Regional Differences in Nonadherence to Dialysis Among Southern Dialysis Patients: A Comparative Cross-Sectional Study to the Dialysis Outcomes and Practice Patterns Study

African Americans' Hemodialysis Treatment Adherence Data Assessment and Presentation: A Precision-Based Paradigm Shift to Support Quality Improvement Activities

RATIONALE & OBJECTIVE

Thrice-weekly hemodialysis can result in adequate urea clearance; however, the morbidity and mortality rates of patients treated with maintenance dialysis remain unacceptably high, partly because of nonadherence. African Americans have a higher prevalence of kidney failure treated with dialysis, greater dialysis nonadherence, and higher odds of hospitalization. We hypothesized that more precise ways of assessing dialysis treatment adherence will reflect the severity of nonadherence, distinguish patterns of nonadherence, and inform the design of personalized behavioral interventions.

STUDY DESIGN

Retrospective cohort study.

SETTING & PARTICIPANTS

African American patients receiving hemodialysis for >90 days.

EXPOSURE

Hemodialysis.

OUTCOME

Dialysis adherence.

ANALYTICAL APPROACH

Dialysis attendance data were displayed using a dot plot, categorized based on missed and shortened treatments, and examined for patterns. Descriptive characteristics were reported. In an exploratory analysis, associations between dialysis treatment adherence and participant characteristics were evaluated using ordinary least squares regression. An analysis was performed using missed minutes of dialysis and current metrics for measuring dialysis treatment adherence (ie, missed and shortened treatments).

RESULTS

Among 113 African American patients treated with dialysis, 47% were men; the median age was 57 years (interquartile range, 46-70 years), and the median dialysis vintage was 54 months (interquartile range, 22-90 months). With rows ordered based on the total missed minutes of dialysis, the dot plot displayed a decreasing gradient in the severity of nonadherence, with novel dialysis treatment adherence categories termed as follows: consistent underdialysis, inconsistent dialysis, and consistent dialysis. Distinct patterns of nonadherence and heterogeneity emerged within these categories. Older age was consistently associated with better adherence, as determined by the analyses performed using the total missed minutes of dialysis as well as missed and shortened treatments.

LIMITATIONS

The study findings, although replicable and paradigm-shifting, might be limited by the short timeline, focus on adherence data specific to African American patients treated with dialysis, and restriction to dialysis units affiliated with 1 academic center.

CONCLUSIONS

This study presents more precise and novel ways of measuring and displaying dialysis treatment adherence. The findings introduce a more personalized approach for evaluating actual dialysis uptake. Identification of unique patterns of adherence behavior is important to inform the design of effective behavioral interventions and improve outcomes for vulnerable African American patients treated with dialysis.

Patient safety culture and nurse-reported adverse events in outpatient hemodialysis units

AIMS

Patient safety culture is an important quality indicator in health care facilities and has been associated with key patient outcomes in hospitals. The purpose of this analysis was to examine relationships between patient safety culture and nurse-reported adverse patient events in outpatient hemodialysis facilities.

METHODS

A cross-sectional correlational, mailed survey design was used. The analytic sample consisted of 422 registered nurses who worked in outpatient dialysis facilities in the United States. The Handoff and Transitions and the Overall Patient Safety Grade scales of the Agency for Healthcare Research and Quality's (AHRQ) Hospital Patient on Safety Survey were modified and used to measure patient safety culture in outpatient dialysis facilities. Nurse-reported adverse patient events was measured as a series of questions designed to capture the frequency with which nurses report that 13 adverse events occur in the outpatient dialysis facility setting.

RESULTS

Handoff and transitions safety during patient shift change in dialysis centers was perceived negatively by a majority of nurses. On the other hand, a majority of nurses rated the overall patient safety culture in their dialysis facility as good to excellent. All relationships between patient safety culture items and adverse patient events were in the expected direction. Negative ratings of handoffs and transitions safety were independently associated with increased odds of frequent occurrences of vascular access thrombosis and patient complaints. Negative ratings of overall patient safety culture in dialysis units were independently associated with increased odds of frequent occurrences of medication errors by nurses, patient hospitalization, vascular access infection, and patient complaints.

