Timing of Radiotherapy (RT) After Radical Prostatectomy (RP): Long-term outcomes in the RADICALS-RT trial [NCT00541047]

BACKGROUND

The optimal timing of radiotherapy (RT) after radical prostatectomy for prostate cancer has been uncertain. RADICALS-RT compared efficacy and safety of adjuvant RT versus an observation policy with salvage RT for PSA failure.

METHODS

RADICALS-RT was a randomised controlled trial enrolling patients with ≥1 risk factor (pT3/4, Gleason 7-10, positive margins, pre-op PSA≥10ng/ml) for recurrence after radical prostatectomy. Patients were randomised 1:1 to adjuvant RT ("Adjuvant-RT") or an observation policy with salvage RT for PSA failure ("Salvage-RT") defined as PSA≥0.1ng/ml or 3 consecutive rises. Stratification factors were Gleason score, margin status, planned RT schedule (52.5Gy/20 fractions or 66Gy/33 fractions) and treatment centre. The primary outcome measure was freedom-from-distant metastasis, designed with 80% power to detect an improvement from 90% with Salvage-RT (control) to 95% at 10yr with Adjuvant-RT. Secondary outcome measures were bPFS, freedom-from-non-protocol hormone therapy, safety and patient-reported outcomes. Standard survival analysis methods were used; HR<1 favours Adjuvant-RT.

FINDINGS

Between Oct-2007 and Dec-2016, 1396 participants from UK, Denmark, Canada and Ireland were randomised: 699 Salvage-RT, 697 Adjuvant-RT. Allocated groups were balanced with median age 65yr. 93% (649/697) Adjuvant-RT reported RT within 6m after randomisation; 39% (270/699) Salvage-RT reported RT during follow-up. Median follow-up was 7.8 years. With 80 distant metastasis events, 10yr FFDM was 93% for Adjuvant-RT and 90% for Salvage-RT: HR=0.68 (95%CI 0·43-1·07, p=0·095). Of 109 deaths, 17 were due to prostate cancer. Overall survival was not improved (HR=0.980, 95%CI 0.667-1.440, p=0.917). Adjuvant-RT reported worse urinary and faecal incontinence one year after randomisation (p=0.001); faecal incontinence remained significant after ten years (p=0.017).

INTERPRETATION

Long-term results from RADICALS-RT confirm adjuvant RT after radical prostatectomy increases the risk of urinary and bowel morbidity, but does not meaningfully improve disease control. An observation policy with salvage RT for PSA failure should be the current standard after radical prostatectomy.

Reporting of paediatric osteoporotic vertebral fractures in Duchenne muscular dystrophy and potential impact on clinical management: the need for standardised and structured reporting

BACKGROUND

In boys with Duchenne muscular dystrophy (DMD), initiation of bisphosphonate is recommended upon identification of moderate or severe vertebral fractures, even if asymptomatic. Clear radiological reporting is important for consistency of clinical interpretation and management.

OBJECTIVES

To audit radiology reports of spine imaging for vertebral fracture assessment in DMD, and assess potential impact on diagnosis and management.

MATERIALS AND METHODS

Lateral thoracolumbar spine imaging (71 lateral spine radiographs and 13 lateral dual energy absorptiometry spine image) in 84 boys with DMD performed across two centres. Anonymised radiology reports by paediatric radiologists were circulated to two neuromuscular clinicians and two endocrinologists. Clinicians determined if there was vertebral fracture, no vertebral fracture, or unclear interpretation. Endocrinologists also determined if bisphosphonate was indicated. A single observer (a clinician with expertise in vertebral fracture assessment) performed vertebral fracture assessment in 37 images and re-reported using a structured format. Structured reports were re-circulated to the four clinicians to re-evaluate the degree of concordance in clinical diagnosis of vertebral fracture and treatment decisions with bisphosphonate.

