Trokos

Test library › Low back & pelvis

Kemp's / lumbar quadrant test

For: Facet joint pain

Pain from the facet joints, the small paired joints at the back of each level of the spine. No single pattern reliably identifies it, though pain on leaning backwards and twisting is often attributed to it.

A weak test on its own
Sensitivity45%
Specificity47%
LR+ (positive)0.86
LR− (negative)1.16

Likelihood ratios as published by the review (Table 3, double diagnostic blocks).

What the numbers mean

  • Positive result: points slightly the wrong way: a positive result makes the diagnosis a little less likely.
  • Negative result: points slightly the wrong way: a negative result makes the diagnosis a little more likely.

Source

Stuber K, Lerede C, Kristmanson K, Sajko S, Bruno P. The diagnostic accuracy of the Kemp's test: a systematic review. J Can Chiropr Assoc. 2014;58(3):258–267. PubMed · systematic review

Figures as they will appear in Rule It In, Rule It Out (Trokos, forthcoming). If a newer or better study changes them, this page changes with the book. Figures last updated from the book on 2 October 2026.

Get the book for telling radicular leg pain from referred pain, and knowing when cauda equina means send now

This page gives the published figures. Rule It In, Rule It Out adds how to do this test, what counts as positive, how to read the result, and, where studied, whether combining it with other tests helps.

Coming in late 2026 as a PDF and a paperback. Join the list to hear when it's out

One study, one test, once a month

Rule It In is a free evidence letter for musculoskeletal clinicians: one recent study explained, one examination test with its real numbers. From Trokos, publisher of Rule It In, Rule It Out.

Get the newsletter