# --------------------------------------------
# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
# --------------------------------------------
 
cff-version: 1.2.0
message: 'To cite package "TwoDcDAPSA" in publications use:'
type: software
license: MIT
title: 'TwoDcDAPSA: Calculate TwoDcDAPSA: PROs-Joint Contrast (PJC) and Swollen–Tender
  Joints Contrast (STC) Scores and Quartiles'
version: 0.1.1
doi: 10.32614/CRAN.package.TwoDcDAPSA
abstract: 'Provides a calculator for the two-dimensional clinical Disease Activity
  index for Psoriatic Arthritis (TwoDcDAPSA), a principal component-derived measure
  that complements the conventional clinical DAPSA score. TwoDcDAPSA captures residual
  variation in patient-reported outcomes (pain and patient global assessment) and
  joint counts (swollen and tender) after adjusting for standardized cDAPSA using
  natural spline coefficients derived from published models. Residuals are standardized
  and combined with fixed principal component loadings to yield two continuous component
  scores: the PROs-Joint Contrast (PJC) and the Swollen–Tender joints Contrast (STC),
  along with quartile-based groupings (including optional combined quartile groupings).
  The package applies pre-specified coefficients, residual standardization, and loadings
  to new datasets but does not estimate spline models or principal components itself.'
authors:
- family-names: Meng
  given-names: Ning
  email: nmeng2@jh.edu
- family-names: Kim
  given-names: Ji Soo
- family-names: Orbai
  given-names: Ana-Maria
- family-names: Zeger
  given-names: Scott L.
repository: https://lemonade0924.r-universe.dev
commit: 5219f18b051b93c0d552c7ec585295ef2e53aef7
date-released: '2026-02-26'
contact:
- family-names: Meng
  given-names: Ning
  email: nmeng2@jh.edu