Date of Award

Fall 2011

Degree Type


Degree Name

Master of Science Rehabilitation Science (MSc)


Rehabilitation Science


Joy MacDermid


Jill Hayden



Committee Member

Linda Woodhouse



The purpose of this study was to determine what cut-off of the Orebro Musculoskeletal Pain Screening Questionnaire score will best differentiate workers with acute musculoskeletal injuries at-risk for delayed return to work (greater than 3 months), in a population of workers of less than 3 weeks injury duration.

Study Design:

Retrospective cohort design, using a sample of convenience.


A sample of 259 consecutive WCB patients seeking assessment and treatment at a multidisciplinary rehabilitation facility were reviewed, with 152 meeting the inclusion criteria of having sustained a soft tissue injury within 3 weeks of initial assessment. Descriptive statistics, tests of difference between Time 1 and Time 2 OMPSQ scores and Receiver Operator Characteristic curves were generated. The method of determining predictive ability of the OMPSQ at two points in time was by means of ROC analysis.


This study determined that the OMPSQ is moderately predictive of failure to achieve timely return to work (RTW) in a population of injured workers with acute musculoskeletal soft tissue injuries, when assessed two-weeks after treatment is initiated, and less predictive at the initial intake into treatment. Delayed RTW was defined as those workers who had not returned to their pre-injury job full time by 90 days, due to reduced functional ability as it related to their pre-injury occupation.


This study demonstrates that there is variability in cut-off scores across studies. Future research should attempt to define cut-off scores as they relate to the population , outcome, condition and time-frame of interest .

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