- BI: Barthel index inflection point (0–55/60–100); KI: Katz index inflection point (A-B/C-G); LBI: Lawton-Brody index inflection point (0–3/4–8). R: residence; F: type of fracture; P: surgical procedure; S: side of fracture; Fem: female. A positive check indicates p-value <0.05 on Log-Rank test for each category