Radiographic Assessment Of Morphometric Knee Angles in Patellofemoral Pain Syndrome: A Quantitative Cross-Sectional Study

Authors

• Sandhya Nagolu, Saveetha Medical College and HospitalFollow
• Lavanya Prathap, Saveetha Medical College and HospitalFollow
• Subhadra Devi Velichety, S.V. Medical CollegeFollow
• Jeyakumar S, Garden City UniversityFollow
• K.Venkata Naga Prahalada, Kasturi College of PhysiotherapyFollow

Abstract

Purpose: Patellofemoral Pain Syndrome (PFPS) is one of the most common causes of anterior knee pain, but its radiographic diagnostic indicators are still not clearly defined. This study aimed to evaluate key radiographic morphometric parameters, including Q angle, sulcus angle, patellar tilt angle, and Insall–Salvati ratio in individuals with PFPS compared with healthy controls and to determine their association with anthropometric variables. Methods: A quantitative cross-sectional study was carried out involving 110 individuals diagnosed with patellofemoral pain syndrome (PFPS) and 110 age- and sex-matched asymptomatic controls. Standardised digital radiographs were analysed using INSTARISPACS software to obtain morphometric measurements. Statistical analyses were performed using the Mann–Whitney U test, Pearson’s correlation coefficient, and multiple linear regression to evaluate group differences and variable associations. Results: PFPS patients showed significantly higher Q Angle (p < 0.001, r = 0.9134) and Patellar Tilt Angle (p < 0.001, r = 0.8072), indicating strong diagnostic value. Sulcus Angle was moderately elevated (p < 0.001, r = 0.3574). Insall–Salvati Ratio and BMI showed no significant differences. Height and weight were lower in PFPS patients but did not independently predict diagnosis. Multivariate analysis confirmed Q Angle and Patellar Tilt Angle as key predictors (R² = 0.732). Conclusion: Radiographic measurements, particularly Q Angle and Patellar Tilt Angle, are reliable indicators of PFPS. Structural alignment plays a more critical role than body composition. Further longitudinal studies are recommended to validate these markers for early detection and intervention.

Author Bio(s)

Ms Sandhya Nagolu, is a Research Scholar in the Department Of Anatomy at Saveetha Medical College and Hospital, SIMATS, Chennai. She is also working as an Associate Professor (Garden City University) teaching Anatomy for Medical and Allied course students.

Dr Lavanya Prathap, is a Professor in the Department Of Anatomy at Saveetha Medical College and Hospital, SIMATS, Chennai. She is also working as a Principal for Allied Health Sciences.

Dr Subhadradevi Velichety, is a Emeritus Professor & Head in the Department of Anatomy at S.V.Medical College, Tirupathi. She is an Author and Editor for several books and journals n the field of Anatomy.

Dr Jeyakumar S, is a Professor & Research Co Ordinator  in the School Of Health Sciences, Garden City University. He is very Passionate about Pursuing various degrees in medical field and Profound knowledge in Basic Medical Sciences.

Acknowledgements

The authors would like to thank the radiology departments of Saveetha Medical College, HOSMAT Hospitals, and GCU Physio Care for their technical support and for providing facilities for imaging. The participants are also thanked for their cooperation and participation in this study.

Recommended Citation

Nagolu S, Prathap L, Velichety S, S J, Prahalada KN. Radiographic Assessment Of Morphometric Knee Angles in Patellofemoral Pain Syndrome: A Quantitative Cross-Sectional Study. The Internet Journal of Allied Health Sciences and Practice. 2026 Jun 01;24(2), Article 13.