objectives: the aim of this study was to evaluate the importance of a) urethral and/or vaginal infections caused by common germs or mycoplasmas, chlamydia, candida; b) age of patients; c) pelvic floor disorders in the development of irritative urinary symptoms in women. methods: 77 consecutive abacteriuric symptomatic female patients were compared with 55 asymptomatic women. a detailed micturition history and a genitourinary physical examination were performed. urine samples as well as vaginal and urethral swabs were taken for cultures. results: no statistical difference was found between the two groups regarding both urethral and/or vaginal infections and pelvic floor disorders. whereas a significant statistical difference was found in the age of the patients. in the symptomatic group the women were older than in the asymptomatic group. conclusions: the results of this study confirm that ageing is a very important cause in the development of the lower urinary tract symptoms in women.