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* Submitted as Chief Resident, Illinois Masonic Medical Center, 3000 N Halsted, Ste 500, Chicago, IL 60657.
Submitted during first-year residency, Illinois Masonic Medical Center, Chicago, IL.
Submitted as Residency Director, Illinois Masonic Medical Center, Chicago, IL.
Abstract
Osteomyelitis secondary to diabetic foot infections can lead to proximal amputation if not diagnosed in a timely and accurate manner. The authors have found no studies to date that correlate a specific erythrocyte sedimentation rate with osteomyelitis. A retrospective chart review of 29 diabetic patients admitted to the hospital with diagnoses of osteomyelitis or cellulitis of the foot during a 1-year period was performed. Of the various lab values and demographic factors compared, erythrocyte sedimentation rate was the only measure that differed significantly between the two groups. A receiver operating characteristic curve was used to obtain the optimal cutoff value of 70 mm/h, a level above which osteomyelitis was present with the highest sensitivity (89.5%) and highest specificity (100%), along with a positive predictive value of 100% and a negative predictive value of 83%. This study shows that in combination with clinical suspicion in diabetic foot infections, the erythrocyte sedimentation rate is highly predictive of osteomyelitis, and that the value of 70 mm/h is the optimal cutoff to predict accurately the presence or absence of bone infection. (J Am Podiatr Med Assoc 91(9): 445-450, 2001)
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