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[Age-related changes in lower urinary tract symptoms and urodynamic parameters in patients with benign prostatic hyperplasia treated by transurethral resection of the prostate].

PURPOSE
To characterize age-related clinical and urodynamic features of patients with benign prostatic hyperplasia (BPH) treated by transurethral resection of the prostate (TUR-P).


MATERIALS AND METHODS
Between July 1994 and March 2000, a total number of 451 patients underwent TUR-P in Nagoya Urology Hospital. Out of these 451 patients, 15 (3.3%) were diagnosed as having an incidental prostate cancer on pathological examination of resected prostate tissue. The remaining 436 patients (48-92 years, 69.8 +/- 7.4 years), in whom 196 (45.0%), 208 (47.7%) and 32 (7.3%) were < or = 69, 70-79 and > or = 80 years, respectively, were subjects for the present study. Their clinical features before and after TUR-P and the therapeutic effects of the treatment were evaluated in terms of aging.


RESULTS
Among preoperative variables evaluated, IPSS in patients aged < or = 69 years was significantly higher than in those aged 70-79 years (p < 0.05). The QOL index was significantly higher in patients aged > or = 80 years than in those aged 70-79 years (p < 0.05). The maximum bladder capacity decreased with age from 276 ml in patients aged < or = 69 years to 211 ml in those aged > or = 80 years. Postoperatively, both maximum and mean flow rates were significantly lower in patients aged 70-79 and > or = 80 years compared to those aged < or = 69 years. There was, however, no significant age-related difference in IPSS and QOL index. The assessment of treatment effects at 3 months following TUR-P revealed that the outcomes in function as evaluated by uroflowmetry, anatomy and ultrasonic measurement of prostate volume were significantly worse in patients aged > or = 80 years compared to those in younger patients. However, there was no significant age-related difference in outcomes in subjective symptoms and QOL.


CONCLUSIONS
TUR-P could be performed safely even in patients aged > or = 80 years. It is concluded that although postoperative urinary condition might be worse in older patients, they would nevertheless be satisfied with the results of TUR-P in the same way as less aged patients. As long as subjects are selected properly based on the correct diagnosis of BPH and a sufficient evaluation of operation risks, TUR-P can be expected to be performed safely and be followed by satisfaction with the treatment effects.