2021 ISAKOS Biennial Congress ePoster
Evaluating the Correlation Between Several Patellar Measurements and Patient’s Height and Weight - Matched Case-Control Study.
Ahmad Essa, MPH MD, Kufur Qassim ISRAEL
Dror Lindner, MD, Savyon ISRAEL
Salah Khatib, MD, Yafa an-Naseriyye ISRAEL
Gabriel Agar, Prof, Tel Aviv ISRAEL
Yiftah Beer, MD, Tel Aviv-Yafo ISRAEL
Shamir Medical Center (Assaf Harofeh), Zerifin 70300, ISRAEL
FDA Status Not Applicable
Summary
Evaluating the variation of TT-TG and IS measurements as a function of patient’s height and weight on sagittal MRI while employing case-control matching analysis for age and gender to maximize confounder control.
ePosters will be available shortly before Congress
Abstract
Objective
Tibial tubercle-trochlear groove distance (TT-TG) and Insall-Salvati ratio (IS) were recently suggested to be associated with patient’s height and weight. We aimed to investigate the variation of TT-TG and IS measurements as a function of patient’s height and weight on sagittal MRI while employing case-control matching analysis for age and gender to maximize confounder control.
Methods
A retrospective case-control population-based study was performed of all MRI studies of patients diagnosed with lateral patellar dislocation, between 2005-2020 at a regional tertiary medical center.
Using 1:1 case-control matching for categories of gender and age at the time of the diagnosis, one control subject was assigned to each case of lateral patellar dislocation. The study included 340 individuals (170 case-control matched pairs).
Measurements of tibial tubercle-trochlear groove distance and Insall-Salvati ratio were conducted using the picture archiving and communication system (PACS).
Correlation coefficients were calculated to evaluate the significance and amplitude of each measurement as a function of patient’s height and weight.
Results
Both TT-TG and IS measurement were found to be significantly higher in the patellar dislocation (PD) group compared to the control group (14.5 ± 4.45 vs 10.83 ± 4.4, p<0.001 and 1.3 ± 0.22 vs 1.1 ± 0.19, p<0.001 respectively). TT-TG and IS were not associated with patient’s height and weight (p>0.05).
Conclusion
Patient’s height and weight per se does not appear to impact both TT-TG and IS measurements, while employing case-control matching analysis for age and gender to minimize confounders effect.