National variation in the delivery of radiation oncology procedures in the non-facility-based setting.

PURPOSE: Though utilization of medical procedures has been shown to vary considerably across the United States, similar efforts to characterize variation in the delivery of radiation therapy (RT) procedures have not been forthcoming. Our aim was to characterize variation in the delivery of common RT procedures in the Medicare population. We hypothesized that delivery would vary significantly based on provider characteristics. METHODS: The Centers for Medicare and Medicaid Services (CMS) Physician and Other Supplier Public Use File was linked to the CMS Physician Compare (PC) database by physician NPI to identify and sum all treatment delivery charges submitted by individual radiation oncologists in the non-facility-based (NFB) setting in 2016. Multivariable logistic regression analysis was carried out to determine provider characteristics (gender, practice rurality, practice region, and years since graduation) that predicted for the delivery of 3D conformal RT (3DCRT), intensity modulated RT (IMRT), stereotactic body RT (SBRT), stereotactic radiosurgery (SRS), low dose rate (LDR) brachytherapy, and high dose rate (HDR) brachytherapy delivery in the Medicare patient population. The overall significance of categorical variables in the multivariable logistic regression model was assessed by the likelihood ratio test (LRT). RESULTS: In total, 1,802 physicians from the NFB practice setting were analyzed. Male gender predicted for greater LDR brachytherapy delivery (OR 8.19, 95% CI 2.58-26.05, p < 0.001), but not greater delivery of other technologies. Metropolitan practice was the only predictor for greater HDR brachytherapy utilization (OR 12.95, 95% CI 1.81-92.60, p = 0.01). Practice region was predictive of the delivery of 3DCRT, SRS and SBRT (p < 0.01, p < 0.001, and p < 0.001, respectively). With the Northeast as the reference region, 3DCRT was more likely to be delivered by providers in the South (OR 1.33, 95% CI 1.09-1.62, p < 0.01) and the West (OR 1.38, 95% CI 1.11-1.71, p < 0.01). At the same time, SRS use was less likely in the Midwest (OR 0.71, 95% CI 0.55-0.91, p < 0.01), South (OR 0.49, 95% CI 0.40-0.61, p < 0.001), and West (OR 0.43, 95% CI 0.34-0.55, p < 0.001). SBRT, on the other hand, was more commonly utilized in the Midwest (OR 2.63, 95% CI 1.13-6.13, p = 0.03), South (OR 3.44, 95% CI 1.58-7.49, p < 0.01), and West (OR 4.87, 95% CI 2.21-10.72, p < 0.001). HDR brachytherapy use was also more likely in the Midwest (OR 1.97, 95% CI 1.11-3.49, p = 0.02) and West (OR 1.87, 95% CI 1.08-3.24, p = 0.03). While the degree held by the billing physician did not predict for delivery of a given procedure, greater years since graduation was related to decreased likelihood of SBRT use (OR 0.98, 95% CI 0.96-0.99, p < 0.001) and increased likelihood of LDR brachytherapy use (OR 1.02, 95% CI 1.00-1.04, p = 0.02). CONCLUSIONS: Substantial geographic variation in the use of specific RT technologies was identified. The degree to which this variation reflects effective care, preference-sensitive care, or supply-sensitive care warrants further investigation.

Evaluating Bias in Speaker Introductions at the American Society for Radiation Oncology Annual Meeting.

