Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μμbb and ττbb final states

A search for exotic decays of the Higgs boson (H ) with a mass of 125Ge V to a pair of light pseudoscalars a 1 is performed in final states where one pseudoscalar decays to two b quarks and the other to a pair of muons or τ leptons. A data sample of proton-proton collisions at s = 13 Te V corresponding to an integrated luminosity of 138fb - 1 recorded with the CMS detector is analyzed. No statistically significant excess is observed over the standard model backgrounds. Upper limits are set at 95% confidence level (CL ) on the Higgs boson branching fraction to μ μ b b and to τ τ b b , via a pair of a 1 s. The limits depend on the pseudoscalar mass m a 1 and are observed to be in the range (0.17-3.3) × 10 - 4 and (1.7-7.7) × 10 - 2 in the μ μ b b and τ τ b b final states, respectively. In the framework of models with two Higgs doublets and a complex scalar singlet (2HDM+S), the results of the two final states are combined to determine upper limits on the branching fraction B ( H → a 1 a 1 → ℓ ℓ b b ) at 95% CL , with ℓ being a muon or a τ lepton. For different types of 2HDM+S, upper bounds on the branching fraction B ( H → a 1 a 1 ) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B ( H → a 1 a 1 ) values above 0.23 are excluded at 95% CL for m a 1 values between 15 and 60Ge V .

Observation of WWγ Production and Search for Hγ Production in Proton-Proton Collisions at sqrt[s]=13 TeV

The observation of WWγ production in proton-proton collisions at a center-of-mass energy of 13 TeV with an integrated luminosity of 138  fb^{-1} is presented. The observed (expected) significance is 5.6 (5.1) standard deviations. Events are selected by requiring exactly two leptons (one electron and one muon) of opposite charge, moderate missing transverse momentum, and a photon. The measured fiducial cross section for WWγ is 5.9±0.8(stat)±0.8(syst)±0.7(modeling)  fb, in agreement with the next-to-leading order quantum chromodynamics prediction. The analysis is extended with a search for the associated production of the Higgs boson and a photon, which is generated by a coupling of the Higgs boson to light quarks. The result is used to constrain the Higgs boson couplings to light quarks.

New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at sqrt[s]=13 TeV

A search is reported for near-threshold structures in the J/ψJ/ψ invariant mass spectrum produced in proton-proton collisions at sqrt[s]=13  TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135  fb^{-1}. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638_{-38}^{+43}(stat)_{-31}^{+16}(syst)  MeV. Another structure with even higher significance is found at a mass of 6847_{-28}^{+44}(stat)_{-20}^{+48}(syst)  MeV, which is consistent with the X(6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134_{-25}^{+48}(stat)_{-15}^{+41}(syst)  MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.

Search for Scalar Leptoquarks Produced via τ-Lepton-Quark Scattering in pp Collisions at sqrt[s]=13 TeV

The first search for scalar leptoquarks produced in τ-lepton-quark collisions is presented. It is based on a set of proton-proton collision data recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 138  fb^{-1}. The reconstructed final state consists of a jet, significant missing transverse momentum, and a τ lepton reconstructed through its hadronic or leptonic decays. Limits are set on the product of the leptoquark production cross section and branching fraction and interpreted as exclusions in the plane of the leptoquark mass and the leptoquark-τ-quark coupling strength.

Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at sqrt[s]=13 TeV

A search for dark matter in events with a displaced nonresonant muon pair and missing transverse momentum is presented. The analysis is performed using an integrated luminosity of 138  fb^{-1} of proton-proton (pp) collision data at a center-of-mass energy of 13 TeV produced by the LHC in 2016-2018. No significant excess over the predicted backgrounds is observed. Upper limits are set on the product of the inelastic dark matter production cross section σ(pp→A^{'}→χ_{1}χ_{2}) and the decay branching fraction B(χ_{2}→χ_{1}μ^{+}μ^{-}), where A^{'} is a dark photon and χ_{1} and χ_{2} are states in the dark sector with near mass degeneracy. This is the first dedicated collider search for inelastic dark matter.

Luminosity determination using Z boson production at the CMS experiment

The measurement of Z boson production is presented as a method to determine the integrated luminosity of CMS data sets. The analysis uses proton-proton collision data, recorded by the CMS experiment at the CERN LHC in 2017 at a center-of-mass energy of 13Te V . Events with Z bosons decaying into a pair of muons are selected. The total number of Z bosons produced in a fiducial volume is determined, together with the identification efficiencies and correlations from the same data set, in small intervals of 20pb - 1 of integrated luminosity, thus facilitating the efficiency and rate measurement as a function of time and instantaneous luminosity. Using the ratio of the efficiency-corrected numbers of Z bosons, the precisely measured integrated luminosity of one data set is used to determine the luminosity of another. For the first time, a full quantitative uncertainty analysis of the use of Z  bosons for the integrated luminosity measurement is performed. The uncertainty in the extrapolation between two data sets, recorded in 2017 at low and high instantaneous luminosity, is less than 0.5%. We show that the Z boson rate measurement constitutes a precise method, complementary to traditional methods, with the potential to improve the measurement of the integrated luminosity.

Measurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at s=13TeV

The strange quark content of the proton is probed through the measurement of the production cross section for a W boson and a charm (c) quark in proton-proton collisions at a center-of-mass energy of 13Te V . The analysis uses a data sample corresponding to a total integrated luminosity of 138fb - 1 collected with the CMS detector at the LHC. The W bosons are identified through their leptonic decays to an electron or a muon, and a neutrino. Charm jets are tagged using the presence of a muon or a secondary vertex inside the jet. The W + c production cross section and the cross section ratio R c ± = σ ( W + + c ¯ ) / σ ( W - + c ) are measured inclusively and differentially as functions of the transverse momentum and the pseudorapidity of the lepton originating from the W boson decay. The precision of the measurements is improved with respect to previous studies, reaching 1% in R c ± = 0.950 ± 0.005 (stat) ± 0.010 (syst) . The measurements are compared with theoretical predictions up to next-to-next-to-leading order in perturbative quantum chromodynamics.

Probing Small Bjorken-x Nuclear Gluonic Structure via Coherent J/ψ Photoproduction in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV

Quasireal photons exchanged in relativistic heavy ion interactions are powerful probes of the gluonic structure of nuclei. The coherent J/ψ photoproduction cross section in ultraperipheral lead-lead collisions is measured as a function of photon-nucleus center-of-mass energies per nucleon (W_{γN}^{Pb}) over a wide range of 40 Collapse

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Methodological Issues with Head and Neck Cancer Prognostic Risk Prediction Models

OBJECTIVE

Prognostic risk prediction models estimate the probability of developing head and neck cancer (HNC), providing valuable information for managing the disease. While different prognostic HNC risk prediction models have been developed worldwide, a comprehensive evaluation of their methods is lacking. We conducted a scoping review with a critical assessment aiming to identify the methodological strengths and limitations of HNC risk prediction models.

METHOD

We searched Medline, Embase, Scopus, Web of Science, and CAB Abstracts databases and included full-text-available peer-reviewed published papers on developing or validating a prognostic HNC risk prediction model. Study quality was appraised using the PROBAST tool.

RESULTS

Nine papers were included. Although all had a high risk of bias, mainly in the analysis domain, only two studies had high concerns about clinical applicability.

CONCLUSION

Currently published studies provide insufficient information on methods, making it difficult to judge the models' quality and applicability. Future investigations should follow the guidelines in reporting the prediction modelling studies.

Measurement of the top quark mass using a profile likelihood approach with the lepton + jets final states in proton-proton collisions at s=13TeV

The mass of the top quark is measured in 36.3fb - 1 of LHC proton-proton collision data collected with the CMS detector at s = 13 Te V . The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied using up to four observables per event to extract the top quark mass. The top quark mass is measured to be 171.77 ± 0.37 Ge V . This approach significantly improves the precision over previous measurements.

A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at s=13TeV

A search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has been performed using proton-proton collision data collected at s = 13 Te V by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138fb - 1 . The 95% confidence level upper limit set on the branching fraction of the 125Ge V Higgs boson to invisible particles, B ( H → inv ) , is 0.54 (0.39 expected), assuming standard model production cross sections. The results of this analysis are combined with previous B ( H → inv ) searches carried out at s = 7 , 8, and 13Te V in complementary production modes. The combined upper limit at 95% confidence level on B ( H → inv ) is 0.15 (0.08 expected).

Observation of τ Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV

We present an observation of photon-photon production of τ lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404  μb^{-1} collected by the CMS experiment at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02  TeV. The γγ→τ^{+}τ^{-} process is observed for τ^{+}τ^{-} events with a muon and three charged hadrons in the final state. The measured fiducial cross section is σ(γγ→τ^{+}τ^{-})=4.8±0.6(stat)±0.5(syst)  μb, where the second (third) term corresponds to the statistical (systematic) uncertainty in σ(γγ→τ^{+}τ^{-}) in agreement with leading-order QED predictions. Using σ(γγ→τ^{+}τ^{-}), we estimate a model-dependent value of the anomalous magnetic moment of the τ lepton of a_{τ}=0.001_{-0.089}^{+0.055}.

Characterizing individual trainee learning curves in surgical training: Challenges and opportunities

The surgical learning curve is an observable and measurable phenomenon. In the era of competency-based approaches to surgical training, monitoring the trajectory of individual trainee competence attainment could represent a meaningful method of formative and summative assessment. While technology can assist this approach, a number of significant barriers to the implementation of such assessment methods remain, including: accurate data collection, standard setting, and reliable assessment. Translating individual learning curve data into quantifiable case minimum targets in training poses further difficulties, and may not be possible for all procedures, particularly those that are less frequently performed and assessed. In spite of these challenges, significant benefits could be realized through an individualized approach to competency assessment using trainee learning curve data. Tracking competence acquisition against criterion-referenced standards could allow for targeted training and remediation, conforming with modern theories of adult education and empowering trainees to take control of their own learning. Learning curve data could also be used to assess the effects of educational interventions such as simulation-based training on subsequent competence acquisition rates. Ultimately, the individual learning curves of trainees could be used to inform personalised decisions regarding entrustment, credentialing, and certification, allowing training programmes to move beyond minimum operative experience targets as a crude proxy measure of competence.

A Pilot Study of Stereotactic Body Radiotherapy and 177Lu-PSMA-617 for Oligometastatic Hormone Sensitive Prostate Cancer

PURPOSE/OBJECTIVE(S)

Stereotactic body radiotherapy (SBRT) is increasingly used for oligorecurrent prostate cancer (OPC). Despite excellent local control, distant metastasis free survival rates are more modest. We hypothesized SBRT outcomes could be optimized with improved staging imaging and integration of a well-tolerated targeted radiopharmaceutical therapy (RLT) for microscopic disease. We report initial results of a prospective, single-institution pilot (NCT05079698) of a novel, PSMA-based theranostic strategy for OPC.