RESULTS

The term "fracture" was used in 25/84 (30%) radiology reports and only in 8/43 (19%) with description of vertebral body abnormalities. Fracture grading was included in 7/43 (16%) radiology reports. Diagnostic concordance by the clinicians was noted in 36/84 (43%). Unclear interpretation was noted in 22% to 51% based on radiology reports. No unclear interpretation was noted with structured reports. Complete diagnostic (37/37, 100%) and treatment (37/37, 100%) concordance was noted with the structured reports, whereas complete diagnostic and treatment concordance was noted in only 16/37 (43%) and 17/37 (46%) of the radiology reports, respectively.

CONCLUSION

Only a third of radiology reports of spine imaging in DMD explicitly used the terminology "fracture". Grading was only noted in a small percentage. Variability in diagnostic interpretation by clinicians may lead to differing management plans. As identification of vertebral fracture is a trigger for treatment, developing reporting guidelines for paediatric vertebral fracture assessment will improve care. A structured template should be introduced for radiological reporting of paediatric vertebral fracture assessment.

Analysis of rare disruptive germline mutations in 2,135 enriched BRCA-negative breast cancers excludes additional high-impact susceptibility genes

BACKGROUND

Breast cancer has a significant heritable basis, of which approximately 60% remains unexplained. Testing for BRCA1/BRCA2 offers useful discrimination of breast cancer risk within families, and identification of additional breast cancer susceptibility genes could offer clinical utility.

PATIENTS AND METHODS

We included 2,135 invasive breast cancer cases recruited via the BOCS study, a retrospective UK study of familial breast cancer.

ELIGIBILITY CRITERIA

female, BRCA-negative, white European ethnicity, and one of: i) breast cancer family history, ii) bilateral disease, iii) young age of onset (<30 years), iv) concomitant ovarian cancer. We undertook exome sequencing of cases and performed gene-level burden testing of rare damaging variants against those from 51,377 ethnicity-matched population controls from gnomAD.

RESULTS

159/2135 (7.4%) cases had a qualifying variant in an established breast cancer susceptibility gene, with minimal evidence of signal in other cancer susceptibility genes. Known breast cancer susceptibility genes PALB2, CHEK2 and ATM were the only genes to retain statistical significance after correcting for multiple testing. Due to the enrichment of hereditary cases in the series, we had good power (>80%) to detect a gene of BRCA1-like risk (odds ratio = 10.6) down to a population minor allele frequency of 4.6 x 10^-5 (1 in 10,799, less than one tenth that of BRCA1)and of PALB2-like risk (odds ratio = 5.0) down to a population minor allele frequency of 2.8 x 10^-4 (1 in 1,779, less than half that of PALB2). Power was lower for identification of novel moderate penetrance genes (odds ratio = 2-3) like CHEK2 and ATM.

CONCLUSIONS

This is the largest case-control whole-exome analysis of enriched breast cancer published to date. Whilst additional breast cancer susceptibility genes likely exist, those of high penetrance are likely to be of very low mutational frequency. Contention exists regarding the clinical utility of such genes.

Cefazolin susceptibility of coagulase-negative staphylococci (CoNS) causing late-onset neonatal bacteraemia

BACKGROUND

CoNS bacteraemia causes significant neonatal morbidity. Previous work has suggested that β-lactam antibiotics vary in their binding affinity to PBP2a (produced by the mecA gene) present in most CoNS.

OBJECTIVES

We evaluated cefazolin MICs for CoNS isolated in an Australian neonatal ICU (NICU) and correlated them with isolate genotype and phenotype.

METHODS

Significant blood isolates from 2009 to 2017 were speciated and underwent broth microdilution testing for cefazolin, cefoxitin, oxacillin and flucloxacillin. Correlation with mecA presence and PBP2a expression was evaluated. A selection of Staphylococcus capitis isolates underwent WGS.

RESULTS

The CoNS (n = 99) isolates were confirmed as S. capitis (n = 57), Staphylococcus epidermidis (n = 32), Staphylococcus haemolyticus (n = 2) and Staphylococcus warneri (n = 8). The MIC of cefazolin was ≤2 mg/L for 30% of isolates and 75% had an MIC of ≤8 mg/L (MIC90 = 16 mg/L). This contrasted with MIC90s of cefoxitin, oxacillin and flucloxacillin, which were all ≥32 mg/L. WGS found a number of S. capitis isolates closely related to the globally established NRCS-A clone.

