Patient Variables (patient + variable)

Distribution by Scientific Domains
Distribution within Medical Sciences


Selected Abstracts


Intratympanic Dexamethasone for Sudden Sensorineural Hearing Loss After Failure of Systemic Therapy

THE LARYNGOSCOPE, Issue 1 2007
David S. Haynes MD
Abstract Objective: Intratympanic steroids are increasingly used in the treatment of inner ear disorders, especially in patients with sudden sensorineural hearing loss (SNHL) who have failed systemic therapy. We reviewed our experience with intratympanic steroids in the treatment of patients with sudden SNHL to determine overall success, morbidity, and prognostic factors. Hypothesis: Intratympanic steroids have minimal morbidity and the potential to have a positive effect on hearing recovery in patients with sudden SNHL who have failed systemic therapy. Study Design: The authors conducted a retrospective review. Methods: Patients presenting with sudden SNHL defined as a rapid decline in hearing over 3 days or less affecting 3 or more frequencies by 30 dB or greater who underwent intratympanic steroids therapy (24 mg/mL dexamethasone) were reviewed. Excluded were patients with Meniere disease, retrocochlear disease, autoimmune HL, trauma, fluctuating HL, radiation-induced HL, noise-induced HL, or any other identifiable etiology for sudden HL. Patients who showed signs of fluctuation of hearing after injection were excluded. Pretreatment and posttreatment audiometric evaluations including pure-tone average (PTA) and speech reception threshold (SRT) were analyzed. Patient variables as they related to recovery were studied and included patient age, time to onset of therapy, status of the contralateral ear, presence of diabetes, severity of HL, and presence of associated symptoms (tinnitus, vertigo). A 20-dB gain in PTA or a 20% improvement in SDS was considered significant. Results: Forty patients fit the criteria for inclusion in the study. The mean age of the patients was 54.8 years with a range from 17 to 84 years of age. Overall, 40% (n = 16) showed any improvement in PTA or SDS. Fourteen (35%) men and 26 (65%) women were included. Using the criteria of 20-dB improvement in PTA or 20% improvement in SDS for success, 27.5% (n = 11) showed improvement. The mean number of days from onset of symptoms to intratympanic therapy was 40 days with a range of 7 days to 310 days. A statistically significant difference was noted in those patients who received earlier injection (P = .0008, rank sum test). No patient receiving intratympanic dexamethasone after 36 days recovered hearing using 20-dB PTA decrease or a 20% increase in discrimination as criteria for recovery. Twelve percent (n = 5) of patients in the study had diabetes with 20% recovering after intratympanic dexamethasone (not significantly different from nondiabetics at 28.6%, Fisher exact test, P = 1.0). Comparison to other studies that used differing steroid type, concentration, dosing schedule, inclusion criteria, and criteria for success revealed, in many instances, a similar overall recovery rate. Conclusions: Difficulty in proving efficacy of a single modality is present in all studies on SNHL secondary to multiple treatment protocols, variable rates of recovery, and a high rate of spontaneous recovery. Forty percent of patients showed some improvement in SDS or PTA after treatment failure. When criteria of 20-dB PTA or 20% is considered to define improvement, the recovery rate was 27.5%. Modest improvement is seen with the current protocol of a single intratympanic steroid injection of 24 mg/mL dexamethasone in patients who failed systemic therapy. Dramatic hearing recovery in treatment failures was rarely encountered. No patient showed significant benefit from intratympanic steroids after 36 days when using this protocol for idiopathic sudden SNHL. If patients injected after 6 weeks are excluded from the study, the improvement rate increases from 26.9% to 39.3%. Earlier intratympanic injection had a significant impact on hearing recovery, although with any therapeutic intervention for sudden SNHL, early success may be attributed to natural history. If we further exclude seven patients treated with intratympanic steroids within 2 weeks of the onset of symptoms (i.e., study only those patients treated with intratympanic dexamethasone between 2 and 6 weeks after onset of symptoms), still, 26% improved by 20 dB or 20% SDS. The recovery rates after initial systemic failure are higher than would be expected in this treatment failure group given our control group (9.1%) and literature review. These findings indicate a positive effect from steroid perfusion in this patient population. [source]


