“…The authors located one randomized controlled trial (RCT), one repeated measures study, three methodological studies, three qualitative studies (i.e., semi structured interviews and focus groups), and 17 cross-sectional studies. Seven studies reported using online questionnaires [7,8,9,10,11,12,13], 14 used a field survey or postal delivered questionnaire [2,3,14,15,16,17,18,19,20,21,22,23,24,25], and one study combined both a field survey and online questionnaire to collect information [26]. Three studies used uroflowmetry and sonography to measure multiple uroflowmetric parameters (e.g., maximum flow rate, Qmax and average flow rate, and Qave) and used postvoid residual (PVR) urine volume as one of the outcomes [14,15,21]; see Table S2 for an overview of the studies reviewed.…”