1.1 ,This guide is intended as a resource for individuals and organizations when designing clinical trials and/or clinical registries and addresses the selection of patient-reported outcomes, safety outcomes, imaging outcomes, and other topics related to hip reconstructive surgery (HRS) including: (1) hip replacement systems, (2) hip fracture surgery, (3) acetabular fracture surgery, (4) hip arthroscopy and/or labrum repairs, and (5) peri-acetabular osteotomies, or other hip surgeries.