Abstract

Purpose
Analyzed the correlation between the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) and International Index of Erectile Function (IIEF-5) from questionnaires among Korean 40-50s male.
Materials and Methods: From September 1, 2011 to December 31 2012, we conducted a survey targeting 1032 Korean males who were had medical examinations in National Police Hospital, Using NIH-CPSI and IIEF-5. After explaining the content of the NIH-CPSI and IIEF-5, the paper was checked by volunteers in person, and the results were then collected. The subjects were limited to Korean males in their 40-50s. We analyzed the collected questionnaires.
Results: The average age of 1032 volunteers was 50 years old (42-59), and the average of NIH-CPSI total scores was 7.1±5.5. The average of IIEF-5 total scores was 17.4±6.5. IIEF-5 category was divided into Normal 385 (37.3%), Mild 296 (38.7%), Mild-Moderate 215 (20.8%), Moderate 98 (9.5%), and Severe 38 persons (3.7%). Among total volunteers, 72 persons were Chronic prostatitis like symptom patients (6.9%), and whose NIH-CPSI average of pain score (total 21), voiding score (total 10), quality of life score (total 12) and total scores were 7.6±3.1, 4.3±2.5, 5.8±2.3, and 17.8±6.7, respectively. There were moderate correlations of pain score, voiding score, quality of life score, but not significant (Pearson's coefficient of correlations <0.501). An average of total IIEF-5 scores in chronic prostatitis - like symptoms in the present group was 14.0±6.8. It was significantly lower than in the in the absent group. Prostatitis-like symptoms in the present group had more severe degrees of erectile dysfunction than absent group (p=0.002). Assessing each NIH-CPSI category score and total score affected to total IIEF-5 score, we analyzed the correlation between NIH-CPSI and IIEF-5 using regression analysis. There were all negative correlations between IIEF-5 and Pain score(t=-6.199, r2=0.036, p=0.000), voiding score (t=-0.157, r2=0.025, p=0.000), QOL score (t=-7.845, r2=0.056,p=0.000), and total score (t=-9.366, r2=0.078, p=0.000). Having analyzed correlations between each score of NIH-CPSI groups and IIEF-5 score by using multiple regression analysis, there were statistically significant difference negative correlations between pain score and IIEF-5 (t=-2.646, p=0.008), QOLscore (t=-4.219, p=0.000), and age (t=-3.135, p=0.002), but not to voiding score (t=0.628, p=0.530).
Conclusions: The higher the NIH-CPSI score, especially for pain and QOL scores play a larger role, and adversely affects erectile function of chronic prostatitis like symptom patients in Korean males aged 40-50s. (Korean J UTII 2012;7:164-171)

• Keywords: Prostatitis, Erectile dysfunction, Questionnaires