Assessment of Psychoeducational Outcomes After Pediatric Liver Transplant

AMERICAN JOURNAL OF TRANSPLANTATION, Issue 2 2009
S. Gilmour
Outcomes research in pediatric liver transplant (LT) has focused on mortality and morbidity but there is a need to also evaluate functional outcomes. Standardized cognitive testing was administered to a cohort of children with infantile chronic liver disease who were transplanted at the University of Alberta during their preschool years. Thirty children had comprehensive assessments with the Bayley Scales of Infant Development or Wechsler testing. Patient variables potentially associated with cognitive delay were analyzed with multiple regression analysis. The mean DQ/IQ score (developmental quotient/intelligence quotient) was 81 ± 17. Delay (DQ/IQ score < 70), and borderline delay (DQ/IQ 70,84) were each present in 27% of the cohort, with only 46% demonstrating normal cognition. Regression analysis demonstrated that the decreased IQ was associated with pretransplant growth retardation and elevated calcineurin inhibitor levels. Performance IQ had strong correlation with pretransplant growth retardation and elevated serum ammonia, R2= 45%, compared to verbal IQ that was associated was elevated calcineurin inhibitor levels, R2= 23%. Children post-LT are at high risk for cognitive delay or borderline delay. This is the first study to demonstrate the association calcineurin inhibitors with impaired IQ and also the unique finding of different variables predictive of impaired verbal intelligence quotient (VIQ) versus performance intelligence quotient (PIQ). [source]


Rate of bilirubin regression after stenting in malignant biliary obstruction for the initiation of chemotherapy

CANCER, Issue 11 2008
How soon should we repeat endoscopic retrograde cholangiopancreatography?
Abstract BACKGROUND. This study was conducted to evaluate the rate of regression of bilirubin after stent placement for malignant biliary obstruction. METHODS. Records were reviewed from October 2002 to September 2005 for patients who underwent endoscopic retrograde cholangiopancreatography with stent placement. The time to achieve a bilirubin level ,2 mg/dL was the primary endpoint because this is the level required by most chemotherapy protocols. Patient variables included type of cancer, liver metastasis, recent chemotherapy, baseline creatinine, and international normalized ratio (INR). Stent variables included type, dimension, stricture location, and sphincterotomy. RESULTS. In total, 156 patients were included in the analysis: Ninety-three patients achieved a poststent bilirubin level ,2 mg/dL, 29 patients failed because of stent failure, and 34 patients failed because of inadequate follow-up. The time required for 80% of patients to achieve normalization was more than doubled in those who had prestent bilirubin levels ,10 mg/dL (6 weeks) compared with those who had prestent bilirubin levels <10 mg/dL (3 weeks). The following variables were identified as statistically significant: prestent bilirubin level, stricture location, liver metastasis, and INR. The cancer type, recent chemotherapy, stent type and diameter, and sphincterotomy were not statistically significant variables. CONCLUSIONS. The rate of bilirubin normalization after biliary stenting was highly dependent on the prestent bilirubin level. Endoscopic intervention should be considered in patients who fail to achieve adequate normalization of serum bilirubin in 6 weeks if prestent bilirubin level was ,10 mg/dL and in 3 weeks if their prestent bilirubin level was <10 mg/dL. Independent variables, such as diffuse liver metastases, stricture outside the common bile duct, and elevated INR had predictive value for bilirubin normalization. Cancer 2008. © 2008 American Cancer Society. [source]


Treatment of scalp psoriasis with clobetasol-17 propionate 0.05% shampoo: a study on daily clinical practice

JOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY & VENEREOLOGY, Issue 4 2010
HJ Bovenschen
Abstract Background, Safety and clinical effectiveness of clobetasol-17 propionate 0.05% shampoo have been shown in patients with scalp psoriasis. Aim, First, to evaluate treatment satisfaction, user convenience safety and effectiveness of clobetasol-17 propionate 0.05% shampoo treatment in daily clinical practice. Second, to identify subgroup variables that may predict treatment success or failure. Methods, A total of 56 patients with scalp psoriasis were treated with short-contact clobetasol-17 propionate 0.05% shampoo once daily for 4 weeks. Data on treatment satisfaction, user convenience, safety and effectiveness were assessed on a 7-point Likert scale using postal questionnaires. Subgroup analyses were performed to identify variables that may predict treatment outcome. Results, A total of 41 patients returned both questionnaires (73%). Positive treatment satisfaction and user convenience were reported by 66% and 79% of patients respectively. Patient-rated indicators for disease severity improved by 39,46% (P < 0.05%). No major side-effects were reported. Subgroup analyses did not reveal any statistically significant patient variable that may predict treatment outcome. However, a tendency towards improved treatment satisfaction was observed in patients who had received fewer topical antipsoriatic treatments previously (P > 0.05). Conclusions, Short-contact treatment with clobetasol-17 propionate 0.05% shampoo has high user convenience and patient satisfaction rates. Moreover, the treatment is well-tolerated and efficacious from patients' perspective. Subgroup analyses did not reveal factors predicting treatment outcome, although treatment success tended to be more evident in patients who had received fewer treatments previously. [source]