MATERIALS/METHODS

Men with castrate sensitive OPC and 1-3 sites of PSMA PET avid disease ("index lesions") and no PSMA non-avid sites were eligible. No androgen deprivation therapy was permitted. Subjects first received 2 cycles of 177Lu-PSMA-617 RLT (7.47±0.14 GBq) spaced 6 weeks apart. In vivo dosimetry was performed during cycle 1. Four weeks post-cycle 2, patients were restaged with 68Ga-PSMA PET for an interim (post-RLT) response assessment. Index lesions were then consolidated with SBRT (9 Gy x 3) irrespective of post-RLT PET response. The primary outcome was feasibility defined as successful completion of protocol-mandated therapy without intercurrent distant failure on post-RLT PET.

RESULTS

Six men were treated with nine total index lesions (5 nodal, 3 osseous, 1 visceral). The study met its primary endpoint; all completed required interventions and no distant progression was seen on interim PSMA PET. Treatment was well tolerated; no grade 3+ toxicities, 2/6 had grade 2 toxicities (transient anemia and hyperbilirubinemia) and 5/6 had grade 1 toxicities. Median baseline lesion-level PSMA SUVmax was 16.8±8.7. Median interim SUVmax was 6.2±2.5 and declined for all but one lesion post-RLT (median -65%). Median SUVmax at 3-mos post-SBRT was 3.3±2.5 and decreased for all evaluable lesions (median -80%). Median baseline PSA was 2.01 ng/mL (range: 0.72-4.56) which declined in 5/6 post-RLT. The 6th patient experienced biochemical rise with interim PET showing only greater avidity in the known index lesion and SBRT was completed per protocol. All 4 evaluable patients with at least one post-SBRT follow-up have improved PSA at last visit (range 5.5-12 mos from cycle 1), and 2/4 have undetectable PSA. Composite dosimetry, correlatives and quality of life studies are forthcoming.

CONCLUSION

Our pilot study demonstrates the feasibility of a novel PSMA anchored theranostic strategy combining SBRT with targeted RLT for OPC. Preliminary data suggests promising outcomes, including the possibility of achieving an undetectable biochemical disease state without hormone therapy.

Measurement of the Dependence of the Hadron Production Fraction Ratios f_{s}/f_{u} and f_{d}/f_{u} on B Meson Kinematic Variables in Proton-Proton Collisions at sqrt[s]=13 TeV

The dependence of the ratio between the B_{s}^{0} and B^{+} hadron production fractions, f_{s}/f_{u}, on the transverse momentum (p_{T}) and rapidity of the B mesons is studied using the decay channels B_{s}^{0}→J/ψϕ and B^{+}→J/ψK^{+}. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6  fb^{-1}. The f_{s}/f_{u} ratio is observed to depend on the B p_{T} and to be consistent with becoming asymptotically constant at large p_{T}. No rapidity dependence is observed. The ratio of the B^{0} to B^{+} meson production fractions, f_{d}/f_{u}, is also measured, for the first time in proton-proton collisions, using the B^{0}→J/ψK^{*0} decay channel. The result is found to be within 1 standard deviation of unity and independent of p_{T} and rapidity, as expected from isospin invariance.

Search for Exotic Higgs Boson Decays H→AA→4γ with Events Containing Two Merged Diphotons in Proton-Proton Collisions at sqrt[s]=13 TeV

We present the first direct search for exotic Higgs boson decays H→AA, A→γγ in events with two photonlike objects. The hypothetical particle A is a low-mass spin-0 particle decaying promptly to a merged diphoton reconstructed as a single photonlike object. We analyze the data collected by the CMS experiment at sqrt[s]=13  TeV corresponding to an integrated luminosity of 136  fb^{-1}. No excess above the estimated background is found. We set upper limits on the branching fraction B(H→AA→4γ) of (0.9-3.3)×10^{-3} at 95% confidence level for masses of A in the range 0.1-1.2 GeV.

Observation of Same-Sign WW Production from Double Parton Scattering in Proton-Proton Collisions at sqrt[s]=13 TeV

The first observation of the production of W^{±}W^{±} bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 138  fb^{-1} recorded at a center-of-mass energy of 13 TeV using the CMS detector at the CERN LHC. Multivariate discriminants are used to distinguish the signal process from the main backgrounds. A binned maximum likelihood fit is performed to extract the signal cross section. The measured cross section for production of same-sign W bosons decaying leptonically is 80.7±11.2(stat) _{-8.6}^{+9.5}(syst)±12.1(model)  fb, whereas the measured fiducial cross section is 6.28±0.81(stat)±0.69(syst)±0.37(model)  fb. The observed significance of the signal is 6.2 standard deviations above the background-only hypothesis.

Observation of the Rare Decay of the η Meson to Four Muons

A search for the rare η→μ^{+}μ^{-}μ^{+}μ^{-} double-Dalitz decay is performed using a sample of proton-proton collisions, collected by the CMS experiment at the CERN LHC with high-rate muon triggers during 2017 and 2018 and corresponding to an integrated luminosity of 101  fb^{-1}. A signal having a statistical significance well in excess of 5 standard deviations is observed. Using the η→μ^{+}μ^{-} decay as normalization, the branching fraction B(η→μ^{+}μ^{-}μ^{+}μ^{-})=[5.0±0.8(stat)±0.7(syst)±0.7(B_{2μ})]×10^{-9} is measured, where the last term is the uncertainty in the normalization channel branching fraction. This work achieves an improved precision of over 5 orders of magnitude compared to previous results, leading to the first measurement of this branching fraction, which is found to agree with theoretical predictions.

