Normative Values for Femoral Length, Tibial Length, and the Femorotibial Ratio in Adults Using Standing Full-Length Radiography

Knowledge of the normal length and skeletal proportions lower limb is required as part evaluation discrepancy. When measuring length, modern standing full-length digital radiographs confer a level clinical accuracy interchangeable with that CT imaging. This study reports set normative values for using 753 patients (61% male). Lower femoral tibial femorotibial ratio were measured in 1077 limbs. The reliability measurement method was tested intra-class correlation (ICC) agreement between three observers. mean limbs 89.0 cm (range 70.2 to 103.9 cm). Mean 50.0 (39.3 58.4 cm) 39.0 (30.8 46.5 median side-to-side difference 0.4 (0.2 0.7, max 1.8 324 paired population 1.28:1 1.16 1.39). A moderately strong inverse linear relationship (r = −0.35, p < 0.001, Pearson’s) identified corresponding ratio. PACS-based used this displayed excellent inter-observer (ICC 0.99). presents range adults first identify