CONCLUSIONS

CoNS displayed distinctly lower MIC values of cefazolin than of other agents tested. MIC variation may be related to binding affinity of PBP2a or regulation of expression of mecA by mecR1-mecI functional genes. Further, NRCS-A S. capitis strains were present in this Australian NICU before and after the unit underwent physical relocation, which raised questions about a common environmental source. It is considered justified to conduct a randomized clinical trial that assesses cefazolin versus vancomycin for management of late-onset neonatal sepsis.

Phase Diagram for Light-Induced Superconductivity in κ-(ET)_{2}-X

Resonant optical excitation of certain molecular vibrations in κ-(BEDT-TTF)_{2}Cu[N(CN)_{2}]Br has been shown to induce transient superconductinglike optical properties at temperatures far above equilibrium T_{c}. Here, we report experiments across the bandwidth-tuned phase diagram of this class of materials, and study the Mott insulator κ-(BEDT-TTF)_{2}Cu[N(CN)_{2}]Cl and the metallic compound κ-(BEDT-TTF)_{2}Cu(NCS)_{2}. We find nonequilibrium photoinduced superconductivity only in κ-(BEDT-TTF)_{2}Cu[N(CN)_{2}]Br, indicating that the proximity to the Mott insulating phase and possibly the presence of preexisting superconducting fluctuations are prerequisites for this effect.

Risk of anticholinergic burden in adults with intellectual disabilities: a Scottish retrospective cohort study of n = 17 220

BACKGROUND

Several drugs have anticholinergic side effects that are associated with adverse health outcomes. Anticholinergic burden studies in adults with intellectual disabilities (ID) have focused exclusively on older adults. This study investigates anticholinergic burden and its associations in adults with ID of all ages (17-94 years).

METHODS

Adults with ID (n = 4 305), each with three general population age-sex-neighbourhood-matched controls (n = 12 915), were linked to their prescribed medications with anticholinergic effects between 2009 and 2017. Analyses were undertaken using logistic regression models.

RESULTS

Adults with ID were more likely to be prescribed any anticholinergic medicines, odds ratio (OR) = 1.49 (1.38-1.59), especially 'very strong' risk medicines, OR = 2.59 (2.39-2.81); 48.5% had very high total anticholinergic burden (3+) compared with 35.4% of the general population, OR = 1.77 (1.64-1.90). This group difference was greater for males, OR = 2.02 (1.84-2.22), than females, OR = 1.48 (1.33-1.65). Adults with ID had significantly higher odds of having very high total anticholinergic burden up to 75 years old, with the greatest group effect occurring in younger ages, 17-24-year-olds, OR = 3.05 (2.39-3.89), and the extent of the difference decreased as age increased. The main effect of neighbourhood deprivation showed greater group differences with increasing affluence of neighbourhood. Results examining only the ID group showed that very high total anticholinergic burden was greatest for females, OR = 1.21 (1.07-1.37), and those over age 55, and extent of neighbourhood deprivation was not significant.

CONCLUSIONS

Adults with ID are at higher risk of anticholinergic burden than the general population, especially young adults. Overall anticholinergic burden increased with age, but burden was high across all ages in the ID group. Very high total anticholinergic burden is prevalent across all types of neighbourhoods for the adults with ID, in contrast to the steeper gradient seen in the general population. Adults with ID have increased likelihood of unintended adverse effects, regardless of potential confounds, so clinicians undertaking medication reviews need to consider anticholinergic side effects and cumulative burden across concomitant medications, including in young adults with ID, not just older adults, and particularly women.

Should cardiac rehabilitation programmes be specifically targeting sedentary time?

Funding Acknowledgements

Type of funding sources: None.

