Investigating the True Effect of Psychological Variables Measured Prior to Arthroplastic Surgery on Postsurgical Outcomes: A P-Curve Analysis.

Patients' presurgical psychological profiles have been posited to predict pain and function following arthroplastic surgery of the hip and knee. Nevertheless, findings are conflicting, and this may be rooted in biased reporting that makes the determination of evidential value difficult. This ambiguity may have negative consequences for researchers and governmental agencies, as these rely on findings to accurately reflect reality. P-Curve analyses were used to establish the presence of evidential value and selective reporting in a sample of studies examining the effect of presurgical psychological predictors on outcomes following knee and hip arthroplastic surgery. A systematic search of the literature revealed 26 relevant studies. The examined sets of studies indicate that there is evidential value for the effect of depression on pain intensity and function, anxiety on pain intensity and function, pain catastrophizing on pain intensity, as well as the combined effects of all psychological predictors on pain intensity and function. The presence of evidential value was inconclusive for the effect of optimism on pain intensity. There were no signs that any results were influenced by biased reporting. The results highlight the importance of patients' psychological profiles in predicting surgical outcomes, which represent a promising avenue for future treatment approaches. PERSPECTIVE: The effects of P-hacking are difficult to detect and might be at the root of conflicting findings pertaining to the predictive properties of presurgical psychological variables on postsurgical outcomes. P-Curve analysis allows the determination of evidential value underlying these relationships and detection of P-hacking to ensure that findings are not the result of selective reporting.

The Effect of Preexisting and Shoulder-Specific Depression and Anxiety on Patient-Reported Outcomes After Arthroscopic Rotator Cuff Repair.

BACKGROUND: Few studies have considered the potential effect of depression or anxiety on outcomes after rotator cuff repair. PURPOSE: To evaluate the effect of a preexisting diagnosis of depression or anxiety, as well as the feeling of depression and anxiety directly related to the shoulder, on the American Shoulder and Elbow Surgeons (ASES) score. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: This study is a retrospective review of prospectively collected data on patients who underwent arthroscopic rotator cuff repair and were evaluated by the ASES score preoperatively and at a minimum 12 months postoperatively as part of the senior author's shoulder registry. Preexisting diagnoses of depression and/or anxiety were recorded, and questions from the Western Ontario Rotator Cuff Index directed at feelings of depression or anxiety related to the shoulder were also evaluated. The Wilcoxon rank sum test was used to compare ASES scores between patients with and without anxiety and/or depression. Spearman correlation was used to correlate questions on depression and anxiety with ASES scores. RESULTS: A total of 187 patients (63 females, 124 males; mean age, 58.6 years, SD, 8.7 years) undergoing arthroscopic rotator cuff repair were evaluated with a mean follow-up of 47.5 months (SD, 17.4 months; range, 12-77 months). Fifty-three patients (mean age, 60 years; SD, 8.6 years) had preexisting diagnoses of depression and/or anxiety and 134 patients (mean age, 58.1 years; SD, 8.7 years) did not. Patients with depression and/or anxiety had significantly lower preoperative and postoperative ASES scores (60.7 vs 67.8, P = .014; and 74.6 vs 87.1, P = .008, respectively). The change in ASES scores from preoperative to postoperative, however, was not significantly different (18.0 vs 14.9). A higher score of depression or anxiety related to the shoulder had a negative correlation with the preoperative (r = -0.76, P < .0001; and r = -0.732, P < .0001, respectively) and postoperative (r = -0.31, P = .0001; and r = -0.31, P = .0003, respectively) ASES scores, but a positive correlation (r = 0.50, P < .0001; and r = 0.43, P < .0001, respectively) with the change in ASES scores. CONCLUSION: Patients with a history of depression and/or anxiety have lower outcome scores preoperatively and postoperatively; however, they should expect the same amount of relief from arthroscopic rotator cuff repair as those without a history of depression or anxiety. Stronger feelings of depression or anxiety directly related to the shoulder correlated with lower preoperative and postoperative outcome scores, but a greater amount of improvement from surgery. The results from this study suggest that a preexisting diagnosis of depression or anxiety, as well as feelings of depression or anxiety directly related to the shoulder, should be considered during the management of patients with rotator cuff tears.

