Changing comorbidity classification patterns at radical prostatectomy during a 10-year period.

Objective: To investigate the consistency of several comorbidity classifications and concomitant diseases at radical prostatectomy (RP) during a 10-year period.

Methods And Materials: In 1,297 patients who underwent RP between 1993 and 2002, age and several comorbidity classifications were derived from patient records and assigned to the year of surgery. Trends were evaluated using the Cochran-Armitage trend test.