The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture:

"After surgical treatment, participants with vitamin D deficiency (25OHD \< 30 ng/mL) will be randomly allocated to an intervention group or control group.~For the intervention group, participants will receive 16. 000 U oral Calcifediol daily for 5 days.~For the control group, participants will receive 16.000 U oral Calcifediol weekly for 5 weeks.~Both groups:~1. Will follow the usual hip fracture rehabilitation pathway.~2. 25OHD serum levels will be measured after 4 weeks. Depending on the serum 25OHD level, the patients will receive different vitamin D strategies (according to the protocol) Patients will be monitored for up to 12 months after the discharge from the hospital, with 3 clinic visits at 3, 6 and 12 months (to determine serum vitamin D levels and to evaluate functional status)"