Background / Introduction

Structured exercise classes and advice regarding regular moderate intensity physical activity are well-established components of cardiac rehabilitation (CR). Sedentary behaviour, refers to activities typically sitting or lying that do not substantially increase energy expenditure above resting, and increasing evidence suggests adults should limit their sedentary time to less than 9 hours/day as such behaviour with increased cardiovascular and all-cause mortality with additional benefits likely gained sitting less than 6-8 hours/day. Nonetheless sedentary behaviours are often overlooked or are only partially assessed via self-report in CR programmes. Due to covid restrictions (lockdown, social distancing, suspension of face-to-face CR programmes) there is concern that sedentary time may further increase in this population. Thus, it may be important to effectively monitor and target sedentary time, alongside traditional advice, to minimise its negative health impacts.

Purpose

Can a CR programme, adapted to remote delivery due to covid, objectively measure sedentary behaviour in a way that is feasible in every day practice and acceptable to patients?

Methods

Consecutive cardiovascular patients attending an initial assessment (via telephone or video) on the Our Hearts Our Minds Programme for Cardiovascular Health between December 2020 and February 2021 were asked to wear activPAL (PAL technologies Ltd., Glasgow, UK), a triaxial accelerometer, on their thigh for 7 days to measure the postural aspect of sedentary behaviour. On return of the monitor, the data was analysed using proprietary algorithms (intelligent activity classification) generating a report summarising time spent sitting, prolonged sitting, step count average, number of sit to stand transitions, moderate intensity activity minutes, most sedentary time(s) of the day and percentages spent in these activities. This personalised report was shared with the patient and their goals in terms of sedentary behaviour and physical activity were discussed and agreed.

Results

59 referrals were received between mid December 2020 and February 2021, of which 52 had an initial virtual assessment. Of these, 50 patients accepted an activPAL (96% response rate). Mean age 62.6 years. The output from the activPal is shown in table 1. The average sitting time overall was 9 hours 36 minutes. The breakdown in proportions sitting for extended periods of time are detailed in table below

Conclusion

2/3 of cardiovascular patients attending CR had levels of sitting time greater than what is recommended following their IA. Measuring sedentary time beyond self-report in CR programmes using activPal was feasible in a CR programme with 96% of consecutive patients wearing and returning activPAL.  Repeat analysis at end of programme will show if use of this data results in reduction of same .

Dental attendance, restoration and extractions in adults with intellectual disabilities compared with the general population: a record linkage study

BACKGROUND

Oral health may be poorer in adults with intellectual disabilities (IDs) who rely on carer support and medications with increased dental risks.

METHODS

Record linkage study of dental outcomes, and associations with anticholinergic (e.g. antipsychotics) and sugar-containing liquid medication, in adults with IDs compared with age-sex-neighbourhood deprivation-matched general population controls.

RESULTS

A total of 2933/4305 (68.1%) with IDs and 7761/12 915 (60.1%) without IDs attended dental care: odds ratio (OR) = 1.42 [1.32, 1.53]; 1359 (31.6%) with IDs versus 5233 (40.5%) without IDs had restorations: OR = 0.68 [0.63, 0.73]; and 567 (13.2%) with IDs versus 2048 (15.9%) without IDs had dental extractions: OR = 0.80 [0.73, 0.89]. Group differences for attendance were greatest in younger ages, and restoration/extractions differences were greatest in older ages. Adults with IDs were more likely prescribed with anticholinergics (2493 (57.9%) vs. 6235 (48.3%): OR = 1.49 [1.39, 1.59]) and sugar-containing liquids (1641 (38.1%) vs. 2315 (17.9%): OR = 2.89 [2.67, 3.12]).

CONCLUSION

Carers support dental appointments, but dentists may be less likely to restore teeth, possibly extracting multiple teeth at individual appointments instead.

Association between minimum inhibitory concentration, beta-lactamase genes and mortality for patients treated with piperacillin/tazobactam or meropenem from the MERINO study

INTRODUCTION

This study aims to assess the association of piperacillin/tazobactam and meropenem minimum inhibitory concentration (MIC) and beta-lactam resistance genes with mortality in the MERINO trial.

METHODS

Blood culture isolates from enrolled patients were tested by broth microdilution and whole genome sequencing at a central laboratory. Multivariate logistic regression was performed to account for confounders. Absolute risk increase for 30-day mortality between treatment groups was calculated for the primary analysis (PA) and the microbiologic assessable (MA) populations.

RESULTS

320 isolates from 379 enrolled patients were available with susceptibility to piperacillin/tazobactam 94% and meropenem 100%. The piperacillin/tazobactam non-susceptible breakpoint (MIC > 16 mg/L) best predicted 30-day mortality after accounting for confounders (odds ratio 14.9, 95% CI 2.8 - 87.2). The absolute risk increase for 30-day mortality for patients treated with piperacillin/tazobactam compared with meropenem was 9% (95% CI 3% - 15%) and 8% (95% CI 2% - 15%) for the original PA population and the post-hoc MA populations, which reduced to 5% (95% CI -1% - 10%) after excluding strains with piperacillin/tazobactam MIC values > 16 mg/L. Isolates co-harboring ESBL and OXA-1 genes were associated with elevated piperacillin/tazobactam MICs and the highest risk increase in 30-mortality of 14% (95% CI 2% - 28%).

CONCLUSION

After excluding non-susceptible strains, the 30-day mortality difference was from the MERINO trial was less pronounced for piperacillin/tazobactam. Poor reliability in susceptibility testing performance for piperacillin/tazobactam and the high prevalence of OXA co-harboring ESBLs suggests meropenem remains the preferred choice for definitive treatment of ceftriaxone non-susceptible E. coli and Klebsiella.

Is provision of contraception at discharge following delivery associated with postpartum visit attendance?

OBJECTIVES

We examined whether provision of contraception at discharge following delivery was associated with lower rates of postpartum visit (PPV) attendance.

METHODS

We conducted a retrospective cohort study of women who received pregnancy care at a Midwestern medical center in 2013. Attendance at the postpartum visit was compared for women with sterilization, contraception initiated prior to discharge (depot medroxyprogesterone acetate or etonogestrel implant), hormonal contraception prescription, or no contraception provided at postpartum discharge. Poisson regression models with robust standard errors were used to estimate the relative risk of postpartum visit attendance controlling for age, race, and parity, insurance status, and histories of both depression and drug abuse.

RESULTS

Of the 1015 women who met inclusion criteria, 55% had been prescribed contraception, had initiated contraception prior to discharge, or were sterilized at the time of discharge following delivery. After adjustment for confounders, there was no association between receiving contraception and PPV attendance (relative risk for prescribed contraception = 1.09 [95% CI 0.85, 1.39], for contraception initiated prior to discharge = 0.83 [95% CI 0.67, 1.03], for sterilization = 0.86 [95% CI 0.63, 1.17] compared to no contraception).

CONCLUSIONS

We found no evidence that prescribing or administering contraception post-delivery was associated with lower rates of return for postpartum follow up.

IMPLICATIONS

This single site study suggests that providing effective contraception at discharge following delivery does not appear to impact PPV attendance.

Prevalence of factors associated with edentulousness (no natural teeth) in adults with intellectual disabilities

BACKGROUND

Poor oral health is largely preventable. Prevention includes toothbrushing and regular dental checks. Oral health has important consequences for general nutrition, chewing, communication, wider systemic disease, self-confidence and participation in society. This study investigated the prevalence of edentulousness (no natural teeth) in adults with intellectual disabilities (IDs) compared with the general population and associated factors.

METHODS

An adult cohort with IDs residing in Greater Glasgow and Clyde, Scotland, underwent detailed health assessments between 2002 and 2004. Between 2004 and 2006, a subsample had an oral check. Data on edentulousness in the cohort were compared with adult participants from Greater Glasgow and Clyde in the 2008 Scottish Health Survey. Within the IDs cohort, binary logistic regression analyses investigated potential relationships between edentulousness and demographic and clinical factors.

RESULTS

Five hundred sixty adults with IDs were examined [53.2% (298) male, mean age = 46.3 years, range 18-81 years] and compared with 2547 general population: edentulousness was 9% vs. 1% aged 25-34 years; 22% vs. 2% aged 35-44 years; 39% vs. 7% aged 45-54 years; 41% vs. 18% aged 55-64 years; and 76% vs. 34% aged 65-74 years. In both groups, edentulousness increased with age. After stratification for age, rates of edentulousness were consistently higher in the ID cohort. Odds ratios within age strata were not homogenous (Mantel-Haenszel test, P < 0.0001). Edentulousness was more likely in those with more severe IDs (adjusted odds ratio (AOR) = 2.36; 95% confidence interval (CI) [1.23 to 4.51]); those taking antipsychotics (AOR = 2.09; 95% CI [1.25 to 3.51]) and those living in the most deprived neighbourhoods (AOR = 2.69; 95% CI [1.11 to 6.50]). There was insufficient evidence for associations with sex, type of accommodation/support, antiepileptics, problem behaviours or autism.

CONCLUSIONS

Adults with IDs have a high prevalence of edentulousness and need supported daily oral care to reduce the need for extractions. Despite previous reports on poor oral care and the move towards person-centred care, carers and care-giving organisations need greater support to implement daily oral care. Prescribers need awareness of the potentially contributory role of antipsychotics, which may relate to xerostomia.

Neurodevelopmental multimorbidity and educational outcomes of 766,244 Scottish schoolchildren

Background

Neurodevelopmental conditions commonly co-exist in children but, in comparison with adults, childhood multimorbidity has attracted less attention in research and clinical practice.

Methods

Record linkage of five Scotland-wide databases produced a cohort of 766,244 children attending Scottish schools between 2009 and 2013. Autistic spectrum disorder (ASD) and intellectual disabilities were ascertained from records of special educational need in the annual Pupil Census and attention deficit hyperactivity disorder (ADHD) and depression through relevant encashed prescriptions.

Results

Neurodevelopmental multimorbidity (≥2 conditions) was identified in 4,789 (0·6%) children; with ASD and ADHD the most common combination. Multimorbidity was associated with significantly increased risk of school absenteeism (adjusted IRR 1·23, 95% CI 1·20-1·28), school exclusion (adjusted IRR 3·04, 95% CI 2·74-3·38), low attainment (adjusted OR 12·07, 95% CI 9·15-15·94) and unemployment (adjusted OR 2·11, 95% CI 1·83-2·45) with clear dose relationships evident between number of conditions (0, 1, ≥2) and the last three outcomes. The associations with multimorbidity were stronger in girls than boys. Co-existence of depression was the strongest driver of absenteeism and co-existence of ADHD the strongest driver of exclusion. Low attainment and unemployment were, in part, mediated by absence and attainment respectively, and were not driven by specific conditions but rather multimorbidity from any cause.

Conclusions

Structuring clinical practice and training around single conditions may disadvantage children with multimorbidity who are at significantly increased risk of adverse outcomes if their complex needs are not recognised and managed.

Key messages

Neurodevelopmental multimorbidity can have significant impacts on children’s education. A holistic healthcare approach is needed to reduce the address their needs and reduce the risk of adverse outcomes.

A33 Using serological and surveillance data to infer the introduction date and unobserved transmission dynamics of Zika virus in Fiji 2013–7

