RT Journal
A1 Schinsky, Mark F.
A1 Della Valle, Craig J.
A1 Sporer, Scott M.
A1 Paprosky, Wayne G.
T1 Perioperative Testing for Joint Infection in Patients Undergoing Revision Total Hip Arthroplasty
JF The Journal of Bone & Joint Surgery
JO The Journal of Bone & Joint Surgery
YR 2010
FD May 1
VO 92
IS 5
SP 1314
OP 1316
DO 
UL http://dx.doi.org/
AB 
We appreciate the insight shared on our recent article, "Perioperative Testing for Joint Infection in Patients Undergoing Revision Total Hip Arthroplasty." We regret any confusion related to the set of statistical parameters that we presented in Tables IV and V (i.e., sensitivity, specificity, positive predictive value, negative predictive value, and accuracy). In Table IV, the parameters of concern corresponded to the dichotomy of synovial fluid white blood-cell counts at a cut-point of >4200, the value that maximized the magnitudes of statistical parameters when cross-classified erythrocyte sedimentation rate and C-reactive protein information was ignored. Similarly, in Table V, the parameters of concern corresponded to dichotomies of synovial fluid white blood-cell counts at cut-points of >3000 and >9000, values that corresponded to maxima in statistical parameters for the respective groups: (1) all patients (n = 79) who had both an elevated erythrocyte sedimentation rate (>30 mm/hr) and an elevated C-reactive protein level (>10 mg/L) and (2) all patients (n = 60) with an elevated erythrocyte sedimentation rate (>30 mm/hr) who did not have an elevated C-reactive protein level (=10 mg/L) combined with all patients with an elevated C-reactive protein level (>10 mg/L) who did not have an elevated erythrocyte sedimentation rate (=30 mm/hr).