Scoring BPD-MS Measures

Scoring

• When data are collected through REDCap, BPD-MS CATs and fixed short forms are automatically scored as they are being administered.  Addition of the LBP-HRQOL measure to REDCap is expected in summer 2023. There is no timeline for the addition of the AD-HRQOL and LBP-ADL measures to REDCap at this time.

• When data are collected on paper or in data collection systems other than REDCap, scoring of  BPD-MS fixed short forms can be calculated by using look-up tables to transform a raw score to a T-score.  T-score distributions rescale raw scores into standardized scores with a mean of 50 and a standard deviation (SD) of 10. For adults, a clinical reference population (spinal cord injury) was used for all BPD-MS measures. You can find look-up tables in the User Manual.

• The LBP-HRQOL short form can also be scored with the Assessment Center Scoring Service.  This software application enables item response theory (IRT) calculated scoring of any short form, fixed or custom. The Scoring Service accepts a user’s data file and produces a scored output file containing Theta, a T-score, and a standard error for each respondent. This service allows for more accurate scoring of the LBP-HRQOL measure collected on paper or in data collection systems other than REDCap. The Assessment Center Scoring Service may be accessed from www.assessmentcenter.net and by clicking on the "Scoring Service" button on the right of the page.  Addition of this measure to the scoring service is expected to occur in summer 2023.

• Important: A higher BPD-MS T-score represents more of the concept being measured. For the BPD-MS measures, a T-score of 60 is worse than the averaged reference population (adults with spinal cord injury). 

• Custom short forms cannot be scored using the provided look-up tables. For information on creating and scoring a custom short form, please contact the study team at [email protected].

• For a more in-depth explanation on scoring, including instructions on how to approximate a score if a participant skips questions, please refer to the User Manual.