Neurosurgical Academic Impact Rankings by h5-Index: A Global Perspective.

OBJECTIVE: Our aim was to assess the 5-year h-index (h5)-index by nation. We aimed to assess the relationship between a nation's h5-index and numbers of neurosurgeons, population, gross domestic product (GDP), and expenditure on both health and research. METHODS: Using Web of Science we collected data on each nation's h5-index and number of publications for the 5-year period 2016 to 2020. Neurosurgical data were collected from the global neurosurgical workforce map provided by the World Federation of Neurosurgical Societies. National economic data were collected from the World Bank Open Data provided. We analyzed how economic and neurosurgical factors correlated with h5-index and publication numbers. RESULTS: We report the top 28 countries ranked according to their h5-index. Regarding the h5-index the strongest positive relationship was found with GDP, proportion of GDP spent on health and total amount spent on health per capita. In regard to the total number of publications (2016 to 2020), the strongest positive relationship was found with GDP and total number of neurosurgeons. CONCLUSIONS: This is the first study to explore the h-index between nations on an international level. GDP and proportion of GDP spent on health expenditure are the strongest correlates of the h5-index. Although a higher number of neurosurgeons in a nation does result in more publications, this is not necessarily translated into higher quality research.

The public economic burden of suboptimal type 2 diabetes control upon taxpayers in Sweden: Looking beyond health costs.

AIM: To estimate the fiscal burden for taxpayers in Sweden associated with type 2 diabetes (T2D) attributed to diabetes-related complications in patients failing to meet HbA1c targets. MATERIAL AND METHODS: We developed a public economic framework to assess how changes in diabetes-related complications influenced projected tax contributions and government disability payments for people with T2D. The analysis applied accepted disease-modelling practices to estimate different rates of diabetes-related complications based on an HbA1c of 6.9% (52 mmol/mol) and of 6.0% (42 mmol/mol). We adjusted the employment activity rates for those experiencing T2D-related events, applying age-specific earnings to estimate lifetime tax losses. Furthermore, the likelihood of receiving payments for health-related employment inactivity was estimated. Direct healthcare costs are excluded from this analysis. RESULTS: The estimated per person earnings loss for immediate and delayed HbA1c control was Swedish krona (SEK) 42 299 and SEK 44 157, respectively, over 10 years. The lost employment activity of people with T2D translates to lost tax revenues of SEK 23 265 and SEK 24 287 for immediate and delayed control, respectively. The estimated difference in disability payments was SEK 538. Combining the tax revenue loss and excess disability payments defines the broader fiscal costs, where we observe combined fiscal losses that favour immediate and sustained control by SEK 1560 over 10 years. CONCLUSIONS: We show that conducting fiscal analysis of diabetes interventions offers an enriched perspective capturing a range of costs that fall on government in relation to lost tax revenue and disability payments. Tax-financed health systems may benefit from broadening the consideration of costs and benefits when evaluating new interventions and treatment practices.

Evaluating the Cost-Effectiveness of Once-Weekly Semaglutide 1 mg Versus Empagliflozin 25 mg for Treatment of Patients with Type 2 Diabetes in the UK Setting.

INTRODUCTION: Type 2 diabetes represents a continuing healthcare challenge, and choosing cost-effective treatments is crucial to ensure that healthcare resources are used efficiently. The present analysis assessed the cost-effectiveness of once-weekly semaglutide 1 mg versus empagliflozin 25 mg for the treatment of patients with type 2 diabetes mellitus with inadequate glycaemic control on metformin monotherapy from a healthcare payer perspective in the UK. METHODS: Outcomes were projected over patient lifetimes using the IQVIA CORE Diabetes Model. Baseline cohort characteristics and treatment effects of initiation of once-weekly semaglutide 1 mg and empagliflozin 25 mg were based on an indirect comparison conducted using patient-level data, as there is currently no head-to-head clinical trial comparing these therapies. Modelled patients received treatments until glycated haemoglobin exceeded 7.5% (58 mmol/mol), at which point patients initiated basal insulin. The analysis captured pharmacy costs and costs of diabetes-related complications, expressed in 2019 pounds sterling (GBP). Projected outcomes were discounted at 3.5% annually. Scenario analyses were prepared to assess uncertainty around projected outcomes. RESULTS: Once-weekly semaglutide 1 mg was associated with increases in life expectancy and quality-adjusted life expectancy of 0.12 years and 0.23 quality-adjusted life years (QALYs), respectively, compared with empagliflozin 25 mg. Projected improvements in quality and duration of life resulted from a reduced cumulative incidence and a delayed time to onset of diabetes-related complications. Once-weekly semaglutide was associated with increased pharmacy costs, but this was partially offset by avoided costs of treating complications. Once-weekly semaglutide was associated with an increase in costs of GBP 1017 per patient, leading to an incremental cost-effectiveness ratio of GBP 4439 per QALY gained. CONCLUSION: Once-weekly semaglutide 1 mg was projected to be a cost-effective treatment option from a healthcare payer perspective compared with empagliflozin 25 mg for the treatment of patients with type 2 diabetes in the UK setting.

The Economic Burden of Insulin-Related Hypoglycemia in Adults with Diabetes: An Analysis from the Perspective of the Italian Healthcare System.

