“…Among the published trials, 116 trials (52%) used PROs. PROs were primary end points in 45 trials 20,26,28,30,[34][35][36][37]42,48,53,[56][57][58][61][62][63]66,70,74,75,77,79,83,85,93,94,97,103,[108][109][110]113,115,117,118,124,125,127,128,130,133,134,137 (20% of all published trials; 31% of 145 trials clearly stating their primary end point; 39% of 116 trials including a PRO) and secondary end points in 71 trials 24,25,27,29,[31][32][33]…”