Factors predicting patient satisfaction 2 years after total knee arthroplasty for osteoarthritis.

OBJECTIVE: To identify factors predicting patient satisfaction 2 years after total knee arthroplasty (TKA) for osteoarthritis. METHODS: Prospective multicenter study of patients followed up for 2 years after TKA for osteoarthritis. We evaluated pain and function (Lequesne index and WOMAC) at baseline and after 2 years. After 2 years, the patients rated their satisfaction as a percentage, with values greater than 50% defining good satisfaction. Factors associated with good satisfaction were identified by univariate analyses followed by multivariate analysis. RESULTS: Of 299 patients, 264 completed the study (26 were lost to follow-up, six died, and three refused the 2-year evaluation), including 237 (89.8%) with satisfaction scores greater than 50%. Highly significant improvements were found after 2 years versus baseline in the Lequesne index (7.9 vs. 14.5, P<0.0001) and WOMAC index (26.3 vs. 51.3, P<0.0001). There were 26 (9.8%) complications. Factors significantly associated with good satisfaction in the multivariate model were absence of complications (P=0.004), body mass index less than 27 kg/m² (P=0.015), high radiological joint narrowing score (P=0.038), age greater or equal to 70 years (P=0.038), and absence of depression at the 2-year evaluation (P=0.002). CONCLUSION: We report the first prospective multicenter study done in France to assess pain and function in a large number of patients treated with TKA for osteoarthritis. Our results indicate a high success rate. We identified three factors that predict patient satisfaction and can be assessed before surgery (age greater than 70 years, absence of obesity, and severe joint space narrowing).

Safety, efficacy and predictive factors of efficacy of a single intra-articular injection of non-animal-stabilized-hyaluronic-acid in the hip joint: results of a standardized follow-up of patients treated for hip osteoarthritis in daily practice.

AIM: To evaluate, in daily clinical practice, the efficacy and tolerability of a single intra-articular injection of non-animal-stabilized hyaluronic acid (NASHA) in patients treated for symptomatic hip OA (HOA). METHODS: Standardized follow-up (FU). PATIENTS: forty patients suffering from HOA treated by a single intra-articular injection of NASHA in the painful hip under fluoroscopy. EVALUATION: patient global assessment (PGA) and walking pain (WP) on a 100 mm visual analogue scale, WOMAC index, Lequesne index at each visit. STATISTICS: last observation carried forward. Treatment efficacy was assessed using OMERACT-OARSI response criteria, minimal clinically important improvement (MCII), patient acceptable symptom state (PASS) obtained from PGA, WOMAC and WP. Predictive factors of efficacy were also studied. RESULTS: Efficacy evaluation: 34 patients were assessable (mean FU 159 days). All clinical variables (WP, PGA, WOMAC, Lequesne index) decreased significantly between baseline and last evaluation. Twenty-two patients (71%) were classified OMERACT-OARSI responders, 25 subjects (75.8%) were classified PASS+, and 19 (61.3%) fulfilled criteria for MCII. Out of clinical and radiological variables only Lequesne index (p = 0.04) and WOMAC (p = 0.04) at baseline were found to be predictive of treatment efficacy. Safety evaluation: the treatment was well tolerated. There were no severe adverse events related to the treatment or to the procedure. However 15 of the 28 assessable patients experienced transient increase of pain in the target hip during the first week after injection. CONCLUSION: Viscosupplementation of the hip with NASHA is easily feasible in daily clinical practice, safe and well tolerated despite a frequent increase of pain the days following injection. Prospective controlled trials are needed to confirm these data and to evaluate both safety and efficacy of a second course of treatment.

Cross-sectional study of pain and disability at knee replacement surgery for osteoarthritis in 299 patients.

OBJECTIVE: To evaluate pain and disability at the time of knee replacement surgery for osteoarthritis. METHODS: In this multicenter cross-sectional study, 299 patients at 12 orthopedic surgery centers in Lyon, France were evaluated on the day before knee replacement surgery. Pain severity was assessed on a visual analog scale (VAS) and function using the Lequesne index and the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC). RESULTS: There were 207 women and 92 men with a mean age of 73 years. Mean (+/-SD) VAS pain score upon walking was 55.8+/-24mm. Compared to patients with very severe disability (Lequesne index>12), those with mild-to-severe disability (Lequesne index27kg/m(2) (OR, 2.2; 95%CI, 1.3-3.3) and to engage in sporting activities (OR, 3.3; 95%CI, 1.4-10). CONCLUSION: Patients about to undergo knee replacement surgery had high levels of pain and disability, with little variation across centers. Nevertheless, the severity of pain and disability may depend in part on age, gender, body mass index, and sporting activities, which probably influence the decision to perform knee replacement surgery.