Search for Higgs Boson Decay to a Charm Quark-Antiquark Pair in Proton-Proton Collisions at sqrt[s]=13 TeV

A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H→cc[over ¯], produced in association with a leptonically decaying V (W or Z) boson is presented. The search is performed with proton-proton collisions at sqrt[s]=13  TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138  fb^{-1}. Novel charm jet identification and analysis methods using machine learning techniques are employed. The analysis is validated by searching for Z→cc[over ¯] in VZ events, leading to its first observation at a hadron collider with a significance of 5.7 standard deviations. The observed (expected) upper limit on σ(VH)B(H→cc[over ¯]) is 0.94 (0.50_{-0.15}^{+0.22})pb at 95% confidence level (C.L.), corresponding to 14 (7.6_{-2.3}^{+3.4}) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, κ_{c}, the observed (expected) 95% C.L. interval is 1.1<|κ_{c}|<5.5 (|κ_{c}|<3.4), the most stringent constraint to date.

Search for Nonresonant Pair Production of Highly Energetic Higgs Bosons Decaying to Bottom Quarks

A search for nonresonant Higgs boson (H) pair production via gluon and vector boson (V) fusion is performed in the four-bottom-quark final state, using proton-proton collision data at 13 TeV corresponding to 138  fb^{-1} collected by the CMS experiment at the LHC. The analysis targets Lorentz-boosted H pairs identified using a graph neural network. It constrains the strengths relative to the standard model of the H self-coupling and the quartic VVHH couplings, κ_{2V}, excluding κ_{2V}=0 for the first time, with a significance of 6.3 standard deviations when other H couplings are fixed to their standard model values.

Search for Higgs Boson and Observation of Z Boson through Their Decay into a Charm Quark-Antiquark Pair in Boosted Topologies in Proton-Proton Collisions at sqrt[s]=13 TeV

A search for the standard model (SM) Higgs boson (H) produced with transverse momentum (p_{T}) greater than 450 GeV and decaying to a charm quark-antiquark (cc[over ¯]) pair is presented. The search is performed using proton-proton collision data collected at sqrt[s]=13  TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138  fb^{-1}. Boosted H→cc[over ¯] decay products are reconstructed as a single large-radius jet and identified using a deep neural network charm tagging technique. The method is validated by measuring the Z→cc[over ¯] decay process, which is observed in association with jets at high p_{T} for the first time with a signal strength of 1.00_{-0.14}^{+0.17}(syst)±0.08(theo)±0.06(stat), defined as the ratio of the observed process rate to the SM expectation. The observed (expected) upper limit on σ(H)B(H→cc[over ¯]) is set at 47 (39) times the SM prediction at 95% confidence level.

Measurements of the Higgs boson production cross section and couplings in the W boson pair decay channel in proton-proton collisions at s=13TeV

Production cross sections of the standard model Higgs boson decaying to a pair of W bosons are measured in proton-proton collisions at a center-of-mass energy of 13Te V . The analysis targets Higgs bosons produced via gluon fusion, vector boson fusion, and in association with a W or Z boson. Candidate events are required to have at least two charged leptons and moderate missing transverse momentum, targeting events with at least one leptonically decaying W boson originating from the Higgs boson. Results are presented in the form of inclusive and differential cross sections in the simplified template cross section framework, as well as couplings of the Higgs boson to vector bosons and fermions. The data set collected by the CMS detector during 2016-2018 is used, corresponding to an integrated luminosity of 138fb - 1 . The signal strength modifier μ , defined as the ratio of the observed production rate in a given decay channel to the standard model expectation, is measured to be μ = 0 . 95 - 0.09 + 0.10 . All results are found to be compatible with the standard model within the uncertainties.

Probing Heavy Majorana Neutrinos and the Weinberg Operator through Vector Boson Fusion Processes in Proton-Proton Collisions at sqrt[s]=13 TeV

The first search exploiting the vector boson fusion process to probe heavy Majorana neutrinos and the Weinberg operator at the LHC is presented. The search is performed in the same-sign dimuon final state using a proton-proton collision dataset recorded at sqrt[s]=13  TeV, collected with the CMS detector and corresponding to a total integrated luminosity of 138  fb^{-1}. The results are found to agree with the predictions of the standard model. For heavy Majorana neutrinos, constraints on the squared mixing element between the muon and the heavy neutrino are derived in the heavy neutrino mass range 50 GeV-25 TeV; for masses above 650 GeV these are the most stringent constraints from searches at the LHC to date. A first test of the Weinberg operator at colliders provides an observed upper limit at 95% confidence level on the effective μμ Majorana neutrino mass of 10.8 GeV.

Measurement of the differential tt¯ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks

A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production (t t ¯ ) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400Ge V . The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138fb - 1 . The differential t t ¯ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06 ± 0.84 Ge V .

Clinical portfolios as a tool to develop competence in radiography education

INTRODUCTION

Clinical portfolios are used in healthcare programmes to prepare students for their professional careers by promoting reflective practice and critical thinking. There is a paucity of research related to students' and educators' perceptions of the effectiveness of clinical portfolios in radiography education.