PURPOSE: Introducing a physician without a professional title may reinforce bias in medicine by influencing perceived credibility. We evaluated differences in the use of professional titles in introductions of speakers at recent American Society for Radiation Oncology (ASTRO) Annual Meetings. METHODS AND MATERIALS: We reviewed recordings from the 2017 to 2019 ASTRO Annual Meetings and included complete introductions of speakers with a doctoral degree. Professional introduction was defined as "Doctor" or "Professor" followed by the speaker's full or last name. We collected use of professional introduction, introducer gender, speaker gender, and speaker professional and demographic variables. Identified speakers were sent surveys to collect self-reported demographic data. Analysis was performed using χ2 tests and multivariable logistic regression (MVA). RESULTS: Of 3267 presentations reviewed, 1226 (38%) met the inclusion criteria. Overall, 805 (66%) speakers and 710 (58%) introducers were men. Professional introductions were used in 74% (2017), 71% (2018), and 69% (2019) of the presentations. There was no difference in the use of professional introductions for male and female speakers (71% vs 73%; P = .550). On MVA, male introducers were associated with decreased use of professional address (odds ratio [OR], 0.36; 95% confidence interval [CI], 0.26-0.49; P < .001). At the 2019 conference, professional introduction was less likely to be used (2019 vs 2017: OR, 0.68; 95% CI, 0.49-0.96; P = 0.026). Those who self-identified as Asian/Pacific Islander were twice as likely to receive a professional introduction compared with those who identified as white (OR, 1.95; 95% CI, 1.07-3.64; P = .033). CONCLUSION: Male introducers were significantly less likely to introduce any speaker, regardless of gender, by their professional title, and overall use of professional introductions decreased from 2017 to 2019. Furthermore, no difference in professional introduction use by speaker gender was identified at the recent ASTRO meetings. Implementing speaker guidelines could increase the use of professional introductions and raise awareness of unconscious bias at future ASTRO meetings.

Travel Time to Radiation Oncology Facilities in the United States and the Influence of Certificate of Need Policies.

PURPOSE: Radiation therapy often requires weeks of daily treatment making travel distance a known barrier to care. However, the full extent and variability of travel burden, defined by travel time, across the nation is poorly understood. Additionally, some states restrict radiation oncology (RO) services through Certificate of Need (CON) policies, but it is unknown how this affects travel times to care. Therefore, we aim to evaluate travel times to US RO facilities and assess the association with CON policies. METHODS AND MATERIALS: RO facilities were identified from the 2018 National Plan and Provider Enumeration System (n = 2302). Travel times from populated US census tracts to nearest facility were calculated; differences by rurality, area deprivation, and region were computed. Multivariable linear regression was used to estimate adjusted differences in travel time by area characteristics. Logistic regression was used to assess the association of state CON laws with travel time >1 hour. RESULTS: Among 72,471 census tracts, 92.4% were within 1 hour of the nearest radiation facility. Among the 12,453 rural tracts, 34.4% were >1 hour. On adjusted analysis, the 3054 isolated rural tracts had an estimated 58-minute (95% confidence interval [CI] 57, 59; P < .001) longer travel time than urban tracts. CON laws decreased rural travel time overall, but the association varied by region with decreased odds of prolonged travel in the South (P < .001), increased odds in the Northeast and Midwest (P < .001), and no association in the West (P = NS). CONCLUSIONS: Isolated rural US census tracts, accounting for 9.4 million Americans, have nearly 1-hour longer adjusted travel time to the nearest RO facility, compared with urban tracts. CON laws had region-dependent associations with prolonged travel.

Merit-Based Incentive Payment System (MIPS) Participation in Radiation Oncology Practices - A Simple Survey.

PURPOSE: Our purpose was to survey nationwide radiation oncology practices on their participation in, burden of, and satisfaction with the Medicare Access and Children's Health Insurance Program Reauthorization Act of 2015 (MACRA) payment programs. METHODS AND MATERIALS: All radiation oncology practices accredited by a national specialty organization were invited to participate in a voluntary online survey from December 2018 to January 2019. Questions focused on participation in the Merit-based Incentive Payment System (MIPS) in 2017 and 2018, as by the time of this survey, radiation oncology did not yet have a specialty-specific advanced Alternative Payment Model. RESULTS: Of n = 705 solicited practices, n = 199 completed the survey for an overall response rate of 28.2%. Practices varied significantly in their duration of participation in MACRA programs, means of data submission, and reported improvement activities under MIPS. Forty-nine percent of respondents described being either somewhat or extremely dissatisfied with the ease of submitting measures and data in 2018. The estimated cost to the practices of compliance with MACRA was queried in bins; of users able to estimate the cost of compliance for 2018, the median reported bin was $10,001 to $20,000 (range, less than $1000-100,000 or more). CONCLUSIONS: The participation style in MACRA among radiation oncology practices varied substantially in the years 2017 and 2018. The Center for Medicare & Medicaid Services gave no precise estimates on the cost of compliance for MIPS, but estimated a $3019.47 cost of compliance with the mandated Radiation Oncology Alternative Payment Model in the 2020 Final Rule for selected practices. In this survey, respondents commonly reported the cost of compliance with MACRA significantly exceeded this estimate.

