Abstract
Introduction: Health care professionals use measures of pain and impairment to identify potential disability and subsequently to predict workers’ ability to do their work. However, there is little evidence that measures used are associated with ability to do one’s job. Methods: A cross-sectional study was conducted. Nurses (n = 100) were classified into either off/modified work (due to LBP) or regular work groups. Trunk ROM, trunk muscular endurance, pain and disability were measured relative to the outcomes work status and Work Limitations Questionnaire (WLQ) score. Results: Regression analyses which included Roland Morris Questionnaire (RMQ, disability) and Sørenson (back extensor endurance) in the final models correctly classified the work status of 87% of the participants and accounted for 60% of variance in the WLQ score. Conclusions: Use of the RMQ and Sørenson test as diagnostic and prognostic tools should be considered in assisting return to work and treatment decision-making in female nurses with LBP.
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Acknowledgements
This project was funded by Sunnybrook & Women’s Practice Based Research Award as well as the Orthopaedic & Arthritic Institute Musculoskeletal Research Program. Special thanks to all the Sunnybrook & Women’s College Health Sciences Centre nurses that participated and promoted this study in difficult times.
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Appendix: Physical performance measures
Appendix: Physical performance measures
Trunk range of motion measures:
The Modified Schöber and the Beattie extension measures for lumbar flexion and extension were performed as described by Moll and Wright [26] and Beattie et al. [27] respectively.
Trunk static endurance measures:
Subjects were informed that all trunk endurance tests were timed tests until fatigue. Before each endurance test, criteria for terminating the test were explained to the subject. Criteria included; subject unable to continue due to fatigue, subject terminating the test due to pain or other symptoms, and the rater terminating the test if the subject could not maintain the test position. The test position was described and demonstrated, and the subject instructed to maintain the test position as long as possible.
Sørenson test
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The Sørenson test for extensor static endurance was performed with the subject positioned prone on treatment bed and the iliac crests level with the upper edge of the bed. The lower half of the body was secured to the treatment bed by means of 3 straps at the level of the greater trochanter, at the knee crease and at the malleolar level of the ankles. A pillow was placed on the bed under the ankles and legs and the 3 straps tightened as firmly as possible, considering the subject’s comfort level. The subject placed her hands on the floor, 40 cm below the top of the treatment bed.
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The subject was instructed to place her hands across her chest and maintain her upper body in a position level with the lower body, i.e. parallel to the floor.
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A small-suspended sac, with a 2.5-cm ribbon hanging off the end, was placed between the scapulae, controlling the horizontal position during the test. The subject was notified if the position was not maintained, i.e. the trunk was no longer in contact with the ribbon. The rater asked the subject to resume a level position with her trunk once, if this could not be successfully maintained the test was terminated.
Static flexion endurance test
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The subject was positioned in crook lying with knees flexed to 90°, feet flat on bed and arms by their side.
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The rater placed her middle finger at the edge of the subject’s inferior scapular angle. The subjects were asked to roll up so their fingertips glided up their thighs towards the knees. When the inferior angle of the scapula came off the treatment bed the subject was asked to stop and the level on the thigh reached was marked with the assessor’s finger. The subject was asked to lie back down and the distal edge of a piece of 1/2 inch adhesive tape was placed on the thigh at the fingertip mark.
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The subjects were asked to curl up until their fingertips touched the tape and maintain that position. When the fingertips lost contact with the tape the test was ended.
Static side bridge endurance test
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The side bridge test performed was a modification of the original test described by McGill et al. [60]. The subject was positioned in side lying, resting on a pronated forearm with the elbow placed under shoulder level. The legs were together, knees bent to 90°, and hips flexed no more than 20°.
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The subjects were instructed that their body weight was to be supported on the forearm and outside of the leg. As they raised their hip off the bed a straight line was formed between the knees, hips and the shoulders. The non-supporting arm was held across the chest with the hand placed on the opposite shoulder. The rater’s hand was placed on the bed directly under the greater trochanter.
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The subject was notified if the hip touched the rater’s hand. The rater asked the subject to resume a level position with their trunk once, if this could not be successfully maintained the test was terminated.
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Denis, S., Shannon, H.S., Wessel, J. et al. Association of Low Back Pain, Impairment, Disability & Work Limitations in Nurses. J Occup Rehabil 17, 213–226 (2007). https://doi.org/10.1007/s10926-007-9065-4
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DOI: https://doi.org/10.1007/s10926-007-9065-4