The effect of mindfulness training prior to total joint arthroplasty on post-operative pain and physical function: A randomised controlled trial.

OBJECTIVE: To evaluate the efficacy of Mindfulness-Based Stress Reduction (MBSR) in improving pain and physical function following total joint arthroplasty (TJA). DESIGN: Two-group, parallel-group, randomised controlled trial, conducted between September 2012 and May 2017. SETTING: Single centre study conducted at a University-affiliated, tertiary hospital. INTERVENTION: People with arthritis scheduled for TJA, with a well-being score <40 (Short Form-12 Survey) were randomly allocated to a pre-surgery eight-week MBSR program or treatment as usual (TAU). OUTCOME MEASURES: Self-reported joint pain and function at 12 months post-surgery, assessed using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). Secondary outcomes were knee stiffness and global improvement (WOMAC); physical and psychological well-being (Veterans RAND 12-item Health Survey); self-efficacy (Arthritis Self-Efficacy Scale); and mindfulness (5-Factor Mindfulness Questionnaire). RESULTS: 127 participants were randomised; 65 to MBSR and 62 to TAU, of which 45 participants allocated to the intervention and 56 participants allocated to usual care proceeded to surgery and 100 (99%) completed primary outcome measures. Greater improvements in knee pain (mean difference, -10.3 points, 95% CI -19.0 to -1.6; P = 0.021) and function (mean difference, -10.2 points, 95% CI -19.2 to -1.3; P = 0.025) at 12 months post-surgery were observed in the MBSR group compared to the TAU group. A between group difference in global scores (-9.5 points, 95% CI -17.9 to -1.1; P = 0.027) was also observed. No other differences in secondary outcomes were observed. CONCLUSION: MBSR improves post-surgery pain and function in people with psychological distress undergoing TJA. Further research is required to examine potential barriers to broader implementation and uptake.

Total Joint Arthroplasty Patients' Education on Financial Issues and Its Connection to Reported Out-of-Pocket Costs-A European Study.

PURPOSE: Total joint arthroplasty is accompanied by significant costs. In nursing, patient education on financial issues is considered important. Our purpose was to examine the possible association between the arthroplasty patients' financial knowledge and their out-of-pocket costs. METHODS: Descriptive correlational study in five European countries. Patient data were collected preoperatively and at 6 months postoperatively, with structured, self-administered instruments, regarding their expected and received financial knowledge and out-of-pocket costs. FINDINGS: There were 1,288 patients preoperatively, and 352 at 6 months. Patients' financial knowledge expectations were higher than knowledge received. Patients with high financial knowledge expectations and lack of fulfillment of these expectations had lowest costs. CONCLUSION: There is need to establish programs for improving the financial knowledge of patients. Patients with fulfilled expectations reported higher costs and may have followed and reported their costs in a more precise way. In the future, this association needs multimethod research.

How Rheumatoid Arthritis Patients Make Decisions Regarding Hand Reconstruction: A Qualitative Study from the Silicone Arthroplasty in Rheumatoid Arthritis Project.

BACKGROUND: Previous studies have determined specific factors influencing patients with rheumatoid arthritis to choose to undergo reconstructive hand surgery. However, little is known about how rheumatoid arthritis patients are counseled by physicians regarding surgical options and the concerns that cause patients to decide not to undergo hand surgery reconstruction. The authors conducted a qualitative study to investigate the decision-making process rheumatoid arthritis patients undergo when deciding about surgical treatment, including the specific involvement from their physicians in the decision. METHODS: Participants were recruited from the ongoing international collaborative Silicone Arthroplasty in Rheumatoid Arthritis study. Twenty semistructured interviews were conducted, and data were analyzed using grounded theory methodology. RESULTS: Eight of the 11 participants that underwent metacarpophalangeal joint arthroplasty indicated that improving hand function was the primary reason they chose to undergo surgery. Four of these participants were concerned about the aesthetics of their hands, whereas five of the eight participants who discussed their reasoning for not undergoing surgery felt aesthetics was not a good enough reason to undergo surgery. Three participants indicated that a negative perception of hand surgery by their rheumatologists discouraged them from the procedure. Finally, most (14 of 18) participants chose to make the final decision about surgery without involvement from their physician. CONCLUSIONS: The decision of whether or not to undergo surgery can be personal, and patients may prefer to make the final decision independently. It is important that rheumatoid arthritis patients receive collaborative counseling from their rheumatologists and hand surgeons to ensure they are making a knowledgeable decision.