Faculty of Radiation Oncology 2018 workforce census: the status of the radiation oncology workforce in New Zealand.

AIM: This paper outlines the results of the Royal Australian and New Zealand College of Radiologists (RANZCR) Faculty of Radiation Oncology (FRO) 2018 workforce census. Here we report the responses of New Zealand radiation oncologists and trainees in order to understand characteristics of the New Zealand radiation oncology workforce. METHOD: The workforce census was conducted online during July-September 2018. Distribution was by Survey Monkey to all radiation oncologists (fellows, life members, educational affiliates, retired) and trainees on the RANZCR membership database, including members from Australia, New Zealand and Singapore. All responses were aggregated for analysis. This paper addresses only responses from New Zealand members. The census was designed to explore issues relevant to the New Zealand workforce, and questions from previous workforce censuses were repeated in order to monitor trends. RESULTS: The response rate for New Zealand radiation oncologists was 73.3% (44/60). The majority (67%) were male. The average age was 50.8 years. Three-fifths (59.5%) reported New Zealand ethnicity. One-third obtained their specialist qualifications outside of Australia and New Zealand. Most worked in the public sector only (63.4%), with only two in exclusive private practice. Most radiation oncologists attained a consultant post immediately on completion of training, but there were 26 who pursued an overseas fellowship. Most worked one full-time equivalent or greater (FTE), with 17.5% working less than 1.0 FTE. Radiation oncologists reported working a median of 50.0 hours per week, with half working over 10 hours above their contracted hours. Most time was spent on clinical duties with minimal time spent on research. Radiation oncologists reported seeing an average of 235 new patients per year (median: 230). Leadership positions were held by 21/43 respondents. Within 15 years, 55% of the current workforce reported an intention to retire, including 30% of those currently practising highly specialised brachytherapy. Females in the workforce were less likely to work fulltime and spent less time in research and management activities. All trainees reported full-time work, although 50% expressed a desire for part-time training. Half of the trainees reported working 6-10 hours on call, and 60% reported two or less hours of protected teaching per week. Despite this, 90% of trainees were satisfied with their career choice. CONCLUSIONS: Radiation oncology is a small specialty in New Zealand, with a significant reliance on overseas-trained specialists. The specialty continues to work significant overtime hours while time spent on research and non-clinical duties remains low. The growth in staffing between the 2014 and 2018 census has been low. Trainee numbers do not appear sufficient to meet the demand for replacing staff, due to retirements and the reduction of hours. Radiation intervention rates are low in New Zealand, but growth would be reliant on an expansion of the workforce beyond simply replacing staff losses. The radiation oncology workforce in New Zealand remains vulnerable, and careful consideration must be given to expansion and retention to ensure a viable workforce for the future.

Bibliometric analysis of the 100 most cited articles on cervical cancer radiotherapy.

PURPOSE: To identify the 100 most cited research articles on cervical cancer radiotherapy. METHODS: The Web of Science and Scopus databases were searched to identify the 100 most cited articles on cervical cancer radiotherapy as of September 29, 2019. Articles were ranked based on the total citations received from 2 databases. One hundred articles about radiotherapy for cervical cancer were identified. The following important information was extracted: author, journal, year and month of publication, country or region, and radiotherapy technologies. RESULTS: The 100 most cited articles on cervical cancer radiotherapy were published between 1964 and 2016, and the total citations from 2 databases ranged from 3478 to 211, including a total of 49,262 citations as of September 29, 2019. The index of citations per year ranged from 170.4 to 13.1. These articles were from 16 countries or regions, with most publications being from the United States (n = 38), followed by Austria (n = 15), Canada (n = 8), France (n = 8) and the United Kingdom (n = 7). The International Journal of Radiation Oncology, Biology, Physics produced the most articles (n = 42), followed by Radiotherapy and Oncology (n = 13), Cancer (n = 8) and Journal of Clinical Oncology (n = 7). These articles were categorized as original studies (n = 86), recommendations (n = 5), guidelines (n = 5) and reviews (n = 4). Of the 100 most cited articles, intracavitary brachytherapy (n = 50) and 3-dimensional conformal radiotherapy (n = 34) were the most commonly used treatment techniques. CONCLUSION: To the best of our knowledge, this is the first report and analysis of the most cited articles on cervical cancer radiotherapy. This bibliographic study presents the history of technological development in external radiation therapy and brachytherapy. Brachytherapy is an indispensable part of radiotherapy for cervical cancer. The International Journal of Radiation Oncology Biology Physics is the journal with the most publications related to cervical cancer radiotherapy.