METHODS

A cross-sectional, questionnaire-based study was conducted to explore radiography students' and educators' opinions on the contribution of portfolios to students' personal and professional development. Optimal portfolio content and administration was investigated. Questionnaires were distributed to a stratified sample of second-, third- and fourth-year undergraduate radiography students and recent graduates from a 4-year BSc Radiography program in Ireland. A second questionnaire was sent to academic staff involved in clinical education. Participation was on a voluntary basis and data anonymous.

RESULTS

Sixty participants provided the student perspective and seven provided the educator perspective. All educators and most radiography students (58-83%) agreed that the portfolio contributed effectively to personal and professional development. Tutor feedback and competency assessments were ranked the most valuable elements of the portfolio by both students and educators. The remainder content ranked from most to least beneficial were; image appraisal assignments, self-reflection, training needs analysis and modality objective lists. Final-year students and new graduates valued self-reflections more than novice students. Online portfolio administration was preferred over paper administration (5:3) due to greater efficiency, accessibility, and interactivity.

CONCLUSION

The clinical portfolio was perceived to be an effective tool for developing competence in radiography education. Study findings may be used to optimise radiography clinical portfolio design and administration.

IMPLICATIONS FOR PRACTICE

This study is the first to highlight elements of a clinical portfolio deemed most effective in competence development from the perspective of radiography students and educators.

Improving the quality of translation for patients with language barriers

Background

Patients with language barriers have worse health outcomes. To promote equitable care, efforts must be made to ensure effective communication with patients, including providing professional translation. In a busy, overstretched health service this can be difficult to achieve. Language translators can reduce barriers, improve safety and ensure impartiality.

Description of the Problem

Aims - To understand the quality of translation and explore interventions that could improve this in a busy diverse hospital in East London.

Methods

A quality improvement project in the Medical Admissions Unit of the Royal London Hospital was completed over two years. Patients with language barriers were identified, methods of translation were analysed and interventions to improve access to independent translation were introduced.

Results

Cycle 1- All medical admissions over a two-week period were analysed. 36 patients had documented evidence of a language barrier with 7 (19.4%) having independent professional translation. 20 (55.6%) patients had family members providing translation, for 4 patients limited English was used and previous documentation was used for 3 patients.

Cycle 2- Posters and information leaflets were disseminated regarding how to access translation services. There was no improvement in the types of translation used. Only 1 patient had impartial professional translation, out of 43 patients identified.

Cycle 3- Advocates (Bengali speaking professional translators) were made available on the ward twice a week. Results showed no significant improvement, with only 6 (10%) identified having impartial professional translation. However staff and patient feedback has been positive.

Lessons

Impartial professional translation is essential in reducing barriers and delivering equitable health care. This can be difficult to achieve in busy healthcare services. Education alone is not enough. Good accessibility to translation services is paramount in promoting usage.

Key messages

• Healthcare services often fall short of providing impartial professional translation.

• Education alone is not enough. Good accessibility to translation services is paramount in promoting usage.

Exploring the link between cancer policies and cancer survival: a comparison of seven countries

Background

Disparity in cancer survival across countries has been linked to variation in cancer policy delivery but there is lack of empirical evidence for this association. We traced the evolution of cancer policies in 20 jurisdictions in Australia, Canada, Denmark, Ireland, Norway, New Zealand and the UK since 1995 and present the findings of an exploratory analysis linking cancer policy consistency to cancer survival.

Methods

We systematically searched and analysed national/regional cancer plans and strategies, mapping timelines of cancer policy evolution. For 10 jurisdictions, evidence was synthesised into five categories: oversight function; cancer plan; implementation plan; budget for plan implementation; and evaluation. We assigned scores evaluating whether a category was present or absent, and weighted scores for consistency. Summed scores were correlated with trends in survival from seven cancers between 1995-2014.

Results

All ten jurisdictions had implemented a high-level structure overseeing, steering or delivering cancer control policies (1995 - 2014); all had also published at least one major cancer plan. There was great variation in oversight mechanisms, ranging from institutionalising cancer control (New South Wales, Ontario) to cancer steering groups or taskforces (Denmark, Northern Ireland, Wales). Frequency and consistency of cancer plans also varied, from a succession of plans that build on each other (Denmark, New South Wales, Ontario) to the publication of isolated plans (New Zealand, Northern Ireland). We found a positive, albeit weak, correlation of cancer policy consistency and improvements in survival over time for six of the seven cancers.

Conclusions

Jurisdictions that have implemented consistent cancer control policies over time tended to be more successful in improving survival for a wide range of cancers. Our findings can help guide policymakers seeking approaches and frameworks to improve cancer services and, ultimately, cancer outcomes.

Key messages

• Sustained and consistent strategic cancer planning and investment are crucial for ensuring better patient outcomes, and this requires strong and sustained commitment at all levels.

• The findings can help guide policymakers seeking approaches and frameworks to improve cancer services and, ultimately, cancer outcomes.

774 Operative Experience Targets in General Surgery Training: A Systematic Review

Aim

Operative experience targets are well established as a proxy measure for operative competence in surgical training across jurisdictions. The aim of this study was to examine the validity evidence of operative experience targets in surgical training as an assessment tool.

Method

A systematic review of the PubMed, EMBASE, Web of Science and Cochrane library databases was conducted in accordance with the PRISMA guidelines. The educational impact of included studies was evaluated using a modified Kirkpatrick model.

Results

Of 3,672 records identified on database searching, 11 papers were ultimately included in a narrative synthesis. Two studies reported a positive relationship between operative experience and self-reported confidence only (Kirkpatrick level 2a). Six studies documented improvements in assessed trainee performance associated with experience (Kirkpatrick level 2b). No study documented trainee behavioural change, or changes in organisational practice, related to experience targets (Kirkpatrick level 3 and 4a). No studies have identified an association between trainees reaching mandated experience targets and improved clinical outcomes.

Conclusions

Definitive evidence comparing either clinical or assessment outcomes for trainees who have reached pre-defined experience targets compared to those who have not is lacking. A number of studies have recorded competent trainee performance in key index procedures only after reaching experience thresholds greatly in excess of currently mandated targets in Ireland and the United Kingdom. This review supports the move away from these targets toward objective assessor-mediated measures of trainee competence.

A portrait of the Higgs boson by the CMS experiment ten years after the discovery

In July 2012, the ATLAS and CMS collaborations at the CERN Large Hadron Collider announced the observation of a Higgs boson at a mass of around 125 gigaelectronvolts. Ten years later, and with the data corresponding to the production of a 30-times larger number of Higgs bosons, we have learnt much more about the properties of the Higgs boson. The CMS experiment has observed the Higgs boson in numerous fermionic and bosonic decay channels, established its spin-parity quantum numbers, determined its mass and measured its production cross-sections in various modes. Here the CMS Collaboration reports the most up-to-date combination of results on the properties of the Higgs boson, including the most stringent limit on the cross-section for the production of a pair of Higgs bosons, on the basis of data from proton-proton collisions at a centre-of-mass energy of 13 teraelectronvolts. Within the uncertainties, all these observations are compatible with the predictions of the standard model of elementary particle physics. Much evidence points to the fact that the standard model is a low-energy approximation of a more comprehensive theory. Several of the standard model issues originate in the sector of Higgs boson physics. An order of magnitude larger number of Higgs bosons, expected to be examined over the next 15 years, will help deepen our understanding of this crucial sector.

Patients undergoing colorectal surgery at a Veterans Affairs Hospital do not experience racial disparity in length of stay either before or after implementing an enhanced recovery pathway

Background

Enhanced Recovery Pathways (ERP) have been shown to reduce racial disparities following surgery. The objective of this study is to determine whether ERP implementation mitigates racial disparities at a Veterans Affairs Hospital.

Methods

A retrospective cohort study was conducted using data obtained from the Veterans Affairs Surgical Quality Improvement Program. All patients undergoing elective colorectal surgery following ERP implementation were included. Current procedural terminology (CPT) codes were used to identify patients who underwent similar procedures prior to ERP implementation.

Results

Our study included 417 patients (314 pre-ERP vs. 103 ERP), 97.1% of which were male, with an average age of 62.32 (interquartile range (IQR): 25–90). ERP patients overall had a significantly shorter post-operative length of stay (pLOS) vs. pre-ERP patients (median 4 days (IQR: 3–6.5) vs. 6 days (IQR: 4–9) days (p < 0.001)). Within the pre-ERP group, median pLOS for both races was 6 days (IQR: 4–6; p < 0.976) and both groups experienced a decrease in median pLOS (4 vs. 6 days; p < 0.009 and p < 0.001) following ERP implementation.

Conclusions

Racial disparities did not exist in patients undergoing elective surgery at a single VA Medical Center. Implementation of an ERP significantly reduced pLOS for black and white patients.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12893-022-01647-3.

Severe Isolated Cardiomyopathy Requiring Heart Transplant Following COVID-19 Infection and Subsequent Vaccination

Introduction

Cardiomyopathy is a known complication associated with COVID-19, and 7% of all COVID-19 related deaths are thought to be due to myocarditis. There is also growing evidence for COVID-19 vaccine-related myocarditis. We present the first case of a patient with severe isolated cardiomyopathy requiring heart transplant after both COVID-19 infection and vaccination.

Case Report

A 58-year-old male with no prior medical history was diagnosed with COVID-19 infection in December 2020 without hospitalization. He experienced declining symptoms over the next 7 months and completed COVID-19 vaccination in July. On 8/10/2021, he presented to the emergency room with worsening exertional dyspnea and orthopnea. Initial labs revealed elevated NT-proBNP (1,701 pg/mL) and high-sensitivity cardiac troponin-T (45 ng/L). Transthoracic echocardiography revealed reduced left ventricular (LV) ejection fraction at 15% and LV end-diastolic diameter at 5.6 cm. Coronaries were clear. Cardiac MRI (cMR) is depicted in Figure 1. He was managed with an Impella device and dobutamine but failed weaning from this cardiac support. He was listed for transplant as UNOS Status 2 and underwent successful OHT on 9/19/2021.

Summary

Acute myocardial injury is known to be a frequent complication during the COVID-19 course, but it is not known to require advanced therapies. There is only one other case from France that describes a patient bridged with temporary mechanical support to OHT following COVID-19 induced cardiomyopathy. In both cases, cMR revealed similar late gadolinium enhancement (LGE) patterns. The cases differ as our patient experienced Long COVID symptoms over 8 months after diagnosis and was vaccinated while the French report describes a patient who was diagnosed with COVID-19, experienced end-stage heart failure and underwent transplant all within 11 days. This case contributes to the lacunae in data in the era of COVID-19 and its vaccines.

Acute ingestion of a high-fructose drink impairs vascular autonomic modulation and reflex control of blood pressure in first-degree relatives of diabetic patients

First-degree relatives of diabetes patients, despite being euglycemic, presented impaired BRS and exacerbation of sympathetic modulation after ingestion of a high fructose drink when challenged to orthostatic stress. This finding alerts the importance of early autonomic dysfunction even in clinically healthy people, especially in face of a stressful situation.

Cabozantinib as the causative agent of high-grade fever in a patient with a background of metastatic clear cell renal cell carcinoma: a case report

Background

Fever, as an adverse event, is well documented in a wide array of drugs including multiple tyrosine kinase inhibitors however, it is not a previously well described consequence of the novel multi-targeted tyrosine kinase inhibitor, cabozantinib.

Case presentation

In this paper we document the first detailed review of high-grade fevers in a 54 year old male (Caucasian) with a background of metastatic clear cell renal cell carcinoma recently commenced on cabozantinib. After detailed investigation, we exclude infection and other common causes of fever as the causative agent and further, definitively resolve the recurrent fever by ceasing cabozantinib and starting a short course of oral corticosteroids.

Conclusions

We have demonstrated that cabozantinib should always be considered in the aetiology of high-grade fever in relevant patients. Further, we demonstrate that temporary cessation of cabozantinib and a course of short-term steroids can induce resolution of fever and allow for recommencement of cabozantinib safely thereafter.

The role of leadership in driving change in cancer survival outcomes in seven high income countries

Background

There is well-established variation in cancer survival across high-income countries with seemingly-similar health systems. There is much research on reasons for these differences, but the role of leadership has been under-researched despite being one of the WHO 'building blocks' that underpin a functioning health system. Leadership is variously defined as including governance, stewardship, responsibility and accountability. As part of the International Cancer Benchmarking Partnership, this study looked at these diverse aspects of leadership to identify drivers of change and improvement across a range of high-income countries.

Methods

Cancer strategy documents were analysed from 22 jurisdictions: Australia (3 states), Canada (10 provinces), Denmark, Ireland, New Zealand, Norway, and UK (4 countries). Key informants in 15 of these jurisdictions, representing a range of stakeholders, were recruited through a combination of purposive and 'snowball' strategies, and invited to participate in semi-structured interviews. Documents and interview transcripts were analysed using a thematic approach.

Results

Different facets of leadership emerged: diffused vs centralised (including the central role of a cancer agency in some places); national, regional and local leadership structures; links between primary and secondary care. This study, however, demonstrated a central role for sustained leadership and political commitment, crucial for initiating and maintaining progress, as was a coherent vision that supported the implementation of national policies locally. Clinical leadership emerged as vital for translating policy into action.

Conclusions

Improving cancer outcomes is challenging and complex but is unlikely to be achieved without effective leadership and sustained political commitment that can create effective co-ordination of care.

Key messages

Different facets of leadership of the cancer care system emerged as important when exploring the reasons for variations in cancer outcomes in high-income countries. The persistence of these variations is unacceptable. Change will require political commitment and effective leadership, especially by clinicians.

Mediterranean-Dash Intervention for Neurodegenerative Delay (MIND) Diet Slows Cognitive Decline After Stroke

OBJECTIVE

This study sought to determine if the MIND diet (a hybrid of the Mediterranean and Dash diets, with modifications based on the science of nutrition and the brain), is effective in preventing cognitive decline after stroke.

DESIGN

We analyzed 106 participants of a community cohort study who had completed a diet assessment and two or more annual cognitive assessments and who also had a clinical history of stroke. Cognition in five cognitive domains was assessed using structured clinical evaluations that included a battery of 19 cognitive tests. MIND diet scores were computed using a valid food frequency questionnaire (FFQ). Dietary components of the MIND diet included whole grains, leafy greens and other vegetables, berries, beans, nuts, lean meats, fish, poultry, and olive oil and reduced consumption of cheese, butter, fried foods, and sweets. MIND diet scores were modeled in tertiles. The influence of baseline MIND score on change in a global cognitive function measure and in the five cognitive domains was assessed using linear mixed models adjusted for age and other potential confounders.

RESULTS

With adjustment for age, sex, education, APOE-ε4, caloric intake, smoking, and participation in cognitive and physical activities, the top vs lowest tertiles of MIND diet scores had a slower rate of global cognitive decline (β = .08; CI = 0.0074, 0.156) over an average of 5.9 years of follow-up.

CONCLUSIONS

High adherence to the MIND diet was associated with a slower rate of cognitive decline after stroke.

Seasonality of births in affective disorder in an Irish population

Seasonal variation in the births of patients with schizophrenia is a consistently replicated epidemiological finding. Few studies have investigated this phenomenon among patients with a diagnosis of affective disorder. The majority of season of birth studies have employed the chi square test for statistical analysis, a method that has been subject to some criticism. Using a Kolgomorov-Smirnov type statistic, the quarterly birth distribution of 6,646 patients with an ICD 9/10 diagnosis of affective disorder were compared to the general population. Only the births of those individuals with unipolar forms of affective disorder (n = 4,393) differed significantly from the general population, with significant excesses and deficits in the second quarter and fourth quarter respectively. These results were not altered by application of the displacement test. © 1998 Elsevier, Paris

Clinical and policy contexts for cancer care: Evidence from Denmark, Ireland and Ontario (Canada)

Background

We know there are large differences in cancer survival between countries. We know much less about why they exist and persist. In the International Cancer Benchmarking Partnership, we are seeking to understand the influences on patient journey in different countries. In this study we explore how health system factors impact on cancer care in Denmark, Ireland, and Ontario (Canada) to identify common themes, national specificities, and messages for other health care providers.

