The purpose of this study was to determine agreement between responses on electronic and paper versions of the WOMAC and SF-12(v2) questionnaires following total hip and total knee arthroplasty. Patients completed both electronic and paper questionnaires with a one week interval in-between. The order in which they completed the two versions was randomly assigned. A total of 53 patients completed the study, with a mean age of 69 years (range 50–90 years). The intraclass correlation coefficients (ICC) were high, indicating excellent agreement (WOMAC ICC = 0.96, 95% CI 0.94–0.98), SF-12 (PCS) ICC = 0.95, 95% CI 0.92–0.97; SF-12 (MCS) ICC = 0.92, 95%CI 0.86–0.95). Online data collection may be substituted for the traditional paper method with no significant effect on the criterion validity of the questionnaires.
The Journal of Arthroplasty, Volume 29, Issue 4, 670 - 673
Patients Respond Similarly to Paper and Electronic Versions of the WOMAC and SF-12 Following Total Joint ArthroplastyMarsh, Jacquelyn D. et al.