Anti-tumor necrosis factor alpha therapy in fifteen patients with AA amyloidosis secondary to inflammatory arthritides: a followup report of tolerability and efficacy.

OBJECTIVE: Because anti-tumor necrosis factor alpha (anti-TNF) has emerged as a highly effective treatment for numerous inflammatory arthritides, which are a common cause of AA amyloidosis, we retrospectively evaluated the safety and efficacy of anti-TNF in a nationwide study. METHODS: The rheumatology departments of all French teaching hospitals were contacted by mail to obtain the files of patients with histologically proven secondary AA amyloidosis and renal involvement who were treated with anti-TNF. Efficacy was assessed as a sustained decrease in 24-hour proteinuria and a stable/improved glomerular filtration rate (GFR). RESULTS: Among the 15 patients studied, the 24-hour proteinuria was 4.5 +/- 3.6 gm (mean +/- SD), creatininemia was 178.4 +/- 74.9 micromoles/liter, and GFR was 46 +/- 23 ml/minute before starting anti-TNF. Ten patients received infliximab, 4 received etanercept, and 1 received both types of treatment. The mean followup was 10.4 months. No severe adverse events were recorded; one episode of herpes zoster in the first branch of the trigeminal nerve occurred after one infusion of infliximab. Amyloidosis progressed in 7 patients and was stabilized in 5 patients. Three patients (receiving infliximab alone, infliximab plus methotrexate [MTX], or etanercept plus MTX) experienced rapid, dramatic, and sustained decreases in proteinuria (>or=80%), with the GFR increasing 15-78%. CONCLUSION: Anti-TNF was well-tolerated and safe in the 15 patients with AA amyloidosis and renal involvement. The pathogenic role of TNF in AA amyloidosis, the sustained proteinuria decrease in 3 patients, and the stabilization of renal parameters in 5 other patients make anti-TNF a promising candidate to treat AA amyloidosis secondary to inflammatory arthritides.

Measurement of radiographic joint space width in the tibiofemoral compartment of the osteoarthritic knee: comparison of standing anteroposterior and Lyon schuss views.

OBJECTIVE: To evaluate progression of joint space narrowing in radiographs of osteoarthritic (OA) knees imaged in both the standing anteroposterior (AP) and the Lyon schuss positions, using alternative methods to measure joint space width (JSW). METHODS: Standing AP (extended view) and Lyon schuss (posteroanterior [PA] view, with 20-30 degrees of flexion) radiographic images of 58 OA knees were obtained twice (at baseline and 2 years later). With both methods, fluoroscopy was used to align the anterior and posterior margins of the medial or lateral tibial plateau with the central x-ray beam. Minimum JSW, mean JSW, and joint space area (JSA) of the medial or lateral femorotibial joint space were measured using a new digital image analysis system. The effects of knee flexion versus extension and parallel versus nonparallel tibial plateau alignment were evaluated with respect to the reproducibility of JSW in repeated examinations (intraclass correlation coefficient [ICC]), the mean of within-knee standard deviations of repeated measurements (SD(m)), and the sensitivity to changes in JSW in serial radiographs (standardized response mean [SRM]). RESULTS: The performance of the new software, as assessed by the reproducibility of repeated measurements of minimum JSW on the same image, was excellent in both the standing AP (ICC = 0.98) and Lyon schuss radiographs (2 SD(m) = 0.5 mm, ICC = 0.98). The reproducibility in different radiographs of the same knee was not evaluated. However, over 2 years, the mean (+/- SD) decrease in the minimum JSW of OA knees was 0.17 +/- 0.75 mm in standing AP radiographs (P not significant) and 0.24 +/- 0.50 mm in Lyon schuss views (P = 0.007), with SRMs of 0.23 and 0.48, respectively. The quality of alignment of the tibial plateau was satisfactory (<1 mm between anterior and posterior margins of the medial tibial plateau) in 66% of the pairs of Lyon schuss radiographs and in 57% of the pairs of standing AP radiographs. In the Lyon schuss radiographs, SRM was highly dependent on tibial plateau alignment. Minimum JSW was more sensitive to change than was mean JSW or JSA, in paired Lyon schuss radiographs that exhibited satisfactory alignment. CONCLUSION: Compared with the standing AP radiograph, PA imaging of the knee in 20-30 degrees flexion (the schuss position) increases the reproducibility of radiographic JSW measurements in OA knees and the sensitivity to change in JSW in serial radiographs. Sensitivity to change in minimum JSW is notably increased by aligning the medial tibial plateau with the central x-ray beam in the Lyon schuss radiograph.