CONCLUSION

Findings from this analysis indicate that a positive patient safety culture is an important antecedent for optimal patient outcomes in ambulatory care settings.

Relationships of clinic size, geographic region, and race/ethnicity to the frequency of missed/shortened dialysis treatments

BACKGROUND

Significant international differences abound in the adherence of hemodialysis (HD) patients to prescribed treatments. Unfortunately, factors influencing adherence within the United States (US) are not well understood. This study explores the hypothesis that race/ethnicity, geographic region and clinic size are associated with differences in the frequency of missed/shortened treatments.

METHODS

A retrospective analysis on all prevalent chronic HD patients treated at Dialysis Clinics Inc. facilities between January 2007 and June 2008. Logistic regression models were computed in which the outcome measures were the odds for missing or shortening treatments.

RESULTS

The cohort consisted of 15,340 HD patients of whom 48% were non-Hispanic whites (NHW), 41% African Americans (AA), 6% Hispanics, 2% Native Americans, 2% Asians, and 1% unknown. Patients were older in the Northeast than in the South (p < 0.001) or West (p = 0.0052). The frequency of missed and shortened treatments was lower in the Northeast than other regions, p < 0.0001. Hospitalization rates were lower in the West than the Northeast (p < 0.01) but mortality rates were similar across all regions. The odds ratio and 95% confidence interval for missed [1.31 (1.14-1.52)] and shortened treatments [1.86 (1.73-2.0)] were greater in clinics with >100 patients than in those with <50 patients. Compared to NHW, the frequencies of missed and shortened treatments were higher in AA, Hispanics and Native Americans (p < 0.001) but lower among Asians (p < 0.001).

CONCLUSION

The frequency of missed and shortened HD varies significantly by race/ethnicity, geographic region and clinic size. The relationship of clinic size to missed/shortened treatments may warrant consideration when planning new HD facilities.

Variation in dialysis quality measures by facility, neighborhood, and region

BACKGROUND

We examined whether dialysis facility characteristics, neighborhood demographics, and region are associated with Centers for Medicare and Medicaid Services (CMS) dialysis facility quality measures in order to determine the most important targets for intervention.

METHODS

We linked US census data to the CMS Dialysis Compare File which contains information for facility outcomes for all CMS-certified dialysis facilities in 2007 (n=5616). We then used linear and logistic regression to characterize the association between dialysis facility quality--worse than expected patient survival, and the proportion of individuals in a facility achieving dialysis adequacy (urea reduction rate >65) or target hemoglobin (10<Hgb<12 g/dL)--and dialysis facility characteristics, neighborhood demographics, and region.

RESULTS

Only an increasing proportion of African Americans in the neighborhood is consistently associated with worse dialysis facility outcomes, even after controlling for neighborhood poverty. Facilities with the highest proportion of African Americans in the neighborhood had worse patient survival [odds ratio (OR) 4.6; 95% confidence interval (CI), 2.8-7.6], were less likely to have adequate dialysis (β -1.4; 95% CI, -2.3 to -0.6), and achieve targeted hemoglobin (β -3.1; 95% CI, -4.7 to -1.6) compared to those with the lowest proportion. No other predictor-facility, neighborhood, or region--was consistently associated with dialysis facility quality.

CONCLUSIONS

The proportion of African Americans in the dialysis facility neighborhood is strongly and consistently associated with lower facility quality. Quality improvement efforts are particularly needed for dialysis facilities in minority communities.

Adequacy of dialysis clinic staffing and quality of care: a review of evidence and areas of needed research

Improving the quality of care delivered to patients receiving in-center dialysis treatment remains a perpetual concern with stakeholders. Quality indicators traditionally have focused on such items as adequacy of dialysis, anemia management, patient survival, and, most recently, the percentage using arteriovenous fistulas. Largely overlooked in the quest for improvement has been adequate consideration of dialysis clinic staffing levels. Staffing is important because it has been identified as a structural measure of quality. With 326,671 (93.1%) of all dialysis patients receiving in-center treatments, this is a potentially critical issue. This article reviews evidence related to inadequacies in clinic staffing and how they may be contributing to suboptimal care and outcomes. Focusing on nephrologists, nurses, patient care technicians, dietitians, and social workers, this article suggests areas of needed research.