Purpose: Identify patients with low back pain who likely will respond favorably to mechanical lumbar traction.

Stage of CPR Development: Derivation.


1. FABQ-W score < 21
2. No neurological deficit involvement
3. Age older than 30
4. Non-manual work job status


Variables Sensitivity Specificity +LR Prob of Success
3 0.76 0.75 3.04 42.2%
4 0.36 0.96 9.36 69.2%


1. Cai C, et al. A clinical prediction rule for classifying patients with low back pain who demonstrate short-term improvement with mechanical lumbar traction. Eur Spine J. 2009; 18(4): 554-61.

2. Fritz JM, et al. Is there a subgroup of patients with low back pain likely to benefit from mechanical traction? Results of a randomized clinical trial and subgrouping analysis. Spine. 2007; 32(26): E793-800.

Continued Learning…

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Continued Reading…


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1 comment

  1. Hey John,

    Love your collection of CPR’s here. I’m prepping for the OCS and was taking a look at this CPR. It looks like the one you have depicted is just the first article by Cai. The factors are completely different from the Fritz study. Why did you choose to post the ones by Cai? Thanks!



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