Periprosthetic femoral Fx (PPFF): metanalysis of 36 studies found PPFF risk factors: Uncemented stems (OR 3.36), major teaching hosp (2.0), female (1.6), obesity (1.4), Hi comorbidity(1.4), RA (1.89), (1.67), revised THR (2.6). OA = protective (0.51) https://t.co/y2BpH8LUb6 https://t.co/EjX6R9QTK3