Radiotherapy in the Caribbean: a spotlight on the human resource and equipment challenges among CARICOM nations.

BACKGROUND: There is limited data on access to radiotherapy services for CARICOM nations. METHODS: This was a descriptive mixed-methods observational study which used data collected via survey from staff working in Radiation Oncology in 14 CARICOM countries. Benchmark recommendations from the International Atomic Energy Agency were compared to existing numbers. The Directory of Radiotherapy Centers, World Bank, and Global Cancer Observatory databases were all accessed to provide information on radiotherapy machines in the region, population statistics, and cancer incidence data respectively. Both population and cancer incidence-based analyses were undertaken to facilitate an exhaustive review. RESULTS: Radiotherapy machines were present in only 50% of the countries. Brachytherapy services were performed in only six countries (42.9%). There were a total of 15 external beam machines, 22 radiation oncologists, 22 medical physicists, and 60 radiation therapists across all nations. Utilizing patient-based data, the requirement for machines, radiation oncologists, medical physicists, and radiation therapists was 40, 66, 44, and 106, respectively. Only four (28.6%) countries had sufficient radiation oncologists. Five (35.7%) countries had enough medical physicists and radiation therapists. Utilizing population-based data, the necessary number of machines, radiation oncologists, and medical physicists was 105, 186, and 96 respectively. Only one county (7.1%) had an adequate number of radiation oncologists. The number of medical physicists was sufficient in just three countries (21.4%). There were no International Atomic Energy Agency population guidelines for assessing radiation therapists. A lower economic index was associated with a larger patient/population to machine ratio. Consequentially, Haiti had the most significant challenge with staffing and equipment requirements, when compared to all other countries, regardless of the evaluative criteria. Depending on the mode of assessment, Haiti's individual needs accounted for 37.5% (patient-based) to 59.0% (population-based) of required machines, 40.1% (patient-based) to 59.7% (population-based) of needed radiation oncologists, 38.6% (patient-based) to 58.3% (population-based) of medical physicists, and 42.5% (patient-based) of radiation therapists. CONCLUSION: There are severe deficiencies in radiotherapy services among CARICOM nations. Regardless of the method of comparative analysis, the current allocation of equipment and staffing scarcely meets 50% of regional requirements.

Assessment of the Medical Schools From Which Radiation Oncology Residents Graduate and Implications for Diversifying the Workforce.

PURPOSE: To identify factors predictive of a medical school graduating a high volume of future radiation oncology (RO) residents to better understand potential pathways to effectively recruit women and underrepresented minority (URM) students into RO. METHODS AND MATERIALS: Demographics for US allopathic medical schools and affiliated RO departments were collected from web resources and correlated with the percentage of graduates from each school currently enrolled in RO residency in 2019, and the probability of at least 1 female or URM student from each school pursuing RO. RESULTS: The median percentage of students per medical school who pursued RO residency was 0.37% (interquartile range, 0.16%-0.66%). A total of 79.7% of schools graduated at least 1 RO resident, whereas 51.7% graduated at least 1 female RO resident and 14.0% graduated at least 1 URM RO resident. The 30 schools graduating the highest percentage of RO residents accounted for 52.1% of current RO residents, only 4 of which were in the top quartile for URM enrollment. Medical students were significantly more likely to pursue RO when there was an affiliated RO department (0.42% vs 0.18%, P < .001) or RO residency program (0.51% vs 0.18%, P < .001), more total RO faculty (rs = 0.521, P < .001), female RO faculty (rs = 0.481, P < .001), and URM RO faculty (rs = 0.197, P < .001). The probability of at least 1 female student pursuing RO was also correlated with the number of female faculty in the affiliated RO department (rpb = 0.348, P = .001), and a similar correlation was observed between URM students and URM faculty (rpb = 0.312, P = .011). CONCLUSIONS: Most RO residents graduate from medical schools with larger affiliated RO departments but fewer URM students. To promote greater RO diversity, outreach should be considered among schools with greater URM enrollment but fewer affiliated radiation oncologists, and among female and URM students in schools that graduate many RO residents.

A targeted needs assessment to improve referral patterns for palliative radiation therapy.

Radiation therapy (RT) can effectively palliate a variety of symptoms in patients with metastatic cancer, using relatively low doses that infrequently cause major side effects. However, palliative radiation is often underutilized and sub-optimally implemented. In this study, we surveyed the Society of Palliative Radiation Oncology (SPRO) membership to identify barriers to appropriate referral for palliative RT that they encounter in their practice, and identify specific groups of physicians who radiation oncologists believed would benefit most from further education on when to refer patients. A total of 28 radiation oncologists responded to the survey with a response rate of 20.5%. On average, participants felt that referrals for palliative RT were inappropriately delayed 46.5% [standard deviation (STD) 20.2%] of the time. The most common barrier to referral for medical oncologists was thought to be potential interference with systemic therapy (33%); for primary care physicians and surgeons it was a lack of knowledge about the benefit (42%), and for palliative care physicians it was concern for patient convenience (25%). For brain metastases and spinal cord compression radiation oncology was felt to be part of the initial referral sequence more than 50% of the time, but less so for thoracic airway obstruction/bleeding (38%), esophageal obstruction (16%), or urinary obstruction/bleeding (8%), where another subspecialist was more often consulted first. Primary care, geriatric medicine, and emergency medicine were considered among the least knowledgeable specialties about palliative radiation. These hypothesis-generating findings can guide approaches to improve referral patterns for this important aspect of supportive care.

National Trends and Dynamic Responses in the Canadian Radiation Oncology Workforce From 1990 to 2018.

PURPOSE: To report radiation oncology (RO) workforce and cancer incidence trends in Canada and explore the relationship between the two. METHODS AND MATERIALS: Canadian radiation oncologist, trainee, and cancer incidence data from 1990 to 2018 were collected from the following publicly accessible administrative and health information databases: Canadian Post-MD Education Registry (1990-2018), Canadian Medical Association Physician Data Centre (1994-2018), Canadian Institute for Health Information/Scott's Medical Database (1990-2017), Canadian Cancer Registry (1990-2017), and Statistics Canada (1990-2017). Descriptive statistics were used to summarize the data. RESULTS: The Canadian RO workforce grew from 240 radiation oncologists in 1990 to 567 in 2018, with the largest growth period from 2005 to 2015 adding 207 radiation oncologists. Regional analyses revealed steady or stepwise growth in all Canadian regions, except in Québec, where the number of radiation oncologists decreased from 86 in 1990 to 57 in 2003 before rising to 139 by 2018. Trainee totals were between 54 and 173 per year with 2 periods of growth (1990-1996 and 2001-2008) and regression (1996-2001 and 2008-2018), signifying trainee supply variability. Female proportions of the workforce and trainees, respectively, rose steadily from 18% to 38% and 28% to 50%, while the workforce proportion with non-Canadian medical degrees decreased from 40% to 26%. Radiation oncologists younger than 40 years increased from 70 to 171, whereas those age 60 years and older decreased from 85 in 1990 to 31 in 2002 and then increased to 108 in 2017. Annual cancer incidence rose steadily from 103,780 to 206,290 cases/year. The annual cancer incidence-to-provider ratio fluctuated (364-475:1) and trended lower with time, and proportional cancer incidence-to-provider ratios varied between 0.7:1 and 1.6:1 in Canada's regions before approaching 1:1. CONCLUSIONS: Our study demonstrates the challenges and successes of managing the Canadian radiation oncologist workforce. These data will inform policy makers and other stakeholders to ensure that the profession meets the current and future needs of Canadian cancer patients.

