Correlation Analyses of Computed Tomography and Magnetic Resonance Imaging for Calculation of Prostate Volume in Colorectal Cancer Patients with Voiding Problems Who Cannot Have Transrectal Ultrasonography

Table 1

Baseline demographics.

Parameter	N(%) or median (range)
Age (years)	70.5 (40.0-90.0)
Benign prostatic hyperplasia, n (%)	20 (16.4)
Hypertension, n (%)	48 (39.3)
Diabetes, n (%)	28 (23.0)
Cerebrovascular disease, n(%)	10 (8.2)
Cardiovascular disease, n(%)	4 (3.3)
Others, n (%)+	21 (12.2)
Preoperative IPSS score, total/QoL^++	13.5 (0-35)/ 1 (1-6)
ASA score, 1/2/3	2/101/3 (1.9/95.3/2.8)
Preoperative voiding problem	8 (6.6)
Type of colorectal surgery
Low anterior resection	68(55.7)
Hatmann (Proctosigmoidectomy)	2(1.6)
Miles operation (Abdominoperineal resection)	5(4.1)
Anterior resection of rectum	15(12.3)
Transanal total mesorectal excision	3 (2.5)
Subtotal- or hemi-colectomy	15 (12.3)
Others	14 (11.5)
Postoperative IPSS
Symptom Score	19 (10-35)
Quality of Life score	7 (3-7)
Postoperative uroflowmetry
Maximal flow rate (ml/hr)	49 (9.1-49.1)
Residual urine (cc)	158.5 (0-600)
Time interval between CT/MRI and TRUS (days)	25.0 (12-30)
TRUS-TPV (cc)	25.0 (7.0-191.0)
Pre-CT volume, 1st / 2nd person	43.4 (10.2-131.5) / 42.4 (11.0-123.1)
Post CT volume, 1st / 2nd person	40.6 (30.3-55.0) / 37.3 (31.4-53.6)
Pre-MRI volume, 1st / 2nd person	29.7 (15.1-108.7) / 33.6 (15.8-101.9)
Post MRI volume, 1st / 2nd person	33.0 (11.7-67.1) / 33.1 (15.2-75.1)

+, Others included hepatitis, hyperlipidemia, chronic pulmonary obstructive disease, and asthma;++, only 8 patients completed preoperative IPSS questionnaires; , only 72 and 77 patients completed postoperative IPSS questionnaires and uroflowmetry, respectively; PSA, prostate specific antigen; IPSS, International Prostatic Symptom Score questionnaire; ASA, American Society of Anesthesiologists score; TRUS, transrectal ultrasonography of prostate; CT, computed tomography; MRI, magnetic resonance imaging