Package: possum
Type: Package
Title: Surgical Risk Prediction with the POSSUM Score Family
Version: 0.1.0
Authors@R: c(
    person("Christos", "Longros", email = "chris.longros@gmail.com",
           role = c("aut", "cre"),
           comment = c(ORCID = "0009-0001-2717-0857")),
    person("Daniel Enrique", "Chourio Barboza", role = "aut"))
Description: Computes the Physiological and Operative Severity Score for the
    enUmeration of Mortality and morbidity (POSSUM), its Portsmouth
    modification (P-POSSUM), and the colorectal (CR-POSSUM), vascular
    (V-POSSUM) and ruptured aortic aneurysm (RAAA-POSSUM) variants,
    risk-adjustment systems used in surgical audit. Functions map
    physiological and operative variables to their
    component scores and return the predicted probabilities of morbidity and
    mortality from the published logistic equations. The coefficients follow
    Copeland and others (1991) <doi:10.1002/bjs.1800780327> for POSSUM,
    Prytherch and others (1998) <doi:10.1046/j.1365-2168.1998.00840.x> for
    P-POSSUM, Tekkis and others (2004) <doi:10.1002/bjs.4430> for the
    colorectal variant (CR-POSSUM), and Neary and others (2003)
    <doi:10.1002/bjs.4041> for the vascular variant (V-POSSUM). The
    package is intended for audit and research; it is not a
    validated medical device and must not be used as the sole basis for
    clinical decisions.
License: MIT + file LICENSE
Encoding: UTF-8
URL: https://github.com/chrislongros/possum
BugReports: https://github.com/chrislongros/possum/issues
Imports: stats
Suggests: tinytest
Config/roxygen2/version: 8.0.0
NeedsCompilation: no
Packaged: 2026-07-18 10:23:31 UTC; chris
Author: Christos Longros [aut, cre] (ORCID:
    <https://orcid.org/0009-0001-2717-0857>),
  Daniel Enrique Chourio Barboza [aut]
Maintainer: Christos Longros <chris.longros@gmail.com>
Repository: CRAN
Date/Publication: 2026-07-28 14:30:07 UTC
Built: R 4.7.0; ; 2026-07-28 23:51:10 UTC; windows
