Abstract
Objectives
Hip fractures are associated with a high rate of morbidity and mortality, and successful ambulation after surgery is an important outcome in this patient population. This study aims to determine whether 25-hydroxyvitamin D (25(OH)D) or the Geriatric Nutritional Risk Index (GNRI) is associated with short term mortality or ability to walk after hip fracture surgery.
Methods
Patients undergoing hip fracture repair were included in this study. Mortality and walking ability were assessed at 30 and 60 days after hip fracture surgery. Pre-operative serum albumin and 25(OH)D were measured. Patients were characterized with 25(OH)D <12 ng/mL, 12 to <20, 20 to <30 or ≥30. GNRI was calculated from albumin and body weight and patients were categorized into major/moderate nutritional risk (<92), low risk (92 to <98) or in good nutritional status (≥98).
Results
Of the 290 patients (82 ± 7 years, BMI 25 ± 5 kg/m2), 73% were females. Compared to patients with vitamin D deficiency (<12 ng/mL), those with vitamin D levels in higher categories had increased ability to walk at 30 days (P = 0.031): 12 to <20 ng/ml (adjusted odds ratio = 2.61; 95% confidence interval = 1.13–5.99); 20 to <30 ng/ml (3.48; 1.53–7.95); ≥30 ng/ml (2.84; 1.12–7.20). In addition, patients also had increased mobility at 60 days in these same higher vitamin D categories 12 to <20 (2.67; 1.14–6.25); 20 to <30 (3.42; 1.46–8.00); ≥30 ng/ml (3.67; 1.37–9.82) compared to the reference group (<12 ng/mL; P = 0.028). There was no association of vitamin D with mortality at either time point. GNRI was not associated with mortality or walking ability.
Conclusions
In patients with hip fracture, vitamin D deficiency (<12 ng/mL) was associated with reduced ambulation after surgery, whereas GNRI was not associated with any outcomes. Mechanisms that attenuate mobility due to vitamin D deficiency should be examined in future studies.
Funding Sources
ONE Nutrition Grant to SAS and JLC.
Vitamin D Deficiency Is Highly Concomitant but Not Strong Risk Factor for Mortality in Patients Aged 50 Year and Older with Hip Fracture