Predictors of disease-specific quality of life after arthroscopic rotator cuff repair.

PURPOSE: Disease-specific instruments of quality of life (QOL) are more sensitive to disease-specific changes. The purpose of this study is to identify prognostic factors for disease-specific QOL after all-arthroscopic rotator cuff (RC) repair using the Western Ontario Rotator Cuff Index (WORC). METHODS: A total of 140 patients were evaluated after an RC repair with a mean follow-up of 22 ± 6.7 months. Evaluations included the WORC, EQ-5D and anchor questions. Preoperative patient demographics and radiologic characteristics were assessed to identify predictors of disease-specific QOL. RESULTS: Most patients (81.4 %) were satisfied with their surgical result. Minor tear retraction (odds ratio [OR] 2.97, p = 0.030), male gender (OR 3.67, p = 0.003), no social benefits (OR 3.67, p = 0.042) and pre-surgical complaints for more than six months (OR 3.03, p = 0.021) were independent predictors for superior postoperative WORC score in multivariable analysis. None of these factors were predictive for a higher EQ-5D score. CONCLUSION: These findings highlight the important impact of retraction on QOL after RC repair and underline the utility of disease-specific instruments. Future studies should focus on how these significant predictors can be used to improve decision making and to develop new treatment approaches.

Patient-reported outcomes in the Swedish National Quality Registers.

Patient-reported outcomes (PROs) are important in the healthcare system to gain understanding of patients' views on the effects of a treatment. There is an abundance of available patient-reported outcome measures (PROMs), both disease specific and generic. In the Swedish healthcare system, the national quality registers are obliged to incorporate PROs for certification at a high level. A review of the latest annual applications for funding (n = 108) shows that at present, 93 national quality registers include some form of PROM or patient-reported experience measure (PREM). Half of the registers include some type of generic measure, more than half include disease/symptom-specific measures, and around 40% include PREMs. Several different measures and combinations of measures are used, the most common of which are the EQ-5D, followed by the SF-36/RAND-36. About one-fifth of the registers report examples of how patient-reported data are used for local quality improvement. These examples include enhancing shared decision-making in clinical encounters (most common), as a basis for care plans, clinical decision aids and treatment guidelines, to improve the precision of indications for surgery (patient and healthcare professional assessments may differ), to monitor complications after the patient has left hospital and to improve patient information. In addition, funding applications reveal that most registers plan to extend their array of PROMs and PREMs in future, and to increase their use of patient-reported data as a basis for quality improvement.

The effectiveness of orthopedic patient education in improving patient outcomes: a systematic review protocol.

