Radiation Oncologist Shortage Creates Opportunity for NPs.

A 50% estimated increase in new cancer cases over the next few decades will significantly challenge health care systems already strained by a shortage of oncology providers. Radiation oncology (RO), 1 of 3 three primary pillars of oncology care, treats half of all new cancer cases. Workforce shortages, reimbursement changes, delays in patient treatment, and the lack of follow-up care all continue to increase pressure on RO centers to boost efficiency, improve patient and staff retention, and strive for service satisfaction. Nurse practitioners (NPs) can bring greater capacity, expertise, and profitability to RO, especially in light of the fact that demand is predicted to outstrip supply by as much as 10 times. It is critical, however, that NPs receive specialized training in RO's clinical, technological, and operational processes before assuming patient-facing roles.

Pooled analysis of recent studies of magnetic fields and childhood leukemia.

BACKGROUND: Over forty epidemiologic studies have addressed an association between measured or calculated extremely-low-frequency magnetic fields (MF) and childhood leukemia. These studies have been aggregated in a series of pooled analyses, but it has been 10 years since the last such. METHODS: We present a pooled analysis combining individual-level data (24,994 cases, 30,769 controls) from four recent studies on MF and childhood leukemia. RESULTS: Unlike previous pooled analyses, we found no increased risk of leukemia among children exposed to greater MF: odds ratio (OR) = 1.01, for exposure ≥0.4 µT (µT) compared with exposures <0.1 µT. Similarly, no association was observed in the subset of acute lymphoblastic leukemia, birth homes, studies using calculated fields, or when geocoding accuracy was ignored. In these studies, there is a decline in risk over time, also evident when we compare three pooled analyses. A meta-analysis of the three pooled analyses overall presents an OR of 1.45 (95% CI: 0.95-2.20) for exposures ≥0.4 µT. CONCLUSIONS: Our results are not in line with previous pooled analysis and show a decrease in effect to no association between MF and childhood leukemia. This could be due to methodological issues, random chance, or a true finding of disappearing effect.

Improving Incident Reporting in a Hospital-Based Radiation Oncology Department: The Impact of a Customized Crew Resource Training and Event Reporting Intervention.

Background Radiation oncology (RO) is a high-risk environment with an increased potential for error due to the complex automated and manual interactions between heterogeneous teams and advanced technologies. Errors involving procedural deviations-- can adversely impact patient morbidity and mortality. Under-reporting of errors is common in healthcare for reasons such as fear of retribution, liability, embarrassment, etc. Incident reporting is a proven tool for learning from errors and, when effectively implemented, can improve quality and safety. Crew resource management (CRM) employs just culture principles with a team-based safety system. The pillars of CRM include mandatory error reporting and structured training to proactively identify, learn from, and mitigate incidents. High-reliability organizations, such as commercial aviation, have achieved exemplary safety performance since adopting CRM strategies. Objective Our aim was to double the rate of staff error reporting from baseline rates utilizing CRM strategies during a six-month study period in a hospital-based radiation oncology (RO) department. Methods This quasi-experimental study involved a retrospective review of reported radiation oncology incidents between January 2015 and March 2016, which helped inform the development and implementation of a two-step custom CRM training and incident learning system (ILS) intervention in May 2016. A convenience sample of approximately 50 RO staff (Staff) performing over 100 external beam and daily brachytherapy treatments participated in weekly training for six months while continuing to report errors on a hospital-enterprise system. A discipline-specific incident learning system (ILS) customized for the department was added during the last three months of the study, enabling staff to identify, characterize, and report incidents and potential errors. Weekly process control charts used to trend incident reporting rates (total number of reported incidents in a given month /1000 fractions), and custom reports characterizing the potential severity as well as the location of incidents along the treatment path, were reviewed, analyzed, and addressed by an RO multidisciplinary project committee established for this study. Results A five-fold increase in the monthly reported number of incidents (n = 9.3) was observed during the six-month intervention period as compared to the 16-month pre-intervention period (n = 1.8). A significant increase (>3 sigma) was observed when the custom reporting system was added during the last three study months. Conclusion A discipline-specific electronic ILS enabling the characterization of individual RO incidents combined with routine CRM training is an effective method for increasing staff incident reporting and engagement, leading to a more systematic, team-based mitigation process. These combined strategies allowed for real-time reporting, analysis, and learning that can be used to enhance patient safety, improve teamwork, streamline communication, and advance a culture of safety.

Childhood leukemia risk in the California Power Line Study: Magnetic fields versus distance from power lines.

