<qa>  What is the HIP PRO study?The HIP PRO Study is a randomized, controlled trial of the efficacy of a trochanteric padding system in the reduction of hip fractures in nursing home residents over the age of 65 in up to 45 nursing homes in three regions: Boston, MA, St. Louis, MO, and Baltimore, MD. Eligible residents of these facilities will be screened and then evaluated during a two week run-in period during which a hip protection compliance rate of at least 67 will be required for enrollment. Recruitment of all eligible residents entering each nursing home will continue throughout the 3.5 year follow-up period. 