scoreFANLTC: Score the FANLTC

In raybaser/FACTscorer: Scores the FACT and FACIT Family of Patient-Reported Outcome Measures

Score the FANLTC

Description

Generates all of the scores of the Functional Assessment of Non-Life Threatening Conditions (FANLTC) from item responses.

Usage

scoreFANLTC(df, id = NULL, updateItems = FALSE, keepNvalid = FALSE)

Arguments

df	A data frame with the questionnaire items, appropriately-named.
id	(optional) The quoted name of a variable in df with a unique value for each row of df. If an id variable is provided here, it will also be included with the scale scores in the output data frame. This can facilitate accurate merging of the scale scores back into the input df.
updateItems	(optional) Logical, if TRUE then updated versions of the items (i.e., re-coded for score calculation) will be returned in the output data frame with the scale scores. The default, FALSE, does not save any updated versions of the items in the resulting data frame. Most users will want to omit this argument or, equivalently, set it to FALSE.
keepNvalid	(optional) Logical, if TRUE then the output data frame will have additional variables containing the number of valid, non-missing responses from each respondent to the items on a given scale (see Details). If FALSE (the default), these variables will not be in the returned data frame. Most users will want to omit this argument or, equivalently, set it to FALSE.

Details

Given a data frame that includes all of the FANLTC items as variables, appropriately named, this function generates all of the FANLTC scale scores. It is crucial that the item variables in the supplied data frame are named according to FACT conventions. For example, the first physical well-being item should be named GP1, the second GP2, and so on. Please refer to the materials provided by http://www.facit.org for the particular questionnaire you are using. In particular, refer to the left margin of the official questionnaire (i.e., from facit.org) for the appropriate item variable names.

Most users will want to omit the updateItems and keepNvalid arguments or, equivalently, set them both to FALSE. For more details on these arguments, see the documentation entry for scoreFACTG and FACTscorer.

Value

A data frame with the following scale scores is returned:

• PWB - Physical Well-Being subscale

• SWB - Social/Family Well-Being subscale

• EWB - Emotional Well-Being subscale

• FWB - Physical Well-Being subscale

• FANLTC - FANLTC Total Score (PWB+SWB+EWB+FWB)

If a variable was given to the id argument, then that variable will also be in the returned data frame. Additional, relatively unimportant, variables will be returned if updateItems = TRUE or keepNvalid = TRUE.

Note

Keep in mind that this function (and R in general) is case-sensitive.

All variables should be in numeric or integer format.

This scoring function expects missing item responses to be coded as NA, 8, or 9, and valid item responses to be coded as 0, 1, 2, 3, or 4. Any other value for any of the items will result in an error message and no scores.

References

FANLTC Scoring Guidelines, available at http://www.facit.org

Cella, D., & Nowinski, C. J. (2002). Measuring quality of life in chronic illness: The functional assessment of chronic illness therapy measurement system. Archives of Physical Medicine and Rehabilitation, 83, Supplement 2, S10–S17.

See Also

See FACTscorer for more comprehensive information about using the functions in this package. This function is very similar to the scoreFACTG function. See the documentation for scoreFACTG for more details on the arguments and for examples. For brevity, examples are omitted below, but can be accessed by running example(scoreFANLTC).

Examples

raybaser/FACTscorer documentation built on March 29, 2022, 7:50 p.m.