Pooled analyses have suggested a small increased risk of childhood leukemia associated with distance and with exposure to high magnetic fields from power transmission lines. Because magnetic fields are correlated with distance from lines, the question of whether the risk is due to magnetic fields exposure or to some other factor associated with distance from lines is unresolved. We used data from a large records-based case-control study to examine several research questions formulated to disentangle the relationships among magnetic fields, distance from high voltage lines, and childhood leukemia risk. In models examining an interaction between distance and magnetic fields exposure, we found that neither close proximity to high voltage lines alone nor exposure to high calculated fields alone were associated with childhood leukemia risk. Rather, elevated risk was confined to the group that was both very close to high voltage lines (<50 m) and had high calculated fields (≥0.4 µT) (odds ratio 4.06, 95% CI 1.16, 14.3). Further, high calculated fields (≥0.4 µT) that were due solely to lower voltage lines (<200 kV) were not associated with elevated risk; rather, risk was confined to high fields attributable to high voltage lines. Whilst other explanations are possible, our findings argue against magnetic fields as a sole explanation for the association between distance and childhood leukemia and in favor of some other explanation linked to characteristics of power lines.

Proximity to overhead power lines and childhood leukaemia: an international pooled analysis.

BACKGROUND: Although studies have consistently found an association between childhood leukaemia risk and magnetic fields, the associations between childhood leukaemia and distance to overhead power lines have been inconsistent. We pooled data from multiple studies to assess the association with distance and evaluate whether it is due to magnetic fields or other factors associated with distance from lines. METHODS: We present a pooled analysis combining individual-level data (29,049 cases and 68,231 controls) from 11 record-based studies. RESULTS: There was no material association between childhood leukaemia and distance to nearest overhead power line of any voltage. Among children living < 50 m from 200 + kV power lines, the adjusted odds ratio for childhood leukaemia was 1.33 (95% CI: 0.92-1.93). The odds ratio was higher among children diagnosed before age 5 years. There was no association with calculated magnetic fields. Odds ratios remained unchanged with adjustment for potential confounders. CONCLUSIONS: In this first comprehensive pooled analysis of childhood leukaemia and distance to power lines, we found a small and imprecise risk for residences < 50 m of 200 + kV lines that was not explained by high magnetic fields. Reasons for the increased risk, found in this and many other studies, remains to be elucidated.

Comparative analyses of studies of childhood leukemia and magnetic fields, radon and gamma radiation.

In this paper we compare the findings of epidemiologic studies of childhood leukemia that examined at least two of ELF magnetic fields and/or distance to power lines, and exposure to radon and gamma radiation or distance to nuclear plants. Many of the methodologic aspects are common to studies of non-ionising (i.e. ELF-MF) and ionising radiation. A systematic search and review of studies with more than one exposure under study identified 33 key and 35 supplementary papers from ten countries that have been included in this review. Examining studies that have looked at several radiation exposures, and comparing similarities and differences for the different types of radiation, through the use of directed acyclic graphs, we evaluate to what extent bias, confounding and other methodological issues might be operating in these studies. We found some indication of bias, although results are not clear cut. There is little evidence that confounding has had a substantial influence on results. Influence of the residential mobility on the study conduct and interpretation is complex and can manifest as a selection bias, confounding, increased measurement error or could also be a potential risk factor. Other factors associated with distance to power lines and to nuclear power plants should be investigated. A more complete and consistent reporting of results in the future studies will allow for a more informative comparison across studies and integration of results.

Comparing the cost and outcomes of laparoscopic versus open appendectomy for perforated appendicitis in children.

Although laparoscopic appendectomy (LA) is accepted treatment for perforated appendicitis (PA) in children, concerns remain whether it has equivalent outcomes with open appendectomy (OA) and increased cost. A retrospective review was conducted of patients younger than age 17 years treated for PA over a 12.5-year period at a tertiary medical center. Patient characteristics, preoperative indices, and postoperative outcomes were analyzed for patients undergoing LA and OA. Of 289 patients meeting inclusion criteria, 86 had LA (29.8%) and 203 OA (70.2%), the two groups having equivalent patient demographics and preoperative indices. Inpatient costs were not significantly different between LA and OA. LA had a lower rate of wound infection (1.2 vs. 8.9%, P = 0.017), total parenteral nutrition use (23.3 vs. 50.7%, P < 0.0001), and length of stay (5.56 ± 2.38 days vs. 7.25 ± 3.77 days, P = 0.0001). There was no significant difference in the rate of postoperative organ space abscess, surgical re-exploration, or rehospitalization. In children with PA, LA had fewer surgical site infections and shorter lengths of hospital stay compared with OA without an increase in inpatient costs.

Residential mobility of populations near UK power lines and implications for childhood leukaemia.

Epidemiological studies suggest associations between childhood leukaemia and living near high-voltage power lines, but the most obvious potential causative agent, the magnetic fields produced by the power lines, is not supported by laboratory studies or a known mechanism. An alternative hypothesised explanation is if there is greater population mobility near power lines, linking to the findings of Kinlen that population mixing increases leukaemia rates. We used the names recorded in electoral registers to see whether people near power lines move house more often than the population as a whole. We did find variations, but only small ones, and not such as to support the hypothesis.

Exploring exposure--response for magnetic fields and childhood leukemia.