Mind the Gap: An Analysis of "Gap Year" Prevalence, Productivity, and Perspectives Among Radiation Oncology Residency Applicants.

PURPOSE: Medical students may take a year off during medical school (a "gap year") to strengthen their applications for competitive specialties such as radiation oncology. This can incur significant financial and opportunity costs. We sought to understand the prevalence, nature, and funding of gap years undertaken by radiation oncology applicants. METHODS AND MATERIALS: An anonymous survey was emailed to all applicants to a single radiation oncology program from 2015 to 2017. Survey questions assessed gap year utilization, funding, motivations, and perceptions. Separately, all 2017 Electronic Residency Application Service (n = 176) applications to this program were reviewed for reference. RESULTS: The 2017 cohort had a response rate of 69% (n = 121), with an overall response rate of 39% (n = 194) for applicants between 2015 to 2017. Of non-MD/PhD respondents, 33% (n = 53) reported taking a gap year. The main reason for a gap year (68%) was to produce more publications, and 50% of all respondents viewed a gap year as "important" or "very important" for matching in radiation oncology. Twenty-eight students (53%) reported using personal loans, savings, or family support to cover gap year expenses. Most who took a gap year (83%) viewed funding as "difficult" or "extremely difficult" to obtain. Fewer publications before gap year and more dedicated research time were significant predictors of undertaking a gap year, whereas sex, marital status, dependent status, and financial aid were not significant. CONCLUSIONS: Research productivity is commonly perceived as important for matching in radiation oncology, leading many applicants to take gap years, which are usually supported by personal financial resources. We did not identify statistically significant socioeconomic disparities between applicants that took a gap year and those who did not. However, further study is warranted to determine whether pressure to take a gap year, particularly in the absence of readily available funding sources, deters some potential applicants from pursuing radiation oncology altogether.

Differences in United States Insurance Payer Policies and American Society for Radiation Oncology's (ASTRO) Model Policy on Stereotactic Body Radiation Therapy (SBRT).

PURPOSE: Insurance payers in the United States vary in the indications for which they consider stereotactic body radiation therapy (SBRT) "medically necessary." We compared changes in policies after the last update to the American Society for Radiation Oncology's (ASTRO) SBRT model policy. METHODS AND MATERIALS: We identified 77 payers with SBRT policies in 2015 from a policy aggregator, as well as 4 national benefits managers (NBMs). Of these, 65 payers and 3 NBMs had publicly available updates since 2015. For each of the indications in ASTRO's model policy, we calculated the proportion of payers that considered SBRT medically necessary. We used Fisher's exact test to compare these proportions between 2015 and now, between policies updated in the past 12 months and those updated less often, and between national and regional payers currently. RESULTS: Payers consider SBRT medically necessary most often for primary lung cancer (97%), reirradiation to the spine (91%), prostate cancer (68%), primary liver cancer (66%), and spinal metastases with radioresistant histologies (66%). Policies have become more aligned with ASTRO's model policy over time. National payers and NBMs cover indications in higher proportions than regional payers. CONCLUSIONS: Although there have been improvements over time, more work is needed to align payer policies with ASTRO's model SBRT policy, especially at the regional level.

Gender, Professional Experiences, and Personal Characteristics of Academic Radiation Oncology Chairs: Data to Inform the Pipeline for the 21st Century.

