Knee Surg Sports Traumatol Arthrosc DOI 10.1007/s00167-015-3970-4
KNEE
Joint awareness in osteoarthritis of the hip and knee evaluated with the ‘Forgotten Joint’ Score before and after joint replacement E. Thienpont1 · A. Vanden Berghe1 · P. E. Schwab1 · J. P. Forthomme2 · O. Cornu1
Received: 22 July 2015 / Accepted: 22 December 2015 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2016
Abstract Purpose To utilize the ‘Forgotten Joint’ Score (FJS), a 12-item questionnaire analysing the ability to forget the joint, for comparing preoperative status in osteoarthritic patients scheduled for total hip arthroplasty (THA) or total knee arthroplasty (TKA). Higher scores represent a better result with a maximum of 100. The hypothesis of this study was that a preoperative difference in favour of hip arthritis could eventually explain why THA is cited more often as a forgotten joint than TKA. Methods A prospective cohort study was conducted in 150 patients with either tricompartmental knee (n = 75) or hip osteoarthritis (n = 75). Patients completed FJS-12 scores preoperatively and 1 year postoperatively. Results A similar preoperative FJS-12 was observed for hip (22 (15)) and knee osteoarthritis (24 (17)) (n.s.). The postoperative FJS-12 score was significantly higher for THA (80 (24)) than for TKA (70 (27)) (p 30 kg/m2; and ≤60, 60–70, and >70 years, respectively. To determine significant differences between baseline variables, the Pearson Chi-square test was used for categorical variables and the Student’s t test for continuous variables. Associations between the preoperative FJS-12 and covariates of interest: joint (hip versus knee), sex, age, and BMI were assessed with a t test for independent samples or with a one-way analysis of variance (ANOVA), as appropriate. Test–retest reliability for the FJS-12 was assessed using the intraclass correlation coefficient (ICC) between the first and second application of the FJS-12 for the knee population.
The responsiveness of the FJS-12 Score in detecting changes was determined by calculating the effect size (ES) (Cohen’s d) and standardized response mean (SRM). ES was calculated as the difference between the preoperative and postoperative means divided by the SD of the preoperative mean. SRM was calculated as the difference between the preoperative and postoperative means divided by the SD of the change. The size of both groups was determined after a power calculation based on the previous literature [26, 27]. Statistical analysis was conducted with SPSS 18 Statistical Software (SPSS Inc, Chicago, IL, USA), and significance was set at p
KNEE
Joint awareness in osteoarthritis of the hip and knee evaluated with the ‘Forgotten Joint’ Score before and after joint replacement E. Thienpont1 · A. Vanden Berghe1 · P. E. Schwab1 · J. P. Forthomme2 · O. Cornu1
Received: 22 July 2015 / Accepted: 22 December 2015 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2016
Abstract Purpose To utilize the ‘Forgotten Joint’ Score (FJS), a 12-item questionnaire analysing the ability to forget the joint, for comparing preoperative status in osteoarthritic patients scheduled for total hip arthroplasty (THA) or total knee arthroplasty (TKA). Higher scores represent a better result with a maximum of 100. The hypothesis of this study was that a preoperative difference in favour of hip arthritis could eventually explain why THA is cited more often as a forgotten joint than TKA. Methods A prospective cohort study was conducted in 150 patients with either tricompartmental knee (n = 75) or hip osteoarthritis (n = 75). Patients completed FJS-12 scores preoperatively and 1 year postoperatively. Results A similar preoperative FJS-12 was observed for hip (22 (15)) and knee osteoarthritis (24 (17)) (n.s.). The postoperative FJS-12 score was significantly higher for THA (80 (24)) than for TKA (70 (27)) (p 30 kg/m2; and ≤60, 60–70, and >70 years, respectively. To determine significant differences between baseline variables, the Pearson Chi-square test was used for categorical variables and the Student’s t test for continuous variables. Associations between the preoperative FJS-12 and covariates of interest: joint (hip versus knee), sex, age, and BMI were assessed with a t test for independent samples or with a one-way analysis of variance (ANOVA), as appropriate. Test–retest reliability for the FJS-12 was assessed using the intraclass correlation coefficient (ICC) between the first and second application of the FJS-12 for the knee population.
The responsiveness of the FJS-12 Score in detecting changes was determined by calculating the effect size (ES) (Cohen’s d) and standardized response mean (SRM). ES was calculated as the difference between the preoperative and postoperative means divided by the SD of the preoperative mean. SRM was calculated as the difference between the preoperative and postoperative means divided by the SD of the change. The size of both groups was determined after a power calculation based on the previous literature [26, 27]. Statistical analysis was conducted with SPSS 18 Statistical Software (SPSS Inc, Chicago, IL, USA), and significance was set at p
