Osteoporosis in a postpolio clinic population.
OBJECTIVE
To determine (1) the frequency of osteoporosis at the hip and lumbar spine in a postpolio clinic population and (2) the association of lower-extremity muscle strength and other potential contributing factors to osteoporosis with bone density measured at the hip.


METHODS
Cross-sectional study involving a chart review.


METHODS
A university-affiliated hospital postpolio clinic.


METHODS
Patient charts (N=379) were reviewed; 164 (26%) were included, and 215 (74%) were not included primarily (74%) because of the unavailability of bone density results.


METHODS
Not applicable.


METHODS
Bone density (in g/cm(2)) and T score were assessed at the femoral neck and lumbar spine. Muscle strength was evaluated by manual muscle testing in 7 bilateral lower-extremity muscles.


RESULTS
The occurrence of osteoporosis at the hip and lumbar spine was 20 (32%) of 62 and 6 (10%) of 61 in men, 3 (9%) of 33 and 2 (6%) of 32 in premenopausal women, and 18 (27%) of 67 and 7 (11%) of 65 in postmenopausal women, respectively. In a logistic regression model, the presence of osteoporosis at the hip was significantly associated with strength sum score in the same extremity in which the bone density was performed after adjusting for other important risk factors (age, body mass index, time since polio).


CONCLUSIONS
Osteoporosis occurred commonly at the hip in a postpolio clinic population. Hip bone density was associated with muscle strength in the same lower extremity.
Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, McGill University Health Centre, McGill University, Montreal, QC, Canada.
Muriel
M
Haziza
Richard
R
Kremer
Andrea
A
Benedetti
Daria A
DA
Trojan
D015502:Absorptiometry, Photon; D000328:Adult; D017677:Age Distribution; D015992:Body Mass Index; D015519:Bone Density; D003430:Cross-Sectional Studies; D005080:Exercise Test; D005260:Female; D005272:Femur Neck / Q000000981:diagnostic imaging; D006785:Hospitals, University / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D007866:Leg / Q000503:physiopathology; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000503:physiopathology; D016017:Odds Ratio; D015207:Osteoarthritis, Hip / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D011051:Poliomyelitis / Q000150:complications*; D012189:Retrospective Studies; D017678:Sex Distribution; D013128:Spinal Osteophytosis / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D014481:United States / Q000453:epidemiology