Commit 28be1ee2 authored by mabrook's avatar mabrook
Browse files

updating readme

parent 68f71669
......@@ -7,8 +7,7 @@ output: md_document
# WIHS Data Set #
This package contains data from the Women's Interagency HIV Study (WIHS).
The WIHS is an ongoing observational cohort study with semiannual visits at 10 sites in the US.
The Women’s Interagency HIV Study (WIHS) is an ongoing observational cohort study with semiannual visits at 10 sites in the US. For some details see (1). This WIHS data was used by Lau et al in a 2009 paper on competing risks, see (2), and is available online. The ART variable can be used as a competing event time. Times here are measured in decimals (or Colombian time), such that 365.25 days is 1.000 years. There is one ASCII data set. There is one record per patient and the data set is called wihs2009.14mar17.dat. Codebook is provided in table below.
### Installation
......@@ -36,6 +35,8 @@ knitr::opts_chunk$set(echo = TRUE)
* `age` = years of age on 12/6/1995
* `cd4` = CD4 count in cells/mm^3 measured at last visit before 12/6/1995
* `art` = time from 12/6/1995 to ART initiation (missing is censored)
* `study_end` = time from 12/6/1995 to end of study (10 years for everyone)
* `dropout` = time until patient is lost to follow-up (missing is censored)
* `aids_death` = time from 12/6/1995 to first of AIDS or death (missing is censored)
* `aids_death_art` = time from 12/6/1995 to first of AIDS, death, or ART initiation (missing is censored)
* `j` = indicator that `aids_death_art` is time until `art`
......@@ -44,5 +45,10 @@ knitr::opts_chunk$set(echo = TRUE)
### Notes ###
* There is one record per patient.
* The ART variable can be used as a competing event time.
* The `art` variable can be used as a competing event time.
* Times here are measured in decimals (or Colombian time), such that 365.25 days is 1.000 years.
### References
1. Barkan SE, Melnick SL, Preston-Martin S, et al. The Women's Interagency HIV Study. WIHS Collaborative Study Group. Epidemiology 1998;9(2):117-25.
2. Lau B, Cole SR, Gange SJ. Competing risk regression models for epidemiologic data. Am J Epidemiol 2009;170(2):244-56.
WIHS Data Set
=============
This package contains data from the Women's Interagency HIV Study
(WIHS). The WIHS is an ongoing observational cohort study with
semiannual visits at 10 sites in the US.
The Women’s Interagency HIV Study (WIHS) is an ongoing observational
cohort study with semiannual visits at 10 sites in the US. For some
details see (1). This WIHS data was used by Lau et al in a 2009 paper on
competing risks, see (2), and is available online. The ART variable can
be used as a competing event time. Times here are measured in decimals
(or Colombian time), such that 365.25 days is 1.000 years. There is one
ASCII data set. There is one record per patient and the data set is
called wihs2009.14mar17.dat. Codebook is provided in table below.
### Installation
......@@ -22,6 +27,10 @@ You can install the package from Bitbucket
- `cd4` = CD4 count in cells/mm^3 measured at last visit before
12/6/1995
- `art` = time from 12/6/1995 to ART initiation (missing is censored)
- `study_end` = time from 12/6/1995 to end of study (10 years
for everyone)
- `dropout` = time until patient is lost to follow-up (missing
is censored)
- `aids_death` = time from 12/6/1995 to first of AIDS or death
(missing is censored)
- `aids_death_art` = time from 12/6/1995 to first of AIDS, death, or
......@@ -31,6 +40,14 @@ You can install the package from Bitbucket
### Notes
- There is one record per patient.
- The ART variable can be used as a competing event time.
- The `art` variable can be used as a competing event time.
- Times here are measured in decimals (or Colombian time), such that
365.25 days is 1.000 years.
### References
1. Barkan SE, Melnick SL, Preston-Martin S, et al. The Women's
Interagency HIV Study. WIHS Collaborative Study Group.
Epidemiology 1998;9(2):117-25.
2. Lau B, Cole SR, Gange SJ. Competing risk regression models for
epidemiologic data. Am J Epidemiol 2009;170(2):244-56.
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment