The opportunities and shortcomings of using big data and national databases for sarcoma research

The rarity and heterogeneity of sarcomas make performing appropriately powered studies challenging and magnify the significance of large databases in sarcoma research. Established large tumor registries and population-based databases have become increasingly relevant for answering clinical questions regarding sarcoma incidence, treatment patterns, and outcomes. However, the validity of large databases has been questioned and scrutinized because of the inaccuracy and wide variability of coding practices and the absence of clinically relevant variables. In addition, the utilization of large databases for the study of rare cancers such as sarcoma may be particularly challenging because of the known limitations of administrative data and poor overall data quality. Currently, there are several large national cancer databases, including the Surveillance, Epidemiology, and End Results database, the National Cancer Data Base of the American College of Surgeons and the American Cancer Society, and the National Program of Cancer Registries of the Centers for Disease Control and Prevention. These databases are often used for sarcoma research, but they are limited by their dependence on administrative or billing data, the lack of agreement between chart abstractors on diagnosis codes, and the use of preexisting documented hospital diagnosis codes for tumor registries, which lead to a significant underestimation of sarcomas in large data sets. Current and future initiatives to improve databases and big data applications for sarcoma research include increasing the utilization of sarcoma-specific registries and encouraging national initiatives to expand on real-world, evidence-based data sets.

Comparison of Hospital Readmission After Total Hip and Total Knee Arthroplasty vs Spinal Surgery After Implementation of the Hospital Readmissions Reduction Program

IMPORTANCE

The Hospital Readmissions Reduction Program (HRRP) was recently expanded to penalize excessive readmissions after total hip arthroplasty (THA) and total knee arthroplasty (TKA). These are the first surgical procedures to be included in the HRRP.

OBJECTIVE

To determine whether the HRRP was associated with a greater decrease in readmissions after targeted procedures (THA and TKA) compared with similar nontargeted procedures (lumbar spine fusion and laminectomy).

DESIGN, SETTING, AND PARTICIPANTS

A retrospective cohort study was conducted of patients 50 years or older among all payers in the Nationwide Readmissions Database who underwent THA, TKA, lumbar spine fusion, or laminectomy between January 1, 2010, and September 30, 2015. Multivariable logistic regression and interrupted time-series models were used to calculate and compare 30-day readmission trends in 3 periods associated with the HRRP: preimplementation (January 2010-September 2012), implementation (October 2012-September 2014), and penalty (October 2014-September 2015). Statistical analysis was performed from January 1, 2010, to September 30, 2015.

EXPOSURES

Announcement and implementation of the HRRP.

MAIN OUTCOMES AND MEASURES

Readmission within 30 days after hospitalization for THA, TKA, lumbar spine fusion, or laminectomy surgery.

RESULTS

The study included 6 687 077 (58.3% women and 41.7% men; mean age, 66.7 years; 95% CI, 66.7-66.8 years) weighted hospitalizations for THA, TKA, lumbar spine fusion, and laminectomy surgery: 4 765 466 hospitalizations for targeted conditions and 1 921 611 for nontargeted conditions. After passage of the Patient Protection and Affordable Care Act, the risk-adjusted rates of readmission after all procedures decreased in a similar fashion. Implementation of the HRRP was associated with a 0.018% per month decrease in the rate of readmission (95% CI, -0.025% to -0.010%) after targeted procedures, which was not observed after nontargeted procedures (slope per month, -0.003%; 95% CI, -0.016% to 0.010%). Penalties were not associated with a greater decrease in readmission for either targeted or nontargeted procedures.

CONCLUSIONS AND RELEVANCE

These results appear to be consistent with hospitals responding to the future possibility of penalties by reducing readmissions after surgical procedures targeted by the HRRP.

Recommended Cancer Screening in Accountable Care Organizations: Trends in Colonoscopy and Mammography in the Medicare Shared Savings Program

PURPOSE

Accountable care organizations (ACOs) are a delivery and payment model designed to encourage integrated, high-value care. We designed a study to test the association between ACOs and two recommended cancer screening tests, colonoscopy for colorectal cancer and mammography for breast cancer.

METHODS

Using the random 20% sample of Medicare claims, beneficiaries were attributed to ACO or non-ACO cohorts on the basis of providers' enrollment in the Medicare Shared Savings Program. An inverse probability of treatment weighting was used to balance patient characteristics between ACO and non-ACO cohorts. A propensity score-weighted, difference-in-differences analysis was then performed using the same provider groups in 2010-pre-ACO-as a baseline. A secondary analysis for older-nonrecommended-age ranges was performed.

RESULTS

Prevalence of colonoscopy in recommended age ranges in ACOs from 2010 to 2014 increased from 15.3% (95% CI, 14.9% to 15.6%) to 17.9% (95% CI, 17.3% to 18.5%). This differed significantly from the change in non-ACOs (difference in differences, 1.2%; P < .001). Among women in ACOs, mammography prevalence rose from 53.7% (95% CI, 53.0% to 54.4%) to 54.9% (95% CI, 54.2% to 55.7%). In contrast to colonoscopy, the difference in mammography prevalence was not significantly different in ACO versus non-ACOs (difference in differences, 0.49%; P < .13). A similar pattern was also observed in older-nonrecommended-age ranges with significant difference in differences (ACO v non-ACO) in colonoscopy, but not mammography.

CONCLUSION

The impact of ACOs on cancer screening varies between screening tests. Our results are consistent with a greater effect of ACOs on high-cost, high-complexity screening services, which may be more sensitive to integrated care delivery models.

It still hurts! Persistent pain and use of pain medication one year after injury

BACKGROUND

Given the scarce literature data on chronic post-traumatic pain, we aim to identify early predictors of long-term pain and pain medication use after major trauma.

METHODS

Major trauma patients (Injury Severity Score ≥ 9) from three Level I Trauma Centers at 12 months after injury were interviewed for daily pain using the Trauma Quality of Life questionnaire. Multivariate logistic regression models identified patient- and injury-related independent predictors of pain and use of pain medication.

RESULTS

Of 1238 patients, 612 patients (49%) felt daily pain and 300 patients (24%) used pain medication 1 year after injury. Of a total of 8 independent predictors for chronic pain and 9 independent predictors for daily pain medication, 4 were common (pre-injury alcohol use, pre-injury drug use, hospital stay ≥ 5 days, and education limited to high school). Combinations of independent predictors yielded weak predictability for both outcomes, ranging from 20% to 72%.

CONCLUSIONS

One year after injury, approximately half of trauma patients report daily pain and one-fourth use daily pain medication. These outcomes are hard to predict.

Abstract P5-13-13: Non-clinical drivers of variation in preoperative MRI utilization for breast cancer

Background: Preoperative MRI utilization in breast cancer treatment has increased significantly over the past two decades but its use continues to have inter-provider variability and disputed clinical indications. The objective of this study was to evaluate non-clinical factors associated with preoperative breast MRI utilization.

Methods: This study utilized claims from the Military Health System Data Repository (MDR) on TRICARE Prime beneficiaries, from fiscal years 2006-2015. TRICARE provides health benefits for Active Duty service members, retirees, and their dependents at both military (direct care with salaried physicians) and civilian (purchased care with fee-for-service physicians) treatment facilities. We studied patients aged 25-64 years old with a breast cancer diagnosis who had undergone mammogram/breast ultrasound alone or with subsequent breast MRI prior to surgery. Patient demographics and treatment characteristics were abstracted from the data. The National Center for Health Statistics (NCHS) urban-rural classification was used to determine the urbanization level of the treatment facility. Adjusted multivariate logistic regression tests were used to identify independent factors associated with preoperative breast MRI utilization.

Results: Of the 25,656 identified patients, 64.4% of patients (n=16,511) received preoperative mammogram/breast ultrasound alone while 35.6% of patients (n=9,145) underwent additional MRI after mammographic and/or ultrasound imaging. On multivariable analysis, younger age, presence of two or more comorbidities, active duty or retired beneficiary category, officer rank (surrogate for socioeconomic status), Air Force service branch, metropolitan location, and purchased care were associated with increased likelihood of preoperative MRI utilization. Nonmetropolitan location and Navy service branch were associated with decreased MRI use.

  Odds Ratio95% Confidence IntervalAge Group (Ref: 55-64 years)25-34 years1.851.60-2.15 35-44 years1.591.47-1.72 45-54 years1.271.19-1.35Charlson Comorbidity Index (Ref 0-1)2+2.472.33-2.61Beneficiary Category (Ref: Dependent)Active Duty1.201.04-1.38 Retired1.231.09-1.40Rank (Ref: Senior Enlisted)Junior Enlisted0.930.78-1.11 Junior Officer1.251.14-1.37 Senior Officer1.481.36-1.60 Warrant Officer1.231.06-1.42Service Branch (Ref: Army)Air Force1.101.03-1.18 Navy0.920.85-0.99 Marines0.950.84-1.07 Coast Guard1.070.89-1.29Urban-Rural Classification (Ref: Medium Metropolitan)Large Central Metropolitan1.801.68-1.93 Large Fringe Metropolitan1.591.47-1.71 Small Metropolitan0.650.59-0.71 Micropolitan0.400.34-0.46 Noncore0.250.18-0.34Treatment Facility Care Setting (Ref: Direct Care)Purchased Care1.601.48-1.73

Conclusions: After controlling for expected clinical risk factors, patients were more likely to receive additional MRI when treated at larger metropolitan facilities or through the purchased, fee-for-service system. Both associations may point toward non-clinical incentives to perform MRI in the treatment of breast cancer.

Citation Format: Pak LM, Banaag A, Koehlmoos TP, Haider AH, Learn PA. Non-clinical drivers of variation in preoperative MRI utilization for breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-13-13.

Collecting sexual orientation and gender identity information in the emergency department : the divide between patient and provider perspectives

Background

In the USA, The Joint Commission and Institute of Medicine have called for collection of patient sexual orientation (SO) and gender identity (GI) information in healthcare. In a recent study, we reported that ED clinicians believe patients will refuse to provide this information; however, very few patients say they would refuse to provide SO/GI. As part of this study, we interviewed patients and providers regarding the importance of collecting this information. While these interviews were briefly summarised in our prior report, the qualitative data warranted a more thorough analysis and exposition to explore provider and patient views as well as risks and benefits of collecting SO/GI.

Methods

A purposive sample of 79 participants was recruited for semi-structured interviews between August 2014 and January 2015. Participants included community members who had a previous ED encounter and ED providers from 3 community and 2 academic centres in a major US metropolitan area. Interviews were conducted one-on-one in person, audio-recorded and transcribed verbatim. Data were analysed using the constant comparative method.

Results

Fifty-three patients and 26 ED providers participated. Patients perceived collection of SO/GI to be important in most clinical circumstances because SO/GI is relevant to their identity and allows providers to treat the whole person. However, many providers felt SO/GI was not relevant in most clinical circumstances because similar care is provided to all patients regardless of SO/GI. Patients and providers agreed there are risks associated with collecting SO/GI in the ED.

Conclusions

ED clinicians do not perceive routine collection of SO/GI to be medically relevant in most circumstances. However, patients feel routine SO/GI collection allows for recognition of individual identity and improved therapeutic relationships in the ED. These discordant perspectives may be hindering patient-centred care, especially for sexual and gender minority patients.

Hemorrhage Control Training Promotes Resilience-Associated Traits in Medical Students

OBJECTIVE

Given rising rates of physician burnout, the potential for clinical skills training programs to develop and reinforce resilience-associated traits in medical students warrants investigation. The primary objective of this study was to examine the impact of a hemorrhage control training program on resilience-associated traits (role-clarity, self-efficacy, and empowerment) in medical students. A secondary objective was to examine the differential impact of additional hands-on skills training.

DESIGN

This was a prospective study of medical students participating in an established hemorrhage control training program, utilizing pre-, mid-, and post-training questionnaires. The program included both an in-person lecture and hands-on skills training. Primary endpoints were self-reported increases in role clarity (when the hemorrhage control skills would and would not be applicable), self-efficacy (confidence in ability to use the skill), and empowerment (to act in a situation where the skill was needed).

SETTING

Harvard Medical School, Boston, Massachusetts.

PARTICIPANTS

One hundred and twenty-six Harvard Medical School students participated.

RESULTS

There was a significant increase at each stage of training in self-reported role clarity about when to apply hemorrhage control skills (p < 0.01) and when not to apply them (p < 0.01); confidence in application of the skill (p < 0.01); as well as empowerment to apply the skill when appropriate (p < 0.01).

CONCLUSIONS

Hemorrhage control training, a first response-related clinical skills program, is a promising domain for development and reinforcement of resilience-associated traits in medical students, particularly when the program includes hands-on skills training. Providing experiential learning opportunities that are designed not only for skills-specific outcomes, but also to reinforce such resilience-associated traits as role-clarity, self-efficacy, and empowerment provides an essential integrated perspective.

Can they stop the bleed? Evaluation of tourniquet application by individuals with varying levels of prior self-reported training

BACKGROUND

Application of extremity tourniquets is a central tenet of multiple national initiatives to empower laypersons to provide hemorrhage control (HC). However, the efficacy of the general population who self-report prior first-aid (FA) or HC training on individual's ability to control bleeding with a tourniquet remains unknown. Therefore, the objective of this study was to assess the effectiveness of laypeople with self-reported prior FA or HC training to control bleeding with a tourniquet.

STUDY DESIGN

Employees of a stadium were assessed via simulation in their ability to apply a Combat Application Tourniquet. As a subgroup analysis of a larger study, participants who self-reported: 1) No prior training, 2) FA training only or 2) FA + HC training were compared. Logistic regression adjusting for age, gender, education, willingness-to-assist, and comfort level in HC was performed.

RESULTS

317 participants were included. Compared to participants with no prior training (14.4%,n = 16/111), those with FA training only (25.2%,n = 35/139) had a 2.12-higher odds (95%CI:1.07-4.18) of correct tourniquet application while those with FA + HC (35.8%,n = 24/67) had a 3.50-higher odds (95%CI:1.59-7.72) of correct application. Participants with prior FA + HC were more willing-to-assist and comfortable performing HC than those without prior training (p < 0.05). However, reporting being very willing-to-assist [OR0.83,95%CI:0.43-1.60] or very comfortable [OR1.11,95%CI:0.55-2.25] was not associated with correct tourniquet application.

CONCLUSION

Self-reported prior FA + HC training, while associated with increased likelihood to correctly apply a tourniquet, results in only 1/3 of individuals correctly performing the skill. As work continues in empowering and training laypeople to act as immediate responders, these findings highlight the importance of effective layperson education techniques.

Alterations in 90-day morbidity, mortality, and readmission rates following spine surgery in Medicare Accountable Care Organizations (2009-2014)

BACKGROUND CONTEXT

The impact of Accountable Care Organizations (ACOs) on healthcare quality and outcomes, including morbidity, mortality, and readmissions, has not been substantially investigated, especially following spine surgery.

PURPOSE

To evaluate the impact of ACO formation on postoperative outcomes in the 90-day period following spine surgery.

STUDY DESIGN

Retrospective review of national Medicare claims data (2009-2014).

PATIENT SAMPLE

Patients who underwent one of four lumbar spine surgical procedures in an ACO or non-ACO.

OUTCOME MEASURES

The development of in-hospital mortality, complications or hospital readmission within 90 days of the surgical procedure.

METHODS

The primary outcome measures included postsurgical complications and readmissions at 90 days following surgery. In-hospital mortality and 30-day outcomes were considered secondarily. The primary predictor variable consisted of ACO enrollment designation. Multivariable logistic regression analysis was utilized to adjust for confounders and determine the independent effect of ACO enrollment on postsurgical outcomes. The multivariable model included a propensity score adjustment that accounted for factors associated with the preferential enrollment of patients in ACOs, namely, sociodemographic characteristics, medical co-morbidities, hospital teaching status, bed size, and location.

RESULTS

In all, there were 344,813 patients identified for inclusion in this analysis with 97% (n = 332,890) treated in non-ACOs and 3% (n = 11,923) in an ACO. Although modest changes were apparent across both ACOs and non-ACOs over the time-period studied, improvements were slightly more dramatic in non-ACOs leading to statistically significant differences in both 90-day complications and readmissions. Specifically, in the period 2012-2014, ACOs demonstrated an 18% increase in the odds of 90-day complications and a 14% elevation in the odds of 90-day readmissions when compared to non-ACOs. There was no difference in hospital mortality between ACOs and non-ACOs.

CONCLUSIONS

Our study of Medicare data from 2009 to 2014 failed to demonstrate superior reductions in postoperative morbidity, mortality, and readmissions for beneficiaries treated in ACOs as compared to non-ACOs. These results indicate that meaningful changes in postoperative outcomes should not be anticipated based on organizational participation in ACOs at present.

The Cost of Complications Following Major Resection of Malignant Neoplasia

BACKGROUND

Rising healthcare costs have led to increased focus on the need to achieve a higher "value of care." As value-maximization efforts expand to include more complex surgical patients, evidence to support meaningful implementation of complication-based initiatives is lacking. The objective of this study was to compare incremental costs of complications following major gastrointestinal (GI) resections for organ-specific malignant neoplasia using nationally representative data.

METHODS

National (Nationwide) Inpatient Sample data, 2001-2014, were queried for adult (≥ 18 years) patients undergoing major resections for malignant neoplasia. Based on system-based complications considered relevant to the long-term treatment of GI disease, stratified differences in risk-adjusted incremental hospital costs and complication probabilities were compared. Differences in surgical outcomes and costs over time were also assessed.

RESULTS

A total of 293,967 patients were included, weighted to represent 1,408,117 patients nationwide. One fourth (26.1%; 95% CI, 25.7-26.4%) experienced ≥ 1 pre-discharge complication (range, 45.3% esophagectomy to 24.0% rectal resection). Resultant annual risk-adjusted incremental hospital costs totaled $540 million nationwide (19.5% of the overall cost of care and an average of $20,900 per patient). Costs varied substantially with both cancer/resection type and complication group, ranging from $76.7 million for colectomies with infectious complications to $0.2 million for rectal resections with urinary complications. For each resection type, infectious ($154.7 million), GI ($85.5 million), and pulmonary ($77.9 million) complications were among the most significant drivers of increased hospital cost.

