WikiMSK:Calculators/Laslett Criteria

Laslett's "Clinical Prediction Rule 5" for predicting positive screening medial branch block
Criteria	Points	Present
Age > 50	1
Symptoms best walking	1
Symptoms best sitting	1
Onset pain is paraspinal	1
Positive extension/rotation test	1
Probability	Negative (0)

3 or more criteria has a positive likelihood ratio of 9.7 (5.0, 18.8) and negative likelihood ratio of 0.17 (0.05, 0.60) for positive initial screening medial branch block^[1]

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References

↑ Laslett M, McDonald B, Aprill CN, Tropp H, Oberg B. Clinical predictors of screening lumbar zygapophyseal joint blocks: development of clinical prediction rules. Spine J. 2006 Jul-Aug;6(4):370-9. doi: 10.1016/j.spinee.2006.01.004. PMID

[1] Laslett M, McDonald B, Aprill CN, Tropp H, Oberg B. Clinical predictors of screening lumbar zygapophyseal joint blocks: development of clinical prediction rules. Spine J. 2006 Jul-Aug;6(4):370-9. doi: 10.1016/j.spinee.2006.01.004. PMID

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