Do family members interfere in the delivery of care when present during invasive paediatric procedures in the emergency department?

EMERGENCY MEDICINE AUSTRALASIA, Issue 3 2007
Glenn Ryan
Abstract Objective:, To determine whether family members interfere with patient care when present during invasive procedures performed on their children in the ED. Methods:, A prospective observational study of consecutive cases of procedural sedation of children aged between 12 months and 16 years was conducted between March 2002 and March 2006 in the ED of a secondary-level regional hospital in south-east Queensland. Procedures performed included laceration repair, fracture reduction, foreign body removal and abscess incision and drainage. Parents/primary caregivers were encouraged to stay with their child. A stepwise explanation of the procedure and sedation to be used was undertaken, informed consent obtained and telephone follow up attempted 5,14 days post procedure. Results:, Six hundred and fifty-two patient encounters with parents or primary caregivers present for the procedure were included for a total of 656 procedures: 234 laceration repairs, 250 fracture reductions, 85 foreign body removals, 33 abscess incision and drainages, 14 dislocation reductions and 40 other procedures. Telephone follow up was successful in 65% (424) of cases. The mean age was 6.5 years. Family member interference occurred in one case (0.15%, 95% confidence interval 0,0.73%). In 17 cases (2.68%, 95% confidence interval 2.1,5.9%) family members present expressed concerns about the procedure during the telephone follow up but had not interfered at the time of the procedure. There were no significant differences between the concerned parents at follow up and the study group across key patient variables such as child's age (P = 0.369), weight (P = 0.379), respiratory rate (P = 0.477), sex (P = 0.308), procedure indication (P = 0.308) and airway manoeuvres (P = 0.153). Conclusion:, When family members are encouraged to stay for invasive procedures performed on their child, and careful explanation of the procedure, sedation, possible complications, choice of medication for sedation and possible side-effects is undertaken, family member interference is extremely rare. [source]


The use of fall prevention guidelines in German hospitals , a multilevel analysis

JOURNAL OF EVALUATION IN CLINICAL PRACTICE, Issue 3 2010
Kathrin Raeder MA RN
Abstract Aims, Falls and fall-related injuries are major problems in hospitals. The aim of this study was to examine the impact of fall prevention guidelines on falls and fall-related injuries in hospitals. Method, A cross-sectional study was conducted in German hospitals. Some 28 hospitals participated with a total of 5046 patients. Eleven of these hospitals had already implemented a fall prevention guideline, 10 were in the process of developing such a guideline and seven hospitals were not using any fall prevention guideline at all. A standardized questionnaire was used on the individual patient level to obtain details regarding the socio-demographic background, falls, fall-related injuries and other problems relevant to nursing. A further questionnaire referred to the use of fall prevention guidelines in the individual hospitals. Data specific to falls were analysed both on hospital level and on ward and patient level by means of a multilevel logistic model. Results, The univariate analyses suggest that patients in hospitals that are using guidelines are more likely to fall [odds ratios (OR) = 1.19, confidential interval (CI) = 0.65,2.18] than in hospitals that do not use any guideline (reference category) or are still in the developing stage (OR = 0.82, KI = 0.77,0.87). If, in a multivariate analysis, the ward level and individual patient variables (age, disorientation, confusion, incontinence) are included, the following results are obtained: the probability of falls in hospitals not using guidelines (reference category) is higher than in hospitals developing a guideline (OR = 0.86, KI = 0.58,1.28) or using a guideline (OR = 0.71, KI = 0.44,1.14). The differences are even more distinct regarding the injuries resulting from a fall that require medical treatment. The probability of these injuries is significantly lower in hospitals using guidelines (OR = 0.27, KI = 0.09,0.85) than in hospitals developing a guideline (OR = 0.61, KI = 0.24,1.54) or not using any guidelines at all (reference category). Conclusion, The present results of the multilevel analysis show that falls and fall-related injuries can be reduced by the implementation of fall prevention guidelines. [source]


