Purpose: To identify patients presenting with knee osteoarthritis who will respond favorably to hip mobilization.
Rule:
1. Hip or groin pain or paresthesia
2. Anterior thigh pain
3. Passive knee flexion less than ~120 degrees
4. Passive hip medial (internal) rotation less than 17 degrees
5. Pain with hip distraction
| Item | 1+ variable | 2 + variables |
| SN | ||
| SP | ||
| +LR | 5.1 | 12.9 |
| -LR | ||
| POS | 92% | 97% |
SN = sensitivity – ‘SnOut’ helps rule out a disease (higher number is better – >0.9 is excellent)
SP = Specificity – ‘SpIn’ helps rule in a disease (higher number is better – greater than 0.90 is excellent))
+LR = positive likelihood ratio – ratio of positive test results in a patients with the pathology (true positives) higher number is better (> 10 is excellent)
-LR = negative likelihood ratio – ratio of negative test results in a patients with the pathology (false negatives) lower number is better (< 0.1 is excellent)
POS = Probability of success – positive treatment outcome
References:
1. Currier LL, et al. Development of a Clinical Prediction Rule to Identify Patients With Knee Pain and Clinical Evidence of Knee Osteoarthritis Who Demonstrate a Favorable Short-Term Response to Hip Mobilization. Physical Therapy. 2007; 87(9): 1106–1119.
