Calculate Results from WHO Model Disability Survey Data

The Model Disability Survey (MDS) < https://www.who.int/activities/collection-of-data-on-disability> is a World Health Organization (WHO) general population survey instrument to assess the distribution of disability within a country or region, grounded in the International Classification of Functioning, Disability and Health < https://www.who.int/standards/classifications/international-classification-of-functioning-disability-and-health>. This package provides fit-for-purpose functions for calculating and presenting the results from this survey, as used by the WHO. The package primarily provides functions for implementing Rasch Analysis (see Andrich (2011) ) to calculate a metric scale for disability.

whomds

Introduction

This package provides fit-for-purpose functions for calculating and presenting the results from the Model Disability Survey, as used by the World Health Organization.

The Model Disability Survey (MDS) is a World Health Organization (WHO) general population survey instrument to assess the distribution of disability within a country or region, grounded in the International Classification of Functioning, Disability and Health. For more information, please go to https://www.who.int/health-topics/disability

Installation

You can install the release version of the package from CRAN with:

install.packages("whomds")

You can install the development version from GitHub with:

# install.packages("devtools")
devtools::install_github("lindsayevanslee/whomds", build_vignettes = TRUE)

Example

A Rasch model can be used with the function rasch_mds(), like so:

library(whomds)

start <- rasch_mds(
  df = df_adults, 
  vars_metric = paste0("EF", 1:12),
  vars_id = "HHID", 
  vars_DIF = c("sex", "age_cat"),
  resp_opts = 1:5, 
  max_NA = 2,
  print_results = TRUE,
  path_parent = "/Users/lindsaylee/Desktop/",
  model_name = "Start",
  testlet_strategy = NULL,
  recode_strategy = NULL,
  drop_vars = NULL,
  split_strategy = NULL,
  comment = "Initial run"
)

More information

An extensive guide on using the package is available from a series of vignettes, in both English and Spanish. You can browse the vignettes by using:

browseVignettes("whomds")

Contact

Please contact the package maintainer with any questions or comments, or submit an issue.