Prevalence of osteoporosis in patients awaiting total hip arthroplasty.
OBJECTIVE
To evaluate the prevalence of osteoporosis in patients awaiting total hip arthroplasty.


METHODS
Twenty-nine patients diagnosed with hip osteoarthritis awaiting primary total arthroplasty of the hip answered WOMAC questionnaire, VAS and questions about habits, osteoporosis and related diseases. Bone mineral densitometry of the lumbar spine and hips and laboratory tests (complete blood count and examination of calcium metabolism) were performed. Weight and height were measured to calculate body mass index (BMI). The evaluated quantitative characteristics were compared between patients with and without osteoporosis using the Mann-Whitney tests.


RESULTS
Thirteen men and 16 women with a mean age of 61.5 years old, WOMAC 51.4; EVA 6.4 and BMI 27.6 were evaluated. The prevalence of osteoporosis was 20.7%, and 37.9% had osteopenia. Patients with osteoporosis were older than patients without osteoporosis (p=0.006). The mean bone mineral density of the femoral neck without hip osteoarthritis was lower than the affected side (p=0.007). Thirty-five percent of patients did not know what osteoporosis is. Of these, 30% had osteopenia or osteoporosis.


CONCLUSIONS
osteoarthritis and osteoporosis may coexist and the population waiting for total hip arthroplasty should be considered at risk for the presence of osteoporosis. Level of Evidence III, Observational Study.
Universidade de São Paulo, Faculdade de Medicina, Hospital das Clinicas, São Paulo, Brazil, Instituto de Ortopedia e Traumatologia do Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil.
Vitor Rodrigues
VR
Domingues
Universidade de São Paulo, Faculdade de Medicina, Hospital das Clinicas, São Paulo, Brazil, Instituto de Ortopedia e Traumatologia do Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil.
Gustavo Constantino
GC
de Campos
Universidade de São Paulo, Faculdade de Medicina, Hospital das Clinicas, São Paulo, Brazil, Instituto de Ortopedia e Traumatologia do Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil.
Pérola Grimberg
PG
Plapler
Universidade de São Paulo, Faculdade de Medicina, Hospital das Clinicas, São Paulo, Brazil, Instituto de Ortopedia e Traumatologia do Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, Brazil.
Márcia Uchôa
MU
de Rezende
Arthroplasty, replacement, hip; Bone density; Osteoarthritis; Osteoporosis