EQ-5D is a standardised measure of health status developed by the EuroQol Group to provide a simple, generic measure of health for clinical and economic appraisal. [...] The EQ-5D-3L descriptive system comprises the following five dimensions, each describing a different aspect of health: MOBILITY, SELF-CARE, USUAL ACTIVITIES, PAIN / DISCOMFORT and ANXIETY / DEPRESSION. (EQ-5D User Guide)

scoring_eq5d3l(data, items = 1:5, keep = TRUE, nvalid = 5, digits = NULL)

Arguments

data

a data.frame containing the EQ-5D-3L items orderd from 1 to 5

items

A character vector with the EQ-5D-3L item names ordered from 1 to 5, or a numeric vector indicating the column numbers of the EQ-5D-3L items in data.

keep

Logical, whether to keep the single items and whether to return variables containing the number of non-missing items on each scale for each respondent. The default is TRUE.

nvalid

A numeric value indicating the number of non-missing items required for score calculations. The default is 5.

digits

Integer of length one: value to round to. No rounding by default.

Value

The function returns 2 variables:

  • nvalid.eq5d3l: Number of valid values (MAX=5)

  • score.eq5d3l: EQ-5D-3L Index Score (TTO method)

Details

  • Number of items: 5

  • Item range: 1 to 3

  • Reverse items: none

  • Score range: 0 to 1

  • Cut-off-values: none

  • Minimal clinically important difference: none

  • Treatment of missing values: The Index Score is calculated if none of the five items is missing.

Note

The scoring algorithm uses the TTO value set for Germany

References

Janssen et al (2012) (https://dx.doi.org/10.1007/s11136-012-0322-4)

EQ-5D User Guide (https://euroqol.org/wp-content/uploads/2018/12/EQ-5D-3L-User-Guide_version-6.0.pdf)

Examples

if (FALSE) { library(dplyr) items.eq5d3l <- paste0("eq5d3l_", seq(1, 5, 1)) scoring_eq5d3l(mydata, items = items.eq5d3l) }