Predictors of Clinical Outcome Following NIR Stent Implantation for Coronary Artery Disease: Analysis of the Results of the First International New Intravascular Rigid-Flex Endovascular Stent Study (FINESS Trial)

JOURNAL OF INTERVENTIONAL CARDIOLOGY, Issue 1 2002
STEVEN FELD M.D.
Background: Patient and procedural characteristics associated with major adverse cardiac events following balloon angioplasty have been identified. Factors predictive of angiographic restenosis following coronary stent implantation have been reported, although patient variables associated with adverse clinical outcome are not well defined. Hypothesis and Methods: To identify predictors of adverse clinical outcome following NIR stent implantation, clinical and angiographic characteristics of patients enrolled in the FINESS Trial were subjected to stepwise logistic regression analysis. From December 1995 through March 1996, NIR stent implantation was attempted in 255 patients (341 lesions) enrolled prospectively in a multicenter registry with broad entry criteria. Results: On stepwise logistic regression analysis, the presence of multivessel disease, diabetes, and the total length of the stented segment were predictive of major adverse cardiac events during 6-month follow-up. For every 1 mm increase in stent length, the risk for the combined end point of death or myocardial infarction increased by 3%. Lesion length was not predictive of clinical events on multivariate analysis. Conclusions: Our data raise the possibility that an attempt to use shorter stents to cover significant stenoses, but not adjacent areas of visible narrowing, may improve outcome. [source]


Policy on Acute Toxic Ingestion or Dermal or Inhalation Exposure

JOURNAL OF THE AMERICAN ACADEMY OF NURSE PRACTITIONERS, Issue 7 2003
ANP-C FAANP, Mary Jo Goolsby EdD
ABSTRACT Many nurse practitioners (NPs) practice in emergency and urgent-care settings, and fir more practical remote settings. NPs in each of these settings should be familiar with the assessment, stabilization, and treatment of patients who seek treatment for suspected intentional or accidental poisoning. This month's Clinical practice guideline (CPG) column reviews the "Clinical Policy for the Initial Approach to Patients Presenting With Acute Toxic Ingestion or Dermal or Inhalation Exposure." SUMMARY The ACEP "Clinical Policy for the Initial Approach to Patients Presenting With Acute Toxic Ingestion or Dermal or Inhalation Exposure" includes several helpful resources. In addition to recommending specific clinical actions in response to patient variables, the document includes a table identifying the antidote for many of the most commonly ingested drugs. These include digoxin, iron, opioids, salicylates, acetaminophen, and tricyclic antidepressants. The table also includes both the adult and pediatric dose of each listed antidote. A quick reference is included. This form can be used to guide the history, physical examination, and subsequent actions for treating patients with acute toxic ingestion or dermal or inhalation exposure. Finally, there is a quality assurance form to guide chart reviews. Many of the attributes of a well-developed guideline are identified in the report. The authors clearly identify the situations for which the recommendations are intended as well as those in which they do not apply. For instance, the guidance is not intended for use when patients are unstable and stabilization is the primary focus. It is also not intended for cases of radiation, parenteral, or eye exposure or of food poisoning. The authors describe the process used to develop the recommendations and identify the strength of the evidence on which each recommendation is based. The role of provider judgment in application of the guidance is addressed. Prior to its dissemination, the CPG was subjected to external review by dinical experts. This ACEP policy has applicability for the growing number of NPs working in emergency and urgent cafe settings as well as for those who must provide front line emergency care in remote settings. It provides a framework for responding to acute toxic exposures and provides several useful resources to assist the clinician in responding to situations in which accidental or intentional poisoning is suspected. [source]


Treatment of Dogs with Lymphoma Using a 12-Week, Maintenance-Free Combination Chemotherapy Protocol

JOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 4 2006
D. Simon
Background: Treatment of lymphoma in dogs by long-term chemotherapy has favorable results. However, the efficacy of short-term, maintenance-free treatment protocols on remission and survival times in dogs has not been determined. Hypothesis: That treatment using a 12-week chemotherapy protocol would be associated with satisfactory treatment outcome in dogs with lymphoma. Animals: 77 dogs with histologically or cytologically confirmed diagnosis of lymphoma. Methods: Prospective clinical trial in which dogs were treated with a 12-week chemotherapy protocol consisting of L-asparaginase, vincristine, cyclophosphamide, doxorubicin, and prednisolone. Results: Complete remission rate was 76.3%. Multivariate logistic regression analysis revealed that clinical substage (P= .006) and immunophenotype (P= .003) had a significant influence on the likelihood of a dog achieving complete remission. Median duration of first complete remission was 243 days (range 19,1, 191 days). The 6-month, 1-year, and 2-year remission rates were 68%, 28%, and 16%, respectively. In the multivariate analysis of patient variables, immunophenotype (P= .022) revealed a significant influence on first remission duration. Toxicosis was mild with the exception of 1 treatment-associated death. Conclusions and Clinical Importance: In this group of dogs the 12-week maintenance-free chemotherapy protocol was well tolerated and had satisfactory results. [source]


Canine Digital Tumors: A Veterinary Cooperative Oncology Group Retrospective Study of 64 Dogs

JOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 5 2005
Carolyn J. Henry
We compared clinical characteristics and outcomes for dogs with various digital tumors. Medical records and histology specimens of affected dogs from 9 veterinary institutions were reviewed. Risk factors examined included age, weight, sex, tumor site (hindlimb or forelimb), local tumor (T) stage, metastases, tumor type, and treatment modality. The Kaplan-Meier product limit method was used to determine the effect of postulated risk factors on local disease-free interval (LDFI), metastasis-free interval (MFI), and survival time (ST). Outcomes were thought to differ significantly between groups when P± .003. Sixty-four dogs were included. Squamous cell carcinoma (SCC) accounted for 33 (51.6%) of the tumors. Three dogs presented with or developed multiple digital SCC. Other diagnoses included malignant melanoma (MM) (n = 10; 15.6%), osteosarcoma (OSA) (n = 4; 6.3%), hemangiopericytoma (n = 3; 4.7%), benign soft tissue tumors (n = 5; 7.8%), and malignant soft tissue tumors (n = 9; 14%). Fourteen dogs with malignancies had black hair coats, including 5 of the 10 dogs with MM. Surgery was the most common treatment and, regardless of the procedure, had a positive impact on survival. None of the patient variables assessed, including age, sex, tumor type, site, and stage, had a significant impact on ST. Both LDFI and MFI were negatively affected by higher T stage, but not by type of malignancy. Although metastasis at diagnosis correlated with a shorter LDFI, it did not have a significant impact on ST On the basis of these findings, early surgical intervention is advised for the treatment of dogs with digital tumors, regardless of tumor type or the presence of metastatic disease. [source]


An audit of post-operative nausea and vomiting, following cardiac surgery: scope of the problem

NURSING IN CRITICAL CARE, Issue 5 2003
Lisa Mace
Summary , Post-operative nausea and vomiting is a major problem for patients following cardiac surgery , The literature in this area identifies that there are a number of individual patient and post-operative factors which increase the risk of post-operative nausea and vomiting, including female gender, non-smoker, age, use of opioids, pain and anxiety , An audit involving 200 patients, who had undergone cardiac surgery was implemented to assess/evaluate the incidence of nausea and vomiting for this patient group , Data collected included information relating to nausea and vomiting, pain, consumption of morphine and other individual patient variables , The results suggest that nausea and vomiting, is experienced by a large number of patients after cardiac surgery (67%), with the majority suffering on the first day after surgery. The duration of nausea and vomiting for most is short, but for a significant number (7%) it can last up to one-quarter of their initial post-operative course , The paper discusses key implications for practice arising from this project [source]


The relative importance of specific risk factors for insomnia in women treated for early-stage breast cancer

