Alexandru Ciudin1, Rafael Salvador2, Alex Budoy2, Andreea Ciudin3, Cristina Spinu4, Mihai Gabriel Diaconu5, Vlad Constantin6, Javier Sánchez7, Carlos Nicolau2, Antonio Alcaraz5. 1. Urology Department, Hospital Clínic Barcelona, Spain; Urology Department, Fundación Sanitaria Hospital de Mollet, Barcelona, Spain. Electronic address: alexciudin@yahoo.com. 2. Radiology Department, Hospital Clínic Barcelona, Spain. 3. Endocrinology Department, Hospital Vall d'Hebron Barcelona, Spain. 4. Radiology Department, Hospital Parc Tauli Sabadell, Spain. 5. Urology Department, Hospital Clínic Barcelona, Spain. 6. Surgery and Urology Department, Hospital "Sf Pantelimon" Bucharest, Romania. 7. Urology Department, Hospital Clínic Barcelona, Spain; Urology Department, Fundación Sanitaria Hospital de Mollet, Barcelona, Spain.
Abstract
INTRODUCTION: To validate the use of supine position and CT images for assessing abdominal circumference (AC). METHOD: A prospective study in consecutive patients undergoing scheduled abdominal CT at our center between 17 and 25 September 2012. AC was measured four times: Measurements 1 and 2 were sequentially done by the same trained nurse before abdominal CT just above the iliac crest, while measurements 3 and 4 were done on the last abdominal CT slice not showing the iliac bone. Student's t tests and Q-Q and Bland-Altman plots were used for statistical analysis. RESULTS: A total of 102 patients were recruited. Mean age, 60 (35-78) years. Mean BMI, 25 (18-39) kg/m(2). Mean AC, 93.2 (73-135) cm. No significant differences were found between the four ACs measured (Student's t test, P=0.83). Q-Q and Bland-Altman plots showed good overlapping for the low and central values (73-110 cm) with a greater scatter for extremely high values. For the ellipse estimation, R(2) was 0.987 with a mean error of 0.4 cm and a stretch dispersion between 1.1 and -0.3 cm. CONCLUSION: Supine (either measured or estimated on CT images by free hand elliptical ROI or ellipse formula) and standing measurements appear to be equivalent for abdominal circumferences <110 cm.
INTRODUCTION: To validate the use of supine position and CT images for assessing abdominal circumference (AC). METHOD: A prospective study in consecutive patients undergoing scheduled abdominal CT at our center between 17 and 25 September 2012. AC was measured four times: Measurements 1 and 2 were sequentially done by the same trained nurse before abdominal CT just above the iliac crest, while measurements 3 and 4 were done on the last abdominal CT slice not showing the iliac bone. Student's t tests and Q-Q and Bland-Altman plots were used for statistical analysis. RESULTS: A total of 102 patients were recruited. Mean age, 60 (35-78) years. Mean BMI, 25 (18-39) kg/m(2). Mean AC, 93.2 (73-135) cm. No significant differences were found between the four ACs measured (Student's t test, P=0.83). Q-Q and Bland-Altman plots showed good overlapping for the low and central values (73-110 cm) with a greater scatter for extremely high values. For the ellipse estimation, R(2) was 0.987 with a mean error of 0.4 cm and a stretch dispersion between 1.1 and -0.3 cm. CONCLUSION: Supine (either measured or estimated on CT images by free hand elliptical ROI or ellipse formula) and standing measurements appear to be equivalent for abdominal circumferences <110 cm.
Authors: Emma H Allott; Lauren E Howard; Hai-Jun Song; Katharine N Sourbeer; Bridget F Koontz; Joseph K Salama; Stephen J Freedland Journal: Cancer Epidemiol Biomarkers Prev Date: 2014-08-21 Impact factor: 4.254
Authors: Laura A Bertrand; Lewis J Thomas; Peng Li; Claire M Buchta; Shannon K Boi; Rachael M Orlandella; James A Brown; Kenneth G Nepple; Lyse A Norian Journal: Urol Oncol Date: 2017-08-07 Impact factor: 3.498