Zika virus (ZIKV) has been circulating in the South Pacific since 2007, and transmission in Fiji was first confirmed in 2015. To better understand the history and transmission dynamics of ZIKV in Fiji, we combined a transmission dynamic model with serological and surveillance data from Central Division, Fiji. A longitudinal population representative of seroepidemiological data were available from participants sampled in 2013, 2015, and 2017. In addition, ZIKV case reports were available from 2015 and 2016. Using a Bayesian approach, we fitted a transmission dynamic model with a seasonally varying transmission to these data. We also estimated the virus introduction date, given the effect this has on transmission dynamics as it interacts with the observed seasonal pattern of transmission. We found evidence that the virus was introduced in October 2013 (95% credible interval: April 2013–April 2014) and that the strong seasonal transmission pattern meant the virus persisted for several years with multiple waves of infection in consecutive years. It is important to corroborate this evidence against other work done in the same area. A phylogenetic analysis was performed on 5 ZIKV strains obtained from Fiji in 2015 and 2016, which were aligned with 33 E gene sequences from the Pacific, Americas, and Africa. This analysis showed evidence of virus persistence over multiple years in Central Division, Fiji. The estimated most recent common ancestor of the group isolated from Central Division was November 2013 (95% credible interval: March 2013–July 2015). Our modeling estimate is consistent with these results despite the very different methods being used. The availability of detailed case and serology data in an island outbreak setting, combined with mathematical models, presented a unique opportunity to gain crucial insights into these infections. Our analysis provides evidence that seasonal variation in transmission, combined with other co-circulating flaviviruses, means the timing of ZIKV introduction can have a major impact on outbreak transmission dynamics.

Benzylpenicillin versus flucloxacillin for penicillin-susceptible Staphylococcus aureus bloodstream infections from a large retrospective cohort study

In clinical practice, differing opinions exists regarding the optimal management of patients with penicillin-susceptible Staphylococcus aureus (PSSA) bloodstream infection (BSI). The aim of this study was to compare the 30-day mortality of patients treated with benzylpenicillin or flucloxacillin for PSSA BSI from a large prospectively collected data set from Australia and New Zealand. A logistic regression model and propensity score treatment analysis using inverse probability of treatment weighting were used. A total of 915 patients were included in the study, with an overall mortality rate of 12.9% (118/915) [benzylpenicillin 10.5% (33/315) and flucloxacillin 14.2% (85/600)]. Endocarditis was associated with benzylpenicillin treatment choice, whereas skin and soft-tissue infection was associated with flucloxacillin treatment choice. In the multivariate analysis, increased 30-day mortality was associated with flucloxacillin compared with benzylpenicillin [odds ratio (OR) = 1.6, 95% confidence interval (CI) 1.0-2.5; P = 0.05). When adjusted for treatment choice in the propensity score analysis, flucloxacillin was again associated with increased 30-day mortality (OR = 1.06, 95% CI 1.01-1.1; P = 0.03). An increase in 30-day mortality associated with flucloxacillin use suggests a potential benefit for benzylpenicillin therapy in patients with PSSA BSI.

Uveitis and optic perineuritis in the context of myelin oligodendrocyte glycoprotein antibody seropositivity

BACKGROUND AND PURPOSE

Antibodies to myelin oligodendrocyte glycoprotein (MOG) have been identified in both children and adults with demyelination, with a strong association with bilateral or recurrent optic neuritis (ON). However, the full clinical spectrum of this newly described condition is unknown. We sought to describe non-ON inflammatory ophthalmological presentations such as uveitis and optic perineuritis in the context of MOG antibody seropositivity.

METHODS

Using a live cell-based assay analysed by flow cytometry, we identified seropositive patients referred for MOG antibody testing in Australasia between 2014 and 2017. We identified four MOG antibody-positive patients with non-ON inflammatory ophthalmological presentations and present their detailed clinical information in this case series.

RESULTS

Three patients had uveitis either in association with, or remote from, ON. One patient had optic perineuritis and peripheral ulcerative keratitis. We describe the presentation, examination, investigation findings and clinical course of these four patients.

CONCLUSIONS

Recognition of these novel clinical associations may expand the clinical spectrum of MOG antibody-associated presentations. An expedited diagnosis may guide the management of these complex patients.

