How is the patellar tilt test performed, what findings indicate a positive result, and what conservative management is recommended for a positive test?

Patellar Tilt Test

Test Performance

The patellar tilt test is performed with the patient supine and the knee in full extension (0 degrees). The examiner attempts to elevate the lateral edge of the patella away from the lateral femoral condyle while keeping the medial edge fixed. A positive test occurs when the lateral patellar edge cannot be elevated to a neutral (horizontal) position or beyond, indicating tight lateral retinacular structures and potential patellar maltracking 1, 2.

Key Technical Points:

• Patient positioned supine with quadriceps relaxed
• Knee in full extension
• Examiner palpates and attempts to lift the lateral patellar border
• Compare bilaterally for asymmetry

Interpretation of Findings

The test demonstrates fair intrarater reliability (kappa 0.44-0.50) but poor interrater reliability (kappa 0.20-0.35), meaning results should be interpreted cautiously and not used in isolation 1.

Diagnostic Accuracy:

• Sensitivity: <50% (will miss many cases of patellofemoral pain syndrome)
• Specificity: 72-100% (when positive, reasonably specific for the condition)
• Positive likelihood ratio: 5.4 - suggests moderate diagnostic value when positive 2, 3
• Negative likelihood ratio: 0.6 - a negative test does not rule out pathology 2

The patellar tilt test shows acceptable diagnostic accuracy (AUC ≥70%) and is more useful than plain radiography for identifying patellofemoral dysfunction 4, 3.

Conservative Management for Positive Test

When the patellar tilt test is positive, initiate knee-targeted exercise therapy combined with patient education as the primary intervention 5. This approach directly addresses the underlying biomechanical dysfunction causing lateral patellar tilt.

Primary Treatment Algorithm:

1. Exercise Therapy (Foundation)

   • Eccentric strengthening exercises targeting the quadriceps, particularly vastus medialis obliquus
   • Hip strengthening exercises (hip abductors and external rotators) to address proximal control
   • Progressive loading over 6-12 weeks 6, 5

2. Education (Essential Component)

   • Explain the mechanism of patellar maltracking
   • Activity modification to avoid pain-provoking positions
   • Load management principles
   • Expected timeline for improvement 5

3. Relative Rest

   • Reduce repetitive loading activities that provoke symptoms
   • Avoid complete immobilization
   • Maintain pain levels below 3/10 during activities 6

Supporting Interventions (Add Based on Individual Presentation):

Select from the following based on specific patient needs:

• Patellar taping: Apply McConnell taping to medialize the patella and reduce lateral tilt during exercise progression 5

• Manual therapy: Lateral retinacular stretching and soft tissue mobilization to address tight lateral structures 5

• Prefabricated foot orthoses: If excessive foot pronation is present (navicular drop >10mm) 5, 4

• Movement retraining: Correct dynamic knee valgus during functional activities like squatting and stair descent 5

Pharmacological Adjuncts:

• NSAIDs: Short-term use (7-14 days) for acute pain relief only; no long-term benefit on outcomes 6
• Topical NSAIDs: Preferred over oral to minimize systemic effects 6
• Avoid corticosteroid injections: May provide short-term relief but no long-term benefit and potential tendon weakening 6

Timeline and Monitoring:

• Expect gradual improvement over 6-12 weeks with consistent exercise
• If no improvement after 3-6 months of conservative therapy, consider surgical consultation 6
• Monitor for development of patellofemoral osteoarthritis, as PFP is a known precursor 5

Critical Pitfall:

Do not rely solely on the patellar tilt test for diagnosis due to its poor interrater reliability 1. Combine findings with other clinical tests (palpation test, eccentric step test, squatting test) and functional assessment. The combination of positive stair descending test (pain 3-10/10) and prolonged sitting test (pain 6-10/10) provides the strongest diagnostic accuracy with a positive likelihood ratio of 19.47 4.