PURPOSE: Understanding the pathways and gateways to leadership and challenges faced by individuals in such roles can inform efforts to promote diversity and equity. We sought to describe the professional experiences and personal characteristics of academic radiation oncology (RO) chairs and to evaluate whether differences exist by gender. METHODS AND MATERIALS: Anonymous surveys were distributed to 95 chairs of RO departments during the 2016 annual meeting of the Society of Chairs of Academic Radiation Oncology Programs. The surveys included 28 closed-ended questions and the Leadership Practices Inventory. Results were analyzed by gender using χ2 tests, rank-sum, and t tests (significance P < .05). RESULTS: A total of 72 chairs responded (61 male, 10 female, 1 declined to identify gender) for a response rate of 76%. There were no significant gender differences in age, academic rank, publications, or prior leadership positions held at the time of the first chair appointment, but female respondents held significantly greater total direct funding from extramural grants than their male counterparts (median, $1.89 million [interquartile range, $0.5-$5 million] vs $0.25 million [interquartile range, $0-$1.0 million]; P = .006). Women were more likely to have spouses employed outside the home at time of their first chair appointment than men were, with a trend toward women experiencing greater difficulty relocating. Men and women identified budgeting and resource allocation as their greatest professional challenges. There were no gender differences in the Leadership Practices Inventory-identified leadership domains or professional goals. CONCLUSIONS: Female RO chairs are as equally qualified as men in terms of productivity or leadership skills, but they face distinct challenges in the context of a gender-structured society. The observation of higher grant funding among women at the time of chair appointment suggests a possible need for interventions such as unconscious bias training to ensure that selection processes do not unnecessarily hold women to a higher standard.

Predicting Radiation Therapy Process Reliability Using Voluntary Incident Learning System Data.

PURPOSE: This study aimed to present an innovative approach to quantify, visualize, and predict radiation therapy (RT) process reliability using data captured from a voluntary incident learning system, with an overall aim to improve patient safety outcomes. METHODS AND MATERIALS: We analyzed 111 reported deviations that were tripped and caught within 159 mapped RT process steps included within 7 major stages of RT delivery, 94 of which were any type of quality assurance (QA) controls. This allowed for us to compute the trip rate and fail-to-catch-rate (FCR) per each QA control with the available data. Next, we used a logistic regression model to identify significant variables predictive of FCRs, predicted FCRs for each QA control without available data, and thus, attempted to quantify RT process reliability expressed as percentage of patients with uncaught deviations after treatment planning, before their first treatment, and during treatment delivery. RESULTS: Using the predicted FCRs, we computed the upper 95% likelihood that a deviation remains uncaught in a patient's course of treatment at the following RT process stages: immediately after treatment planning at 10.26%; before the first treatment at 0.0052%; and throughout treatment delivery at 0.0276%. CONCLUSIONS: The results suggest that RT process reliability can be predicted and visualized using data from incident learning systems. If implemented and used as a safety metric, this could help RT clinics to proactively maintain their preoccupation with patient safety. RT process reliability may also help guide future work on standardization and continuous improvement of the design of RT QA programs.

Provider variability in intensity modulated radiation therapy utilization among Medicare beneficiaries in the United States.

BACKGROUND: In this study, we sought to examine the variation in intensity modulated radiation therapy (IMRT) use among radiation oncology providers. METHODS AND MATERIALS: The Medicare Physician and Other Supplier Public Use File was queried for radiation oncologists practicing during 2014. Healthcare Common Procedural Coding System code 77301 was designated as IMRT planning with metrics including number of total IMRT plans, rate of IMRT utilization, and number of IMRT plans per distinct beneficiary. RESULTS: Of 2759 radiation oncologists, the median number of total IMRT plans was 26 (mean, 33.4; standard deviation, 26.2; range, 11-321) with a median IMRT utilization rate of 36% (mean, 43%; standard deviation, 25%; range, 4% to 100%) and a median number of IMRT plans per beneficiary of 1.02 (mean, 1.07; range, 1.00-3.73). On multivariable analysis, increased IMRT utilization was associated with male sex, academic practice, technical fee billing, freestanding practice, practice in a county with 21 or more radiation oncologists, and practice in the southern United States (P < .05). The top 1% of users (28 providers) billed a mean 181 IMRT plans with an IMRT utilization rate of 66% and 1.52 IMRT plans per beneficiary. Of these 28 providers, 24 had billed technical fees, 25 practiced in freestanding clinics, and 20 practiced in the South. CONCLUSIONS: Technical fee billing, freestanding practice, male sex, and location in the South were associated with increased IMRT use. A small group of outliers shared several common demographic and practice-based characteristics.