Predicting the Outcome of Total Knee Arthroplasty

Lingard, Elizabeth A.; Katz, Jeffrey N.; Wright, Elizabeth A.; Sledge, Clement B.

doi:10.2106/00004623-200410000-00008

Cited by 548 publications

(465 citation statements)

References 19 publications

Supporting

Mentioning

400

Contrasting

Unclassified

Order By: Relevance

“…We confirmed the validity and responsiveness of the HFKS. As the convergent validity test revealed a correlation of the HFKS with the WOMAC in postoperative scores, and as the WOMAC and SF-36 were reported as more valid measures of outcomes of TKA than the KS knee and function scores [17], the HFKS appears to be a reasonable tool for evaluating the status of the knee after a TKA. The analysis of the responsiveness of the HFKS assessed by evaluation of whether changes in the scores of the HFKS showed correlation with changes in other scoring systems also revealed reasonable correlation between the change in HFKS and the changes in WOMAC and SF-36.…”

Section: Discussionmentioning

confidence: 93%

“…The analysis of the responsiveness of the HFKS assessed by evaluation of whether changes in the scores of the HFKS showed correlation with changes in other scoring systems also revealed reasonable correlation between the change in HFKS and the changes in WOMAC and SF-36. Among a few different measures for evaluation of responsiveness, including the internal responsiveness statistics (paired t-test, effect size, or standardized responsiveness mean) and the external responsiveness statistics (area under the receiver operating characteristic [ROC] curve, correlation, or linear regression) [11,20,25,30], the correlation method was used in the current study and also by Corzillius et al [5] and Lingard et al [17]. We believe the correlation method is appropriate for our study, because it reflects the extent to which changes in a measure over a specified time relate to corresponding changes in a reference measure of health status (SF-36 physical function in the current study), which is important to patients [11].…”

Section: Discussionmentioning

confidence: 99%

“…Although the WOMAC and SF-36 are the only two well-validated tools among the scoring systems included in this study, all of the included scoring systems have been used as reliable instruments in clinical research for measurement of knee status after TKA [3,17]. Thus, we performed a convergent validity test of the HFKS by correlation analysis with these various scoring systems.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A New High-flexion Knee Scoring System to Eliminate the Ceiling Effect

Lee

2012

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

Background Various scoring systems document improvement after TKA, but most are associated with a ceiling effect that may fail to distinguish between patients having different levels of knee function after TKA. We therefore developed a new scoring system for patients with higher levels of flexion to eliminate ceiling effects observed with current systems. Questions/purposes The purposes of this study were (1) to determine whether the high-flexion knee score eliminates the ceiling effect, (2) to assess the validity and responsiveness of the high-flexion knee score, and (3) to determine whether the high-flexion knee score can aid in differentiation of the knee status of patients at the ceiling level. Methods We prospectively studied 165 patients with 201 well-functioning knees who had undergone primary TKA. We obtained Knee Society scores, WOMAC scores, Feller scores, SF-36 scores, and high-flexion knee scores for all patients. The high-flexion knee score includes items that reflect knee function in the high functional range, such as sitting on or rising from the floor, squatting, or kneeling. We determined the ceiling effects and score distributions of various scoring systems. We performed a convergent validity test of the high-flexion knee score by correlation analysis with these various scoring systems. Responsiveness of the high-flexion knee score was assessed by correlation analysis of changes in various scoring systems. To determine whether the high-flexion knee score can aid in differentiation of knee status of patients at the ceiling level, relative responsiveness of the various scores in the ceiling versus below the ceiling range was determined. Results The high-flexion knee score showed no ceiling effect, whereas the other systems did. Addition of the highflexion knee score to the other scoring systems eliminated these ceiling effects and resulted in more normalized score distributions. The high-flexion knee score correlated (r = À0.77) with WOMAC in postoperative scores, and it also correlated with the changes in WOMAC (r = À0.69) and SF-36 physical functioning (r = 0.62).

show abstract

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A New High-flexion Knee Scoring System to Eliminate the Ceiling Effect

Lee

2012

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

show abstract

“…Preoperative psychological factors of patients such as anxiety, depression, catastrophizing state, poor self-efficacy, and poor coping skills may be preoperative predictors of unsatisfactory patient outcomes after joint replacement surgery [3,15,19,20,33,42]. The duration and magnitude of the effect these factors have on postoperative outcomes remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Do Psychological Factors Predict Poor Outcome in Patients Undergoing TKA? A Systematic Review

Khatib

Madan

Naylor

et al. 2015

Clinical Orthopaedics &Amp; Related Research

152

114

View full text Add to dashboard Cite

Background A subgroup of patients undergoing TKA is unhappy with the outcome of surgery and preoperative psychological factors may play a role in their dissatisfaction. Questions/purposes We asked whether (1) psychological factors, as measured by preoperative self-reported questionnaires, predicted poor outcome after TKA, and (2) whether certain psychological factors examined predicted poor outcome better than others. Methods We performed a systematic review and metaanalysis of prospective observational studies published in MEDLINE, CINAHL 1 , EMBASE TM , and PsycINFO 1 databases from their date of inception to October 2013, augmented with a manual search of bibliographies. Study eligibility was performed according to an a priori protocol. Included studies were assessed for quality according to the Newcastle-Ottawa scale. Two reviewers independently performed the search, identified eligible studies, assessed their methodologic quality, and extracted data. Outcomes of interest included postoperative dissatisfaction, pain, or limited function of the patients.

show abstract

“…Understanding what factors contribute to poor results after TKA is particularly useful for surgeons and healthcare providers [15]. The presence of psychological distress has been found to be associated with an increased risk of symptomatic knee osteoarthritis [14].…”

Section: Introductionmentioning

confidence: 99%