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x <- matrix(NA, nrow = 3, ncol = 2)
x[1,] <- c("41000", "42800")
x[2,] <- c("57220", "1961X")
x[3,1] <- "042XX"
x <- as.data.frame(x)
ahrq(x)

gforge/comorbidities.icd10 documentation built on May 17, 2019, 2:12 a.m.