Correlation of Kidney Lenght and Body Parameters in CT Scans

ABSTRACT Purpose: To analyze the renal length in patients submitted to computed tomography (CT scans) and compare it according to age, gender, laterality and body parameters like height, weight and Body Mass Index (BMI). Methods and Methods: We analyzed 74 patients (148 kidneys) submitted to CT scans and evaluated renal length in centimeters, gender, height, weight and BMI. The abdominal CT scans acquisition and image analysis was done using 16 and 64 slice multidetector computed tomography (MDCT) scanners to perform multiplanar reconstructions (MPR) and measure the kidney length (KL) in coronal plane. The statistical analysis was performed with the GraphPad Prism software (Version 9.2.0). Results: The 74 patients analyzed (28 Males/37.83% and 46 females/62.17%) presented mean age of 54.1 years-old, right kidney length between 8.4 to 13.1cm (mean=10.79) and left kidney length between 8.3 to 13.1cm (mean=10.97). The kidney length on both sides was significantly greater in male sex (p<0.001). The length of the left kidney was significantly greater than that of the right kidney (p=0.017). The linear regression analysis showed non-significant correlation between both right kidney length and positive correlations between kidney length and BMI, weight and height. Conclusions: CT scan accurately assessed renal length. We observed that renal length was greater in males and in the left side. Weight, age, height and body mass index showed a positive correlation with kidney length.