Initially covering four clinical procedures, PROMs calculate the health gain after surgical treatment using pre and post operative surveys. This publication sets out key statistics on patients' self-reported health status before undergoing four common elective surgical procedures:

• groin hernias
• hip replacements
• knee replacements, and
• varicose veins.

It includes analysis of questionnaires that all hospitals treating NHS patients have been asked to collect from patients who wish to participate.