PSYCHO-ONCOLOGY, Issue 1 2008
Wayne A. Bardwell
Abstract Background: Many individual risk factors for insomnia have been identified for women with a history of breast cancer. We assessed the relative importance of a wide range of risk factors for insomnia in this population. Methods: Two thousand six hundred and forty-five women ,4 years post-treatment for Stage I (,1 cm),IIIA breast cancer provided data on cancer-related variables, personal characteristics, health behaviors, physical health/symptoms, psychosocial variables, and the Women's Health Initiative-Insomnia Rating Scale (WHI-IRS; scores ,9 indicate clinically significant insomnia). Results: Thirty-nine per cent had elevated WHI-IRS scores. In binary logistic regression, the variance in high/low insomnia group status accounted for by each risk factor category was: cancer-specific variables, 0.4% (n.s.); personal characteristics, 0.9% (n.s.); health behaviors, 0.6% (n.s.); physical health/symptoms, 13.4% (p<0.001); and, psychosocial factors, 11.4% (p<0.001). Insomnia was associated with worse depressive (OR = 1.32) and vasomotor symptoms (particularly night sweats) (OR = 1.57). Conclusion: Various cancer-specific, demographic, health behavior, physical health, and psychosocial factors have been previously reported as risk factors for insomnia in breast cancer. In our study (which was powered for simultaneous examination of a variety of variables), cancer-specific, health behavior, and other patient variables were not significant risk factors when in the presence of physical health and psychosocial variables. Only worse depressive and vasomotor symptoms were meaningful predictors. Copyright © 2007 John Wiley & Sons, Ltd. [source]


Individual differences in the experience of burden in caring for relatives with dementia: role of personality and mastery

AUSTRALASIAN JOURNAL ON AGEING, Issue 4 2005
Edward Helmes
Objective:,We explored individual differences in caregiver outcome according to the personality and behavioural style of the carer. Current models of caregiver burden fail to consider such factors. Methods:,This cross-sectional, exploratory study used carer variables of personality traits and mastery and patient variables of cognitive, functional and neurobehavioural status to predict scores on an established measure of burden in a sample of 51 people with dementia and their carers. Results:,Hierarchical multiple regression showed a significant association between behavioural disturbance and neuroticism and burden, but not with mastery. Conclusions:,The primary findings in this study are that models of caregiver outcome need to take an individual differences perspective in accounting for caregiver mental health risk factors: personality characteristics do play a part in the way caregivers manage this difficult role. [source]


Defining the length of stay following percutaneous coronary intervention,

CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS, Issue 7 2009
An expert consensus document from the society for cardiovascular angiography, interventions endorsed by the American college of cardiology foundation
Abstract Percutaneous coronary intervention (PCI) is the most common method of coronary revascularization. Over time, as operator skills and technical advances have improved procedural outcomes, the length of stay (LOS) has decreased. However, standardization in the definition of LOS following PCI has been challenging due to significant physician, procedural, and patient variables. Given the increased focus on both patient safety as well as the cost of medical care, system process issues are a concern and provide a driving force for standardization while simultaneously maintaining the quality of patient care. This document: (1) provides a summary of the existing published data on same-day patient discharge following PCI, (2) reviews studies that developed methods to predict risk following PCI, and (3) provides clarification of the terms used to define care settings following PCI. In addition, a decision matrix is proposed for the care of patients following PCI. It is intended to provide both the interventional cardiologist as well as the facilities, in which they are associated, a guide to allow for the appropriate LOS for the appropriate patient who could be considered for early discharge or outpatient intervention. © 2009 Wiley-Liss, Inc. [source]


CMS oversight, OPOs and transplant centers and the law of unintended consequences

CLINICAL TRANSPLANTATION, Issue 6 2009
Richard J. Howard
Abstract:, The Health Resources and Services Administration launched collaboratives with the goals of increasing donation rates, increasing the number of organs transplanted, eliminating deaths on the waiting list and improving outcomes. The Center for Medicare and Medicaid Services (CMS) recently published requirements for organ procurement organizations (OPOs) and transplant centers. Failure to meet CMS performance measures could result in OPOs losing their service area or transplant centers losing their CMS certification. CMS uses analyses by the Scientific Registry of Transplant Recipients (SRTR) to evaluate a transplant center's performance based on risk-adjusted outcomes. However, CMS also uses a more liberal (one-sided) statistical test rendering more centers likely to qualify as low performing. Furthermore, the SRTR model does not incorporate some important patient variables in its statistical model which may result in biased determinations of quality of care. Cumulatively, there is much unexplained variation for transplant outcomes as suggested by the low predictive ability of survival models compared to other disease contexts. OPOs and transplant centers are unlikely to quietly accept their elimination. They may take certain steps that can result in exclusion of candidates who might otherwise benefit from transplantation and/or result in fewer transplants through restricted use of organs thought to carry higher risk of failure. CMS should join with transplant organizations to ensure that the goals of the collaborative are not inhibited by their performance measures. [source]