Reliability and validity of the national institute of health chronic prostatitis symptom index quastionnaire in Turkish Population.

To develop the first Turkish version of the National Institute of Health Chronic Prostatitis Symptom Index Questionnaire?(NIH-CPSI) and to investigate its validity and reliability in men with chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) and healthy controls.

A total of 204 patients, 116 CP/CPPS and control group, which 88 healthy individuals join, were included in this prospective study. The NIH-CPSI form was first translated into Turkish and later on back to English. By using the Turkish version of the NIH CPSI, 40 patients completed the same questionnaires twice at 2-weeks intervals for test-retest concordance. To evaluate internal consistency and test-retest reliability, cronbach alpha value, the Spearman correlation test were utilized respectively.

Our findings demonstrated statistically significant differences in NIH-CPSI scores between the patients and control groups cases (p<0.001). Cronbach?s alpha coefficient value of NIH-CPSI was 0,864. Reliability of test-retest was 0.909 (p<0.001). Additionally, Spearman correlation test has shown that the results obtained by Turkish NIH-CPSI were significantly correlated.

The first Turkish version of the NIH-CPSI was found to be a reliable and valid instrument for Turkish patients with chronic prostatitis in the clinical and research settings.

Turkish journal of medical sciences. 2020 Sep 15 [Epub ahead of print]

Alper CoŞkun, Utku Can, Fatİh Tarhan, ÖvÜnÇ KavukoĞlu, Kamİl Fehmİ Narter