Aims: Presently, there is no simple, universally accepted instrument for the initial diagnosis of urinary incontinence (UI), which why physicians find it so difficult to integrate the diagnosis into their daily clinical practice. The objective of this study is to the true value of the ICIQ-UI SF questionnaire (ICIQ), the stress test, and the combination of both for the diagnosis as to the type UI. Methods: Cross-sectional study performed in 116 women consulting for UI symptoms in two specialized health care centers. subjects completed the ICIQ and underwent a stress test and urodynamic testing which was used for the reference Sensitivity, specificity, positive and negative predictive values, and the statistical "likelihood ratio (LR)" were Results: According to the ICIQ, 45 women (38.8%) suffered from Stress UI (SUI); 19 (16.4%), Urgency UI (UUI), and 49 Mixed UI (MUI). According to the stress test, 75 (64.7%) presented SUI. According to the combination of both tests, the diagnosis SUI in 35 (30.2%), UUI in 17 (14.7%), and MUI in 37 (31.9%). Regarding urodynamic testing, observations were as follows: USI in subjects (38.8%), detrusor overactivity (DO) in 25 (21.6%), and combination of both (MUI) in 30 (25.9%). The combination of ICIO-UI plus stress test showed good specificity and negative predictive value, and the best LR coefficients obtained were: 3.11 (USI); (UUI); 2.64 (MUI), and 3.77 ("all" SUI). Conclusions: The combined use of the ICIQ plus stress test will aid in characterizing the of UI at a basic health care level, favoring the prescription of the most appropriate treatment for each case.