1. Roberts KC, Brox WT, Jevsevar DS, Sevarino K. Management of hip fractures in the elderly. J Am Acad Orthop Surg 2015;23:131-7.
6. Miyamoto RG, Kaplan KM, Levine BR, Egol KA, Zuckerman JD. Surgical management of hip fractures: an evidence-based review of the literature. I: femoral neck fractures. J Am Acad Orthop Surg 2008;16:596-607.
7. Murphy NM, Carroll P. The effect of physical activity and its interaction with nutrition on bone health. Proc Nutr Soc 2003;62:829-38.
8. Kim CS, Maekawa Y, Fujita M, Sato N, Nishimuta M, Ishizaki Y, et al. Immobilization on the day 14th does not disrupts the basic diurnal rhythm of bone resorption. J Gravit Physiol 2000;7:P125-6.
9. Ariza-Vega P, Kristensen MT, Martin-Martin L, Jimenez-Moleon JJ. Predictors of long-term mortality in older people with hip fracture. Arch Phys Med Rehabil 2015;96:1215-21.
11. Hoyt BW, Pavey GJ, Pasquina PF, Potter BK. Rehabilitation of lower extremity trauma: a review of principles and military perspective on future directions. Curr Trauma Rep 2015;1:50-60.
12. Vasarhelyi A, Baumert T, Fritsch C, Hopfenmuller W, Gradl G, Mittlmeier T. Partial weight bearing after surgery for fractures of the lower extremity: is it achievable? Gait Posture 2006;23:99-105.
13. Damm P, Schwachmeyer V, Dymke J, Bender A, Bergmann G. In vivo hip joint loads during three methods of walking with forearm crutches. Clin Biomech (Bristol, Avon) 2013;28:530-5.
14. Kubiak EN, Beebe MJ, North K, Hitchcock R, Potter MQ. Early weight bearing after lower extremity fractures in adults. J Am Acad Orthop Surg 2013;21:727-38.
17. Court-Brown CM, Heckman JD, McQueen MM, Ricci WM, Tornetta P, McKee MD. Rockwood and Green’s fractures in adults. 8th ed. Philadelphia, PA: Wolters Kluwer Health; 2014.
18. Elliott DS, Newman KJ, Forward DP, Hahn DM, Ollivere B, Kojima K, et al. A unified theory of bone healing and nonunion: BHN theory. Bone Joint J 2016;98B:884-91.
19. Kammerlander C, Pfeufer D, Lisitano LA, Mehaffey S, Bocker W, Neuerburg C. Inability of older adult patients with hip fracture to maintain postoperative weight-bearing restrictions. J Bone Joint Surg Am 2018;100:936-41.
20. American Academy of Orthopaedic Surgeons. Appropriate use criteria for postoperative rehabilitation of low energy hip fractures in the elderly. Rosemont, IL: American Academy of Orthopaedic Surgeons; 2015.
22. Hurkmans HL, Bussmann JB, Selles RW, Benda E, Stam HJ, Verhaar JA. The difference between actual and prescribed weight bearing of total hip patients with a trochanteric osteotomy: long-term vertical force measurements inside and outside the hospital. Arch Phys Med Rehabil 2007;88:200-6.
24. Austin PC, Steyerberg EW. The number of subjects per variable required in linear regression analyses. J Clin Epidemiol 2015;68:627-36.
25. Choi SH, Na DL, Lee BH, Hahm DS, Jeong JH, Yoon SJ, et al. Estimating the validity of the Korean version of expanded clinical dementia rating (CDR) scale. J Korean Neurol Assoc 2001;19:585-91.