Knee Function and Pain Related to Psychological Variables in Patients With Long-Term Patellofemoral Pain Syndrome

Roar Jensen, Torill Hystad, Anders Baerheim

DOI: 10.2519/jospt.2005.2119

Study Design: Nonexperimental, descriptive study, including 2 independent samples. Objectives: To assess the levels of mental distress and self-perceived health in subjects with long-term patellofemoral pain syndrome (PFPS) compared to a group of healthy subjects, and the relationship between knee function and knee pain to these psychological variables. Background: Psychological variables and those describing self-perceived health status have been given little focus in PFPS research. Methods and Measures: One group of 25 men and women between 19 and 44 years of age with unilateral long lasting PFPS, and a control group (n = 23) of healthy subjects (age range, 18-44 years) participated in the study. Knee function was assessed with the use of the Cincinnati Knee Rating System (CKRS) and the triple jump test, and knee pain was measured by a visual analogue scale (VAS). Self-perceived health and mental distress were assessed with the Coop Wonca Chart and the Hopkins Symptoms Checklist-25 (HSCL-25) questionnaire. Results: The mean (±SD) score on the Coop-Wonca Chart was 2.02 ± 0.73 in the PFPS group, compared to 1.20 ± 0.53 in the controls (P<.001). HSCL-25 mean (±SD) scores were 1.46 ± 0.47 and 1.08 ±0.18 (P<.001) for the PFPS and the control group, respectively. When analyzed with correlation statistics, CKRS and VAS scores were found to correlate to those of the Coop-Wonca Chart and HSCL-25 scores. Conclusion: Levels of mental distress were higher in the group with PFPS than in the control group, while levels of self-perceived health were lower. Our data indicate that the levels of knee pain and knee function correlate closely to the degree of mental distress and self-perceived health in individuals with PFPS.

J Orthop Sports Phys Ther. 2005;35(9):594-600. doi:10.2519/jospt.2005.2119

Key Words: anterior knee pain, personality, psychological counseling, psychology

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