INTRODUCTION: The aim of this analysis was to estimate the cost of insulin-related hypoglycemia in adult patients with diabetes in Italy using the Local Impact of Hypoglycemia Tool (LIHT), and to explore the effect of different hypoglycemia rates on budget impact. METHODS: Direct costs and healthcare resource utilization were estimated for severe and non-severe hypoglycemic episodes in Italy and applied to the population of adults with type 1 diabetes (T1DM) and type 2 diabetes (T2DM) and their corresponding hypoglycemia episode rates (0.49 severe and 53.3 non-severe episodes per year for T1DM, and 0.09 severe and 9.3 non-severe episodes per year for T2DM). Uncertainty around model inputs was explored through sensitivity and scenario analyses. RESULTS: The direct cost of insulin-related hypoglycemia in Italy is estimated at €144.7 million per year, with €65 million attributable to severe episodes and €79.6 million due to non-severe episodes. The total cost of hypoglycemia is approximately 1.7-fold higher for T2DM (€91.7 million) than for T1DM (€53 million). The cost of a hypoglycemic episode ranges from €4.59 for a non-severe event where additional self-monitoring of blood glucose (SMBG) testing is the only cost incurred, to €5790.59 for a severe event that also requires an ambulance, A&E, hospitalization, and a visit to a diabetes specialist. A reduction in hypoglycemia event rates could result in substantial cost savings; for example, a 20% reduction in severe and non-severe hypoglycemia rates could result in a saving of €47,769 per general population of 100,000 people. CONCLUSIONS: The LIHT highlights the substantial economic burden of insulin-related hypoglycemia in Italy, particularly with regards to non-severe hypoglycemia, an aspect of hypoglycemia that is often overlooked. This analysis may aid healthcare decision-making by allowing the costs of insulin therapies or diabetes self-management programs to be balanced with the savings provided by reductions in hypoglycemia. FUNDING: Novo Nordisk, UK.

The Economic Burden of Insulin-Related Hypoglycemia in Spain.

INTRODUCTION: An analysis was conducted to estimate the economic burden of insulin-related hypoglycemia in adults in Spain, derived from a novel concept developed for the UK known as the Local Impact of Hypoglycemia Tool. METHODS: Costs per severe and non-severe hypoglycemic episode were calculated for patients with type 1 diabetes (T1DM) and type 2 diabetes (T2DM). The costs per episode were applied to the population of adults with T1DM and T2DM using insulin in Spain according to the number of severe and non-severe episodes experienced per year. Costs were calculated using Spanish-specific resource costs and published values for resource utilization, including ambulance, accident and emergency (A&E) department, hospitalization, healthcare professional visits, and extra self-monitoring of blood glucose (SMBG) tests used in the week following the episode. A one-way sensitivity analysis on all model inputs was then performed. RESULTS: The cost of insulin-related hypoglycemia in Spain is estimated as €662.0 m per year, €292.6 m of which is due to severe episodes and €369.4 m to non-severe episodes. The cost per episode varies from €1.25 for patients with T1DM and €1.48 for patients with T2DM for a non-severe episode where extra SMBG testing after the episode is the only action taken, to €4378.22 for T1DM and €3005.74 for T2DM for a severe episode that was treated in hospital and requires an ambulance, A&E visit, hospitalization, and a diabetes specialist visit. A reduction in severe and non-severe hypoglycemia rates of just 20% could lead to considerable cost savings of €284,925 per 100,000 general population. CONCLUSION: This analysis highlights the substantial economic burden of hypoglycemia in Spain, and gives budget holders the ability to assess the costs of new treatments or patient education programs in relation to the potential cost savings due to lower hypoglycemia rates.

NHS litigation in bariatric surgery over a ten year period.

Negligence claims in the UK NHS has increased over the last 30 years. The aim of this present study was determine the number of claims and the cost of litigation in Bariatric Surgery and compare it to similar other specialties. Data was received from NHS Litigation Authority (NHSLA) in response to Freedom of Information data request. There was a total of 7 claims, of which 4 were successful. The total pay out sum was £210,000 in 10 years. This is a very low amount compared to other surgical specialties. This low level of litigation probably indicates that the current bariatric surgical services in the NHS are delivering safe care with good patient satisfaction. This needs to be carefully considered prior to changing the payment tariffs for bariatric surgery.

Robust reinforcement learning control using integral quadratic constraints for recurrent neural networks.

The applicability of machine learning techniques for feedback control systems is limited by a lack of stability guarantees. Robust control theory offers a framework for analyzing the stability of feedback control loops, but for the integral quadratic constraint (IQC) framework used here, all components are required to be represented as linear, time-invariant systems plus uncertainties with, for IQCs used here, bounded gain. In this paper, the stability of a control loop including a recurrent neural network (NN) is analyzed by replacing the nonlinear and time-varying components of the NN with IQCs on their gain. As a result, a range of the NN's weights is found within which stability is guaranteed. An algorithm is demonstrated for training the recurrent NN using reinforcement learning and guaranteeing stability while learning.

Genome sequencing in microfabricated high-density picolitre reactors.

The proliferation of large-scale DNA-sequencing projects in recent years has driven a search for alternative methods to reduce time and cost. Here we describe a scalable, highly parallel sequencing system with raw throughput significantly greater than that of state-of-the-art capillary electrophoresis instruments. The apparatus uses a novel fibre-optic slide of individual wells and is able to sequence 25 million bases, at 99% or better accuracy, in one four-hour run. To achieve an approximately 100-fold increase in throughput over current Sanger sequencing technology, we have developed an emulsion method for DNA amplification and an instrument for sequencing by synthesis using a pyrosequencing protocol optimized for solid support and picolitre-scale volumes. Here we show the utility, throughput, accuracy and robustness of this system by shotgun sequencing and de novo assembly of the Mycoplasma genitalium genome with 96% coverage at 99.96% accuracy in one run of the machine.