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Published on: June 23, 2015
Predictors of kidney dimensions measured by multi-detector computed tomography (MDCT) in 930 middle-aged and elderly
Orhan Ozbek1, Yalcin Solak, Ibrahim Guler
1Department of Radiology, Meram School of Medicine, Selcuk University, Meram, Konya, Turkey. orhan.ozbek@gmail.com
Purpose:
A few studies investigated renal size using computed tomography (CT) in middle-aged and elderly patients while taking renal function into account. Thus, we aimed to assess kidney dimensions and their predictors in patients without known renal disease by multi-detector computed tomography (MDCT).
Methods:
This is a 6-month-long prospective observational study. Estimated glomerular filtration rate (eGFR) was calculated with Cockcroft-Gault (CG) and modification of diet in renal disease (MDRD) formulas. Pole-to-pole kidney length (R1) was determined from coronal and sagittal oblique images. Kidney length (R2), width (R3), and parenchymal thickness were measured in axial slices.
Results:
The data of the 930 patients were included in this study. CG-eGFR was more closely correlated with R1, R2, and R3 than MDRD-eGFR. CG-eGFR, female gender, and presence of diabetes mellitus were independent predictors of R1 size in logistic regression analyses.
Conclusion:
Kidney sizes diminish with advancing age. CG-eGFR shows a better correlation with kidney dimensions compared with MDRD. Overall, age was a stronger determinant of eGFR than renal dimensions.
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