Fig. 4

Mediation models (SF-12 v2 PCS). The change of mental health did not mediated the change of lower urinary tract symptoms severity and the change of health-related quality of life as measured by as measured by the physical component summary of Short-Form 12 Health Survey version 2 (SF-12 v2). *P < 0.05 β: the regression parameter estimate. The models were adjusted for socio-demographic factors