Anthropometric differences in the tibial tuberosity to trochlear groove measurement in an African population

摘要

Background: The tibial tuberosity to trochlear groove (TTTG) is a well-described radiographic measurement around the knee, whichis of clinical significance in the assessment of patients with patellar instability. The TTTG is clinically relevant when considering thetype of surgical procedures that may be required. The purpose of this retrospective observational study was to measure the TTTGmeasurement in the black African population and to compare it to the quoted norms in the literature.Methods: A random sample was obtained of 100 consecutive CT scans of lower limbs for vascular pathologies from black Africanpatients. The TTTG was measured by a single observer on the Siemens? syngo.plaza software.Results: CT scans of 162 knees from 88 patients met the inclusion criteria. The median age was 34 years (range 19–85 years;interquartile range [IQR] 24–50). The majority of cases were male (75%; n=121). The mean TTTG was 20.3 mm (standard deviation[SD] 16.1; range 1–29.2 mm). The mean TTTG in males was 20.7 mm (95% confidence interval [CI] 19.9–21.5 mm) and 19.1 mm (95%CI 17.6–20.5 mm) in females (p=0.06). There was no correlation found between age and TTTG (p=0.12).Conclusion: According to our study, barring some limitations, it appears that there may be a noteworthy difference in the TTTGmeasurement in the black African population. Larger comparative studies would be required to confirm these findings and to determinethe clinical relevance.