Convert a PROMIS summed score to a T-score via a lookup table

The other official PROMIS scoring path for a full short form: map the summed raw score to a T-score with the instrument's published summed-score-to-T-score table. The table is not bundled - obtain it from the HealthMeasures scoring manual for the specific short form.

Usage

promisRawToT(raw, conversion_table)

Arguments

raw

Summed raw score.

conversion_table

A data.frame with a raw column, a tscore column and optionally an se column (the published conversion table).

Value

A list with tscore and se (NA if the table has no se column); NA with a warning if raw is not in the table.

See also

scorePROMIS()

Examples

tab <- data.frame(raw = 4:8, tscore = c(21.5, 30.1, 35.7, 40.2, 44.0))
promisRawToT(6, tab)
#> $tscore
#> [1] 35.7
#> 
#> $se
#> [1] NA
#>