CONCLUSIONS

Quantifying and comparing the impact of complications on an indication-specific level in more complex patients offers an important step toward allowing providers/payers to meaningfully prioritize the design of novel and adaptation of existing value-maximization approaches.

The impact of inpatient palliative care on end-of-life care among older trauma patients who die after hospital discharge

BACKGROUND

Palliative care (PC) is associated with lower-intensity treatment and better outcomes at the end of life. Trauma surgeons play a critical role in end-of-life (EOL) care; however, the impact of PC on health care utilization at the end of life has yet to be characterized in older trauma patients.

METHODS

This retrospective cohort study using 2006 to 2011 national Medicare claims included trauma patients 65 years or older who died within 180 days after discharge. The exposure of interest was inpatient PC during the trauma admission. A non-PC control group was developed by exact matching for age, comorbidity, admission year, injury severity, length of stay, and post-discharge survival. We used logistic regression to evaluate six EOL care outcomes: discharge to hospice, rehospitalization, skilled nursing facility or long-term acute care hospital admission, death in an institutional setting, and intensive care unit admission or receipt of life-sustaining treatments during a subsequent hospitalization.

RESULTS

Of 294,665 patients who died within 180 days after discharge, 2.1% received inpatient PC. Among 5,693 matched pairs, inpatient PC was associated with increased odds of discharge to hospice (odds ratio [OR], 3.80; 95% confidence interval [CI], 3.54-4.09) and reduced odds of rehospitalization (OR, 0.17; 95% CI, 0.15-0.20), skilled nursing facility/long-term acute care hospital admission (OR, 0.43; 95% CI, 0.39-0.47), death in an institutional setting (OR, 0.34; 95% CI, 0.30-0.39), subsequent intensive care unit admission (OR, 0.51; 95% CI, 0.36-0.72), or receiving life-sustaining treatments (OR, 0.56; 95% CI, 0.39-0.80).

CONCLUSION

Inpatient PC is associated with lower-intensity and less burdensome EOL care in the geriatric trauma population. Nonetheless, it remains underused among those who die within 6 months after discharge.

LEVEL OF EVIDENCE

Therapeutic/Care management, level III.

Impact of Affordable Care Act Insurance Expansion on Pre-Hospital Access to Care: Changes in Adult Perforated Appendix Admission Rates after Medicaid Expansion and the Dependent Coverage Provision

BACKGROUND

The Affordable Care Act (ACA) changed the landscape of insurance coverage, allowing young adults to remain on their parents' insurance until age 26 (Dependent Coverage Provision [DCP]) and states to optionally expand Medicaid up to 133% of the federal poverty level. Although both improved insurance coverage, little is known about the ACA's impact on observed receipt of timely access to acute care. The objective of this study was to compare changes in insurance coverage and perforation rates among hospitalized adults with acute appendicitis "after vs before" Medicaid expansion and the DCP using an Agency for Healthcare Research and Quality (AHRQ)-certified metric designed to measure pre-hospital access to care.

STUDY DESIGN

We performed a quasi-experimental, difference-in-difference (DID) analysis of 2008-2015 state-level inpatient claims.

RESULTS

Adults, aged 19 to 64, in expansion states experienced an absolute 7.7 percentage point decline in uninsured (95% CI 7.5 to 7.9) after Medicaid expansion compared with nonexpansion states. This coincided with a 5.4 percentage point drop in admissions for perforated appendicitis (95% CI 5.0 to 5.8) that was most pronounced among young adults, aged 26 to 34, just age-ineligible for the DCP (DID: 11.5 percentage points). Medicaid expansion insurance changes were 4.1 times larger than those encountered under the DCP (DID: 1.9). They affected all population subgroups and significantly reduced access-related disparities in race/ethnicity and lower-income communities. Although both Medicaid expansion and the DCP were associated with significant insurance gains, those attributable to the DCP were more concentrated among more privileged patients. Despite this trend, both policies resulted in larger reductions in perforation rates for historically uninsured and underserved groups.

CONCLUSIONS

Reductions in uninsured after Medicaid expansion and the DCP were associated with significant reductions in perforated appendix admission rates. Improvements in access to acute surgical care suggest that maintained/continued insurance expansion could lead to fewer delays, better patient outcomes, and reductions in disparities among the most at-risk populations.