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06-07-2022

Mapping PROMIS physical function and pain interference to the modified low back pain disability questionnaire

Auteurs: Nicolas R. Thompson, Brittany R. Lapin, Michael P. Steinmetz, Edward C. Benzel, Irene L. Katzan

Gepubliceerd in: Quality of Life Research

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Abstract

Purpose

The Modified Low Back Pain Disability Questionnaire (MDQ) is a commonly used tool to assess functioning of patients with low back pain (LBP). Recently, the Patient-Reported Outcomes Measurement Information System (PROMIS) was suggested as an alternative platform to assess LBP patient-reported health. We sought to map between the MDQ and PROMIS Physical Function (PROMIS-PF) and Pain Interference (PROMIS-PI) scales using multiple methods.

Methods

In a retrospective analysis of LBP patients seen at Cleveland Clinic 11/14/18–12/11/19, T-scores from each PROMIS scale were mapped to MDQ total score individually and together. MDQ item and total scores were mapped to each PROMIS scale. Linear regression as well as linear and equipercentile equating were used. Split sample internal validation using root mean squared error (RMSE), mean absolute error (MAE), and correlations were used to assess accuracy of mapping equations.

Results

13585 patients completed the three scales. In the derivation cohort, average age was 59.0 (SD = 15.8); 53.3% female and 82.9% white. Average MDQ total, PROMIS-PF, and PROMIS-PI T-scores were 40.3 (SD = 19.0), 37.2 (SD = 7.6), and 62.9 (SD = 7.2), respectively. For estimating MDQ total scores, methods that used both PROMIS-PF and PROMIS-PI had closest estimated means, lowest RMSE and MAE, and highest correlations. For estimating each of PROMIS-PF and PROMIS-PI T-scores, the best performing method was equipercentile equating using the MDQ items.

Conclusions

We created and internally validated maps between MDQ and PROMIS-PF and PROMIS-PI using linear regression, linear and equipercentile equating. Our equations can be used by researchers wishing to translate scores between these scales.
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Metagegevens
Titel
Mapping PROMIS physical function and pain interference to the modified low back pain disability questionnaire
Auteurs
Nicolas R. Thompson
Brittany R. Lapin
Michael P. Steinmetz
Edward C. Benzel
Irene L. Katzan
Publicatiedatum
06-07-2022
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-022-03174-3