REVIEW OBJECTIVE: The objective of this review is to identify the effectiveness of patient education for orthopedic surgery patients. More specifically, the objectives are to identify the effectiveness of patient education on:length of staysatisfactionpain levelcost of carefunctional abilitiesknowledgeanxietyquality of life in orthopedic settings. BACKGROUND: Patient education is an essential part of practice for all healthcare professionals. In the orthopedic setting, effective patient education contributes to positive patient outcomes. Patient education is critical to ensure that patients receive appropriate information to assist in the pre-admission, peri-operative treatment and rehabilitation process for the patient. The process of patient education is essentially one where the patient comes to understand his or her physical condition and self-care using the experience and guidance of the multidisciplinary team.With an effective and well-structured patient education program, the cost benefit for health care provider and patient includes a shortened length of stay, and reduced cost of care. According to Huang et al. a simplified pre-operative education program reduced the length of stay and cost of care. Similarly, Jones et al. found that length of stay of a patient who received pre-operative education was reduced. In that study, the mean length of stay was significantly reduced from seven days in patients who did not received pre-operative education to five days in patients who received pre-operative education. These results suggest that pre-operative education programs are an effective method in reducing the length of stay of orthopedic patients.Johansson et al. also described pre-operative education for orthopedic patients in a systematic review published in 2005. They discussed the effect of patient education on the orthopedic patient and found that knowledge, anxiety, pain, length of hospital stay, performance of exercise and mobilization, self-efficacy, patient compliance, adherence and empowerment were all improved as a result of patient education. While Johansson et al. included studies up to 2003, the proposed systematic review will include studies from 2003 to 2013.Kruzik also reported benefits of decreased length of stay, reduced pain medication requested post-operatively together with increased patient and family member satisfaction. Bastable reported benefits of patient education, including increased patient satisfaction, improved quality of life, enhanced continuity of care, decreased anxiety, fewer complications, promotion of adherence to the plan of care, maximized independence, and empowerment.Types of education involved in this systematic review are patient education, pre-operative education, and discharge education. Only one study discussed discharge education and the outcome from this review. The outcomes that have been discussed in this systematic review include length of stay, satisfaction, pain level,, 21 cost of care, functional abilities, knowledge, anxiety, and quality of life.Major outcomes discussed in these studies are length of stay, pain,, 21 functional abilities, and anxiety. Most of these studies found significant results of reduced length of stay on those patients who received patient education compared to patient who did not received any patient education or information. Studies support the positive outcomes around length of stay.Common orthopedic conditions that have been discussed are osteoarthritis with total arthroplasty either hip or knee or joint replacement. A study on spinal surgery patients and the effects of pre-operative education, which stated that although there are many studies on the effectiveness on patient education, there are missing data on spinal surgery. This study found that the implementation of patient education has positive impacts upon patient satisfaction especially in managing pain.This review will look specifically at the effectiveness of orthopedic patient education for length of stay, satisfaction, pain level, cost of care, functional ability, knowledge, anxiety, and quality of life.

Religiousness, religious coping with illness, and psychological function among Polish elderly patients with osteoarthritis undergoing arthroplasty.

To determine the influence of religious coping and religiousness on the psychological functioning of Polish patients before and after arthroplasty, a prospective study was performed. Out of a pool of 102 potential participants, a total of 61 (34 females, 27 males) completed a purposely created survey, Brief-COPE followed by preoperative and postoperative Perceived Stress Scale, State Trait Anxiety Inventory and Satisfaction with Life Scale. Religious coping was not associated with: (1) perceived stress before or after surgery; (2) preoperative or postoperative anxiety; (3) life satisfaction. A two-factor ANOVA has shown that religious coping controlled by religiousness was related to better psychological functioning. Between- and within-subjects effects were observed for improvement in life satisfaction measured by split-plot ANOVA, which suggests (p < 0.05) that such improvement was greater among subjects of higher religious orientation. We concluded that religious strategies in dealing with stress measured by Brief-COPE were least likely to benefit patients of low-religious orientation. The study demonstrated the importance of core religious beliefs in predicting benefits derived from religiousness in the face of a crisis. This study showed that regardless of its effectiveness, turning to religion is common among Polish patients about to undergo surgery for osteoarthritis of the hip.

Psychometric properties of two questionnaires in the context of total wrist arthroplasty.