Activity of ceftolozane/tazobactam against a collection of Pseudomonas aeruginosa isolates from bloodstream infections in Australia

Pseudomonas aeruginosa is a common pathogen causing nosocomial infection. In particular, bloodstream infection (BSI) is associated with a high rate of morbidity and mortality. Ceftolozane/tazobactam is a new β-lactam/β-lactamase antimicrobial with activity against P. aeruginosa as well as multidrug resistant (MDR) Gram negative Enterobacteriaceae. Ceftolozane/tazobactam has frequently been used in salvage therapy for MDR P. aeruginosa infections. The aim of this study was to determine the activity of ceftolozane/tazobactam against P. aeruginosa isolates from BSIs collected from three clinical microbiology laboratories in Queensland, Australia, with a high proportion of isolates demonstrating β-lactam resistance. Antimicrobial susceptibility testing was performed by broth microdilution using custom made sensititre plates sourced from ThermoFisher Scientific. In addition to ceftolozane/tazobactam, we also tested piperacillin/tazobactam, ceftazidime, cefepime, meropenem, doripenem, imipenem, aztreonam, ciprofloxacin, levofloxacin, gentamicin, amikacin, tobramycin and colistin. Overall, ceftolozane/tazobactam was the most active agent tested [(MIC_50/90 = 1/2 μg/mL, 96% susceptible (S)]. Against 44 isolates with resistance to at least one other β-lactam agent, 40 were susceptible to ceftolozane/tazobactam. Three ceftolozane/tazobactam resistant isolates were susceptible to colistin, with one of those isolates also susceptible to levofloxacin but not to any other antimicrobials tested. One ceftolozane/tazobactam resistant isolate was susceptible only to meropenem and doripenem but was non-susceptible to imipenem. An association was found between fluoroquinolone resistance and aminoglycoside resistance but not with β-lactam resistance. In summary, ceftolozane/tazobactam was active against most strains tested, including those resistant to other β-lactams. Laboratories should consider testing P. aeruginosa against ceftolozane/tazobactam in suspected MDR or extensively drug resistant (XDR) infections.

Cryptococcosis-the impact of delay to diagnosis

Cryptococcosis is a mycotic disease caused by the yeast Cryptococcus sp. It is associated with significant mortality and morbidity, including long-term neurological sequelae. It is not known whether the high morbidity observed is related to a delay in diagnosis. A retrospective chart review of all cryptococcal infections that had been diagnosed in the region between 1997 and 2015 was performed. Twenty-nine cases were identified. Overall mortality rate was 10.3%, with an attributable mortality rate of 6.9%. Forty-five per cent of patients with central nervous system involvement developed long-term neurological deficits. Significant associations were noted between those with and without long-term neurological deficits and in both time from onset of symptoms to diagnosis (median of 45.5 days versus 18.5 days, respectively) and time from presentation to diagnosis (median 14.5 days versus 7 days, respectively). In addition, raised intracranial pressure (p 0.03) and female gender (p 0.02) were significantly associated with poor neurological outcomes. This highlights the importance of early diagnosis and the need to limit raised intracranial pressure to minimize long-term neurological deficits.

A review of the diagnosis and management of sudden hearing loss in the military population

Sudden hearing loss can be both an immediately debilitating and long-term career-threatening condition within the military population. Careful assessment is key, particularly in an environment where heightened occupational risk factors may contribute to or confound diagnoses, and where access to basic investigation may be limited. This article looks at the patient with a new presentation of sudden hearing loss in a military setting and, by providing key features and a structured approach to examination and basic investigation, how to consider key diagnoses through clinical assessment alone. The acute management of sudden sensorineural hearing loss (SNHL) remains a difficult issue, particularly regarding the efficacy of treatment regimes to restore hearing. We have reviewed the evidence to help military medical personnel make well-informed decisions when treating and making occupational assessment of those they have diagnosed with sudden hearing loss.

Effect of a single 1200 Mg dose of Mucinex® on mucociliary and cough clearance during an acute respiratory tract infection

BACKGROUND

Observational studies suggest that orally administered guaifenesin (GGE) may thin lower respiratory tract secretions but none have examined its effects on mucociliary and cough clearance (MCC/CC) during a respiratory tract infection (RTI). The current study was a randomized, parallel-group, double-blind, placebo-controlled study in non-smoking adults who suffered from an acute upper RTI.

METHODS

We assessed the effects of a single dose of Mucinex(®) 1200 mg (2 × 600 mg extended release tablets) (ER GGE) on 1) MCC/CC by assessing the rate of removal from the lung of inhaled radioactive tