RESUMO
OBJECTIVE: To evaluate the association between serum levels of 25-hydroxyvitamin D (25[OH]D(3)) and functional recovery after hip fracture. DESIGN: Cross-sectional study. SETTING: Rehabilitation hospital in Italy. PARTICIPANTS: A total of 350 white hip-fracture patients consecutively admitted to a rehabilitation hospital. Thirty-five patients were excluded because their hip fracture was caused by major trauma or cancer affecting the bone or they could not complete rehabilitation. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Patients underwent 25(OH)D(3) assessment at a mean +/- standard deviation of 21.3+/-8.1 days after the hip fracture. Functional recovery was evaluated by using Barthel Index scores. RESULTS: Low levels of 25(OH)D(3) were found (median, 6.9 ng/mL). By using the Spearman rank correlation test, a significant positive correlation was observed between serum 25(OH)D(3) and Barthel Index score assessed on admission (rho=.218, P <.001) and discharge (rho=.198, P <.001), but not with the change in Barthel Index score attributable to rehabilitation. Linear multiple regression showed that the association between 25(OH)D(3) and Barthel Index score was independent of 11 confounding variables: age, sex, hip-fracture type, pressure ulcers, cognitive impairment, neurologic impairment, infections, time between fracture occurrence and 25(OH)D(3) evaluation, comorbidity, surgical procedure type, and previous hip fractures. CONCLUSIONS: In the study population, serum 25(OH)D(3) was an independent predictor of functional recovery assessed by Barthel Index score after hip fracture but not of the change in the functional score resulting from rehabilitation.
Assuntos
Fraturas do Quadril/sangue , Recuperação de Função Fisiológica , Vitamina D/análogos & derivados , Vitamina D/sangue , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Avaliação da Deficiência , Feminino , Fraturas do Quadril/reabilitação , Humanos , Masculino , Admissão do Paciente , Alta do Paciente , Valor Preditivo dos Testes , PrognósticoRESUMO
BACKGROUND: Protein depletion is detrimental in bone health, but the association between bone mineral density (BMD) and serum albumin is controversial. We recently showed a positive association between femur BMD and total lymphocyte count (TLC), a validated marker of protein nutrition status, in hip-fractured women. OBJECTIVE: To investigate the association between femur BMD and both serum albumin and TLC in hip-fractured men and women. METHODS: 286 of 315 hip-fractured patients (243 women and 43 men) consecutively admitted to a rehabilitation hospital were studied. BMD was measured by DXA in the unfractured femur. The correlation between BMD and both TLC and serum albumin was studied by Pearson's coefficient and Bonferroni adjustment. RESULTS: In women a positive correlation was observed between, TLC but not albumin, and BMD measured in the total femur (r = 0.26; p < 0.01), femur neck (r = 0.21, p < 0.01), trochanter (r = 0.22, p < 0.01), intertrochanteric area (r = 0.25, p < 0.01) and Ward's triangle (r = 0.17, p < 0.05). Conversely in men a positive correlation was found between albumin, but not TLC, and BMD measured in the total femur (r = 0.50, p < 0.01), femur neck (r = 0.52, p < 0.01), intertrochanteric area (r = 0.52, p < 0.01) and Ward's triangle (r = 0.49, p < 0.01). Linear multiple regression showed that the associations were independent of age, weight, height, body mass index, erythrocyte sedimentation rate, time between surgery and blood sample collection and type of hip fracture. CONCLUSION: Our results support the role of protein nutrition in bone health, at least in elderly frail patients. TLC and serum albumin were suitable markers, however sex-related differences in their usefulness were observed.
Assuntos
Idoso/fisiologia , Biomarcadores , Densidade Óssea/fisiologia , Contagem de Linfócitos , Estado Nutricional/fisiologia , Albumina Sérica/análise , Idoso de 80 Anos ou mais , Feminino , Fraturas do Quadril , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
BACKGROUND: Protein depletion appears to play a detrimental role in the causes of hip fracture and low bone mineral density has been observed in protein-depleted subjects. OBJECTIVE: To investigate the association between femur bone mineral density and total lymphocyte count, a marker of the protein nutrition status, in elderly hip-fractured women. METHODS: 210 white women affected by their first hip fracture either spontaneous or due to minimal trauma consecutively admitted to a rehabilitation hospital were studied. 34 women were ruled out because of confounding factors altering their lymphocyte count. Both total lymphocyte count and bone mineral density at the unfractured femur were evaluated. The correlation between these two variables was studied by Pearson's coefficient. Bonferroni adjustment was used for multiple comparisons. Bone density was measured by DXA (Hologic QDR 4500W). RESULTS: A positive correlation was observed between lymphocyte count and bone mineral density measured at both total proximal femur (r = 0.21; p < 0.05) and intertrochanteric area (r = 0.21; p < 0.05). Stepwise linear multiple regression analysis showed that the association with total lymphocyte count was independent of age, weight, height, body mass index, time between surgery and blood sample collection for lymphocyte count and type of hip fracture (cervical or trochanteric) when bone mineral density was evaluated both at total proximal femur (p < 0.05) and intertrochanteric area (p < 0.05). CONCLUSION: Our results support the role exerted by protein nutrition in bone health, at least in elderly frail women. From this point of view, a total lymphocyte count is a suitable, inexpensive marker.