INTRODUCTION: Patient-rated outcome measures are frequently used to assess the results of total wrist arthroplasty, but their psychometric properties have not yet been evaluated in this group of patients. The purpose of our study was to assess the psychometric properties of the Danish Quick Disabilites of Arm Shoulder and Hand (QuickDASH) and Patient-rated Wrist Evaluation questionnaires in patients with total wrist arthroplasty. METHODS: In a prospective cohort of 102 cases, we evaluated the QuickDASH. Furthermore, in a cross-sectional study and a test-retest on a subgroup of the patients, we evaluated the Patient-rated Wrist Evaluation. RESULTS: Internal consistency and reproducibility were very high (Cronbach's alpha 0.96/0.97; Spearman's rho 0.90/ 0.91; intraclass coefficient 0.91/0.92), and there were no floor or ceiling effects. The responsiveness of the QuickDASH was high (standardised response mean 1.06 and effect size 1.07). The construct validity of both scales was confirmed by three a priori formulated hypotheses: a moderate, negative correlation of scores with grip-strength; a moderate, positive correlation with pain and a very weak or no correlation with mobility. Rheumatoid patients scored significantly higher on the QuickDASH than other patients did. The scores of both questionnaires were very closely related. CONCLUSION: Both questionnaires are valid and equivalent for use in patients with total wrist arthroplasty. FUNDING: This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. TRIAL REGISTRATION: not relevant.

The influence of psychiatric comorbidity on perioperative outcomes after shoulder arthroplasty.

BACKGROUND: Psychiatric comorbidity has been associated with increased health risks and poor long-term treatment outcomes in numerous medical disciplines, but its effect in short-term perioperative settings is incompletely understood. The purpose of this study was to evaluate the influence of a preoperative diagnosis of depressive disorder, anxiety disorder, schizophrenia, or dementia on in-hospital (1) adverse events, (2) blood transfusion, and (3) nonroutine discharge in patients undergoing shoulder arthroplasty. METHODS: Using the National Hospital Discharge Survey (NHDS) database, we identified 348,824 discharges having undergone partial or total shoulder arthroplasty from 1990 to 2007. Multivariable regression analysis was performed for each of the outcome variables. RESULTS: The prevalence of diagnosed depressive disorder was 4.4%, anxiety disorder, 1.6%; schizophrenia, 0.6%; and dementia, 1.5%. Preoperative psychiatric disorders, with the exception of schizophrenia, were associated with higher rates of adverse events. Depression and schizophrenia were associated with higher perioperative rates of blood transfusion. Any preoperative psychiatric illness was associated with higher rates of nonroutine discharge. CONCLUSIONS: Patients with preoperative psychiatric illness undergoing shoulder arthroplasty are at increased risk for perioperative morbidity and posthospitalization care. Preoperative screening of psychiatric illness might help with planning of shoulder arthroplasty.

Validity and responsiveness of the Core Outcome Measures Index (COMI) for the neck.

PURPOSE: Patient-orientated outcome questionnaires are essential to evaluate treatment success. To compare different treatments, hospitals, and surgeons, standardised questionnaires are required. The present study examined the validity and responsiveness of the Core Outcome Measurement Index for neck pain (COMI-neck), a short, multidimensional outcome instrument. METHODS: Questionnaires were completed by patients with degenerative problems of the cervical spine undergoing cervical disc arthroplasty before (N = 89) and 3 months after (N = 75) surgery. The questionnaires comprised the EuroQol-Five Dimension (EQ-5D), the North American Spine Society Cervical Spine Outcome Assessment Instrument (NASS-cervical) and the COMI-neck. RESULTS: The COMI and NASS-cervical scores displayed no notable floor or ceiling effects at any time point whereas for the EQ-5D, the highest values [corrected] were reached in around 32.5% of patients at follow-up. With one exception (symptom-specific well-being), the individual COMI items and the COMI summary score correlated to the expected extent (R = 0.4-0.8) with the scores of the chosen reference questionnaires. The area under the curve (AUC) generated by ROC analysis was significantly higher for the COMI (0.96) than for any other instrument/subscale when self reported treatment outcome was used as the external criterion, dichotomised as "good" (operation helped a lot/helped) versus "poor" (operation helped only a little/didn't help/made things worse). The COMI had a high effect size (standardised response mean; SRM) (2.34) for the good global outcome group and a low SRM for the poor outcome group (0.34). The EQ-5D and the NASS-cervical lacked this ability to differentiate between the two groups, showing less distinct SRMs for good and poor outcome groups. CONCLUSIONS: This study provides evidence that the COMI-neck is a valid and responsive questionnaire in the population of patients examined. Further investigations should examine its applicability in other patient groups with less severe neck pain or undergoing other treatment modalities.