For 30 years, there have been suggestions that extremely low frequency magnetic fields such as those are produced by electric power systems may be associated with elevated risks of childhood leukemia. These suggestions are driven by epidemiological evidence, and it has been common to characterize that evidence as showing a threshold effect, with no increase in risk below a threshold, often 0.3 or 0.4 µT, and a constant risk above it. Such a threshold would, however, be biologically unlikely. We tested alternative dose-response relationships quantitatively. We obtained five exposure data sets, applied several candidate dose-response relationships to each one, and performed a regression analysis to see how well they fit each of the three epidemiological data sets. Threshold dose-response relationships performed only moderately. Linear relationships were generally even poorer. The fit was improved by adding quadratic terms or performing non-linear regression. There are limitations in our analysis, stemming from the available data, but addressing this issue in a data-based, quantitative manner should improve understanding, allow better calculations to be made of attributable numbers, and hence ultimately inform public policy making.

Extremely low frequency electric fields and cancer: assessing the evidence.

Much of the research and reviews on extremely low frequency (ELF) electric and magnetic fields (EMFs) have focused on magnetic rather than electric fields. Some have considered such focus to be inappropriate and have argued that electric fields should be part of both epidemiologic and laboratory work. This paper fills the gap by systematically and critically reviewing electric-fields literature and by comparing overall strength of evidence for electric versus magnetic fields. The review of possible mechanisms does not provide any specific basis for focusing on electric fields. While laboratory studies of electric fields are few, they do not indicate that electric fields should be the exposure of interest. The existing epidemiology on residential electric-field exposures and appliance use does not support the conclusion of adverse health effects from electric-field exposure. Workers in close proximity to high-voltage transmission lines or substation equipment can be exposed to high electric fields. While there are sporadic reports of increase in cancer in some occupational studies, these are inconsistent and fraught with methodologic problems. Overall, there seems little basis to suppose there might be a risk for electric fields, and, in contrast to magnetic fields, and with a possible exception of occupational epidemiology, there seems little basis for continued research into electric fields.

Incidence, predictors, and associated outcomes of prostatism after kidney transplantation.

BACKGROUND AND OBJECTIVES: Renal transplantation is increasingly performed in elderly patients, and the incidence of benign prostatic hyperplasia (BPH) increases with age. Anuric males on dialysis may have occult BPH and not develop obstructive symptoms until urine flow is restored after transplantation. If left untreated, BPH poses a risk for numerous complications, including acute urinary retention (AUR), recurrent urinary tract infections (UTI), and renal failure. The authors hypothesized that incident BPH after renal transplantation would adversely affect allograft survival. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: Medicare claims for BPH, AUR, UTI, and prostate resection procedures (transurethral resection of the prostate; TURP) were assessed in a retrospective cohort of 23,622 adult male Medicare primary renal transplant recipients in the United States Renal Data System database who received transplants from 1 January 2000 to 31 July 2005 and followed through 31 December 2005. RESULTS: The 3-yr incidence of BPH post-transplant was 9.7%. The incidences of AUR, UTI, and TURP after BPH diagnosis (up to 3 yr posttransplant) were 10.3%, 6.5%, and 7.3% respectively, and each was significantly associated with BPH. Cox regression analysis showed that recipient age per year, later year of transplant, and dialysis vintage were associated with incident BPH. Using Cox nonproportional hazards regression, BPH was significantly associated with renal allograft loss (including death). CONCLUSIONS: BPH is common in males after renal transplant and is independently associated with AUR, UTI, and graft loss. It is unknown whether treatment of BPH, either medical or surgical, attenuates these risks.

Methods used to calculate exposures in two epidemiological studies of power lines in the UK.

Two epidemiological studies of cancer (one for children and one for adults) and proximity to high-voltage power lines are being performed in the UK. We describe the methods used to calculate exposure to magnetic fields in these studies. We used grid references derived from addresses for subjects and compared these to the grid references of pylons to calculate distances to power lines. We gathered relevant data on the power lines and used these to calculate magnetic fields. This required information on loads in the years from 1962 to the present. The only such information now available is a prediction of loads made for each year in advance, and the use of predictions rather than actual loads is the biggest source of error in these calculations. For a recent year, we compare the loads used in these studies with actual loads to assess the accuracy of our calculations. These calculations were performed by industry, and we describe the steps taken to ensure their trustworthiness, including conducting them all blind to the case-control status of the subjects.

Power-frequency electric and magnetic fields in the light of Draper et al. 2005.

Power-frequency electric and magnetic fields are produced wherever electricity is used; exposure is ubiquitous. Epidemiologic studies find an association between children living in homes with the highest magnetic fields and childhood leukemia, but bias is a possible alternative to a causal explanation. A new study, Draper et al., looks at residence close to high-voltage power lines, one source of exposure to such fields, and its design avoids any obvious bias. It finds elevated childhood leukemia rates, but extending too far from the power lines to be straightforwardly compatible with the existing literature. This leads to an examination of alternative explanations: magnetic fields, other physical factors, such as corona ions, the characteristics of the areas power lines pass through, bias, and chance. The conclusion is that there is currently no single preferred explanation, but that this is a serious body of science that needs further work until an explanation is found.