Methods

We systematically analysed (i) cancer policy and strategy documents from the three jurisdictions, published between 1995-2014 (n = 20) and (ii) interviews with key informants representing government, health services providers, professional bodies and patient organisations (n = 25). We thematically analysed both datasets using NVivo.

Results

Five themes emerged from the document review and were confirmed by interview: governance, quality assurance, service delivery, infrastructure and workforce. All three jurisdictions introduced a designated organisation to lead, monitor and, in Ontario, fund cancer services. Reducing wait times was prioritized, with the expansion of diagnostic capacity from the 2000s, for example. Concentrating services into fewer specialist centres was widely viewed as crucial for improving survival for some cancers. Yet policy intent was not always successfully realised on the ground, with lack of sustained investment, organisational barriers or logistical challenges impeding implementation. Jurisdictions face particular challenges maintaining and upgrading infrastructure and equipment, and recruiting and retaining critical staff, specifically in radiology and primary care.

Conclusions

Cancer care is complex and understanding the interrelationships between factors acting at different levels of the health system is important to improve outcomes. Continued investment in infrastructure and people will be essential.

Key messages

Countries face common challenges in creating health systems that optimise cancer outcomes. Sustained investment in equipment and human resources will be critical to optimise cancer care and survival.

Multiwavelength Light Curves of Two Remarkable Sagittarius A* Flares

Sgr A*, the supermassive black hole (SMBH) at the center of our Milky Way Galaxy, is known to be a variable source of X-ray, near-infrared (NIR), and submillimeter radiation and therefore a prime candidate to study the electromagnetic radiation generated by mass accretion flow onto a black hole and/or a related jet. Disentangling the power source and emission mechanisms of this variability is a central challenge to our understanding of accretion flows around SMBHs. Simultaneous multiwavelength observations of the flux variations and their time correlations can play an important role in obtaining a better understanding of possible emission mechanisms and their origin. This paper presents observations of two flares that both apparently violate the previously established patterns in the relative timing of submillimeter/NIR/X-ray flares from Sgr A*. One of these events provides the first evidence of coeval structure between NIR and submillimeter flux increases, while the second event is the first example of the sequence of submillimeter/X-ray/NIR flux increases all occurring within ~1 hr. Each of these two events appears to upend assumptions that have been the basis of some analytic models of flaring in Sgr A*. However, it cannot be ruled out that these events, even though unusual, were just coincidental. These observations demonstrate that we do not fully understand the origin of the multiwavelength variability of Sgr A* and show that there is a continued and important need for long-term, coordinated, and precise multiwavelength observations of Sgr A* to characterize the full range of variability behavior.

Simultaneous X-Ray and Infrared Observations of Sagittarius A*'s Variability

Emission from Saggitarius A* is highly variable at both X-ray and infrared (IR) wavelengths. Observations over the last ~20 yr have revealed X-ray flares that rise above a quiescent thermal background about once per day, while faint X-ray flares from Sgr A* are undetectable below the constant thermal emission. In contrast, the IR emission of Sgr A* is observed to be continuously variable. Recently, simultaneous observations have indicated a rise in IR flux density around the same time as every distinct X-ray flare, while the opposite is not always true (peaks in the IR emission may not be coincident with an X-ray flare). Characterizing the behavior of these simultaneous X-ray/IR events and measuring any time lag between them can constrain models of Sgr A*'s accretion flow and the flare emission mechanism. Using 100+ hours of data from a coordinated campaign between the Spitzer Space Telescope and the Chandra X-ray Observatory, we present results of the longest simultaneous IR and X-ray observations of Sgr A* taken to date. The cross-correlation between the IR and X-ray light curves in this unprecedented data set, which includes four modest X-ray/IR flares, indicates that flaring in the X-ray may lead the IR by approximately 10-20 min with 68% confidence. However, the 99.7% confidence interval on the time-lag also includes zero, i.e., the flaring remains statistically consistent with simultaneity. Long-duration and simultaneous multi-wavelength observations of additional bright flares will improve our ability to constrain the flare timing characteristics and emission mechanisms, and must be a priority for Galactic Center observing campaigns.

Are dental professionals more likely to consume sweet snacks, over savoury snacks in the workplace?

Introduction

It has been speculated, but never been formally researched that dental professionals are the most experienced workforce in consuming sweet snacks. This is despite many undergraduate dental courses reinforcing the traditional theory that patients should be advised to avoid snacking on foods which are likely to contain sticky sugars that cause tooth decay.

Design

This was a prospective study, where several dental clinics across England were provided with sweet and savoury snacks during a normal working day. Staff members were then covertly observed, and their snacking patterns assessed.

Results

The average time it took for a sweet snack to be opened and consumed in a dental environment was 3.6 minutes, compared to 7.2 minutes for savoury snacks. Dentists were more likely to be seen eating sweet snacks, as opposed to savoury snacks. Of the dentists, 36.7% were observed eating savoury snacks, compared to 44.1% eating sweet snacks. Other staff members, including administration and cleaning staff, were the most likely representative group to be seen eating any snacks under observation.

Discussion and conclusions

The rate at which sweet snacks were opened and consumed was at olympic level among dental staff. The recommendations are that the dental team revisit the Prevention toolkit for delivering better oral health and book into their local practice for a dental check-up.