Living in a sunny climate does not improve vitamin D levels in hip fracture patients, according to a new study presented today at the 2013 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS). The authors also report that vitamin D levels are lower in hip fracture patients when compared with hip and knee replacement patients.
Researchers reviewed vitamin D levels of 1,539 patients, including 448 hip fracture patients, and 1,091 total hip or total knee replacement patients, from December 2010 to December 2011 at a medical center in southern California.
Mean vitamin D levels for the hip fracture and total hip and knee replacement patients were 26 ng/ml and 30 ng/ml respectively. Sixty-six percent of patients in the hip fracture group were deficient or insufficient compared to 54% in the total hip and knee replacement group. Hip fracture participants aged 71 years or older were more deficient than the joint replacement group (66% vs 47%).
The researchers report that overall, a majority of male and female participants aged 18 years and older with hip fractures had insufficient vitamin D levels, and those 71 years or older had significantly lower levels that the hip and knee replacement group.