scoring_bdi: Scoring the Beck Depression Inventory (BDI and BDI-II)

In nrkoehler/qscorer: Procedures for Scoring Health-related Questionnaires

Description

Scoring the Beck Depression Inventory (BDI and BDI-II)

Usage

scoring_bdi(
  data,
  items = 1:21,
  keep = TRUE,
  nvalid = 17,
  digits = NULL,
  version = "BDI-II"
)

Arguments

data	a data.frame containing the BDI items orderd from 1 to 21
items	A character vector with the BDI item names ordered from 1 to 21, or a numeric vector indicating the column numbers of the BDI 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 17.
digits	Integer of length one: value to round to. No rounding by default.
version	A character vector with the BDI version, either "BDI-I" or "BDI-II" (default)

Details

• Number of items: 21

• Item range: 0 to 3

• Reverse items: none

• Score range: 0 to 63

• Cut-off-values:

  • BDI: ≤ 10 = "minimal"; 11 to 18 = "mild"; 19 to 29 = "moderate"; ≥ 30 = "severe"

  • BDI-II: ≤ 8 = "none", 9 to 13 = "minimal"; 14 to 19 = "mild"; 20 to 28 = "moderate"; ≥ 29 = "severe"

• Minimal clinically important difference: none

• Treatment of missing values: Questionnaires with up to four missing values are scored, replacing any missing values with the average score of the completed items.

Value

The function returns 4 variables:

• nvalid.bdi: Number of valid values (MAX=21)

• score.bdi: BDI score

• cutoff.bdi: BDI as categorical variable

• cutoff.bdi2: BDI-II as categorical variable

References

Beck et al. 1961 (https://doi.org/10.1001%2Farchpsyc.1961.01710120031004)

Beck et al. 1996 (https://doi.org/10.1207%2Fs15327752jpa6703_13)

Examples

## Not run: 
library(dplyr)
items.bdi <- paste0("bdi_", seq(1, 21, 1))
scoring_bdi(mydata, items = items.bdi, version = 'BDI-I')

## End(Not run)

nrkoehler/qscorer documentation built on April 5, 2020, 3:09 a.m.