The effect of social support on functional recovery and wellbeing in older adults following joint arthroplasty.

Projections by the U.S. Census Bureau indicate a continual rise in the population of older adults. Along with increased dependency among older adults, chronic illness and aging may have attendant social and personal concerns in the areas of health care, community health services, and quality of life. Direct and indirect costs of osteoarthritis are $120 billion per year in medical treatment and lost wages. Every year more than 300,000 knee replacements and 120,000 hip replacements are performed in the United States (Sapountzi-Krepia et al., 2007). A large percentage of joint replacement patients have now assumed responsibility for their recovery process. This exploratory study assessed and measured social support and evaluated its impact on functional recovery and well-being in older adults after joint arthroplasty. Although social support, associated with the covariates of "living arrangements" and "age," demonstrated a positive relationship with perceived wellbeing, no relationship was demonstrated with high or low levels of social support and functional recovery.

Comparative study of the quality of life between arthrodesis and total arthroplasty substitution of the ankle.

Our goal was to compare the health status of patients with primary and secondary arthrosis of the ankle before and after arthrodesis or total substitution arthroplasty, and to determine the improvement in quality of life and whether there is any difference between these techniques. A prospective comparative study of clinical-functional evaluation was performed using the American Orthopaedic Foot & Ankle Society (AOFAS) scale and quality of life with the short form (SF)-36 questionnaire in patients who underwent arthrodesis (16 cases) or total substitution arthroplasty of the ankle (14 cases) after 2 years (mean, 25.2 months) of follow-up after surgery, in comparison with the baseline preoperative status. In this series of comparable patients, both techniques showed a statistically significant improvement with regard to the clinical evaluation and quality of life after 2 years of follow-up; the arthrodesis group increased from mean AOFAS values of 37.12 to 45.62 (P = .055) and mean SF-36 values of 32.96 to 46.25 (P = .008), whereas in the arthroplasty group the mean values of AOFAS increased from 33 to 62 (P = .024) and SF-36 from 33.62 to 59.84 (P = .001). Nevertheless, in all cases the improvement was statistically greater in patients who underwent arthroplasty than in those who underwent arthrodesis (P = .048 for AOFAS, and P = .026 for SF-36). In conclusion, arthrodesis and arthroplasty represent good options in the surgical treatment of ankle arthrosis, providing both a significant improvement in function and in the health perception and quality of life of the patient. New-generation total ankle substitution arthroplasty provides an improvement in the quality of life and perception of general health of the patient with arthrosis of this joint, when this technique is compared with surgical fusion.

Metacarpophalangeal arthroplasty from the patient's perspective.

The results of metacarpophalangeal (MCP) arthroplasty have been measured by objective measures and, to a lesser extent, subjective measures. The aim of this study was to understand patients' goals for MCP arthroplasty and the changes that occurred for them after surgery. Twenty of 24 patients reported that their MCP arthroplasty was successful because their function, pain, or hand appearance improved after the surgery. Functional changes related to how an activity was performed rather than new abilities being enabled by the surgery. There are many qualities to changes in pain and function, which closed-ended questions would not capture. Patients may not have attempted all normal activities within the first four postoperative months; therefore, functional outcomes must be measured after four months. Concurrent surgical, pharmaceutical, and therapy interventions also change patients' function, making the exact effects of the MCP arthroplasty unclear.

The effect of total shoulder arthroplasty on self-assessed health status is comparable to that of total hip arthroplasty and coronary artery bypass grafting.

The purpose of this study was to assess the impact of total shoulder arthroplasty on the self-assessed health status of a large series of patients with glenohumeral osteoarthritis. In 91 patients we were able to compare the 8 quantitative domains of Short Form-36 (SF-36) before surgery and at 30 to 60 months after surgery. These preoperative and postoperative scores were compared with data from an age- and gender-matched control population. These results were also compared with those reported for patients who underwent other common, effective surgical procedures. Preoperative SF-36 values were significantly lower than population controls for 6 of 8 SF-36 domains (physical function, social function, physical role function, emotional role function, vitality, and comfort). Patients improved significantly in 4 of 8 SF-36 domains at 30 to 60 months after total shoulder arthroplasty: physical role function (P <.01), comfort (P <.01), social function (P <.01), and mental health (P <.05). Although the improvements were significant and similar to the postoperative scores reported for total hip arthroplasty and coronary bypass procedures, the scores did not reach those of the general population.

The Norwegian Arthroplasty Register: 11 years and 73,000 arthroplasties.

In 1985, the Norwegian Orthopaedic Association decided to establish a national hip register, and the Norwegian Arthroplasty Register was started in 1987. In January 1994, it was extended to include all artificial joints. The main purpose of the register is to detect inferior results of implants as early as possible. All hospitals participate, and the orthopedic surgeons are supposed to report all primary operations and all revisions. Using the patient's unique national social security number, the revision can be linked to the primary operation, and survival analyses of the implants are done. In general, the survival analyses are performed with the Kaplan-Meier method or using Cox multiple regression analysis with adjustment for possible confounding factors such as age, gender, and diagnosis. Survival probabilities can be calculated for each of the prosthetic components. The end-point in the analyses is revision surgery, and we can assess the rate of revision due to specific causes like aseptic loosening, infection, or dislocation. Not only survival, but also pain, function, and satisfaction have been registered for subgroups of patients. We receive reports about more than 95% of the prosthesis operations. The register has detected inferior implants 3 years after their introduction, and several uncemented prostheses were abandoned during the early 1990s due to our documentation of poor performance. Further, our results also contributed to withdrawal of the Boneloc cement. The register has published papers on economy, prophylactic use of antibiotics, patients' satisfaction and function, mortality, and results for different hospital categories. In the analyses presented here, we have compared the results of primary cemented and uncemented hip prostheses in patients less than 60 years of age, with 0-11 years' follow-up. The uncemented circumferentially porous- or hydroxyapatite (HA)-coated femoral stems had better survival rates than the cemented ones. In young patients, we found that cemented cups had better survival than uncemented porous-coated cups, mainly because of higher rates of revision from wear and osteolysis among the latter. The uncemented HA-coated cups with more than 6 years of follow-up had an increased revision rate, compared to cemented cups due to aseptic loosening as well as wear and osteolysis. We now present new findings about the six commonest cemented acetabular and femoral components. Generally, the results were good, with a prosthesis survival of 95% or better at 10 years, and the differences among the prosthesis brands were small. Since the practice of using undocumented implants has not changed, the register will continue to survey these implants. We plan to assess the mid- and long-term results of implants that have so far had good short-term results.

Fatigue after major joint arthroplasty: relationship to preoperative fatigue and postoperative emotional state.

Fatigue has been widely assumed to increase after major surgery, and possible physical explanations have been intensively investigated. Nevertheless, existing data are almost exclusively from abdominal surgery and are based on the use of a single visual analogue scale. Moreover, no physical basis has been found. The present study used a more homogeneous surgical model than has been employed hitherto in order to find whether fatigue was related to emotional state. We measured fatigue before and 1 and 7 weeks after major joint arthroplasty in 63 patients, using a questionnaire that separates mental and physical fatigue. Physical function and subjective emotional and somatic state were measured at the same times; optimism was measured preoperatively. Neither mental nor physical fatigue increased after this form of surgery. Mental and physical fatigue each correlated with low positive mood throughout. The best predictor of physical fatigue postoperatively and at follow-up was preoperative physical fatigue. Preoperative mental fatigue and negative mood were independent predictors of mental fatigue postoperatively and at follow-up. Preoperative fatigue also predicted worse subjective emotional and physical state after surgery. These results suggest that fatigue should be regarded as an aspect of emotional distress perioperatively and that complaints of fatigue postoperatively may reflect the tendency to complain of fatigue or negative mood preoperatively rather than being attributable to surgical trauma.