Cultural Adaptation Into Spanish (Spain) of the Questionnaire "Overactive Bladder - Family Impact Measure (Oab-Fim)".

o The cultural adaptation included a two-step process including conceptual and linguistic validation through forward and back translations in duplicate, reviewed by a panel of experts and a debriefing with relatives of OAB patients (Figure 1). In a second phase (Figure 2), we carried out measurement of psychometric properties in OAB patients and their relatives on habitual coexistence, of both genders, ≥18 years of age, newly diagnosed or on-therapy for their symptoms of OAB (OAB-V8 >8 points). Conceptual and linguistic equivalences, internal consistency (α-Cronbach), content validity (the inter-rater Rovinelli-Hambleton index of item congruence) and construct validity were explored. Construct validity included concurrent validity (with scales ZARIT (caregiver burden), OABq-SF (patient́ s specific quality-of-life and symptoms severity), PPBC (patient́ s perception of bladder condition) and FM-PBC (family membeŕ s perception of patient bladder condition), and validity of known groups according to caregiver burden (ZARIT scale) and FM-PBC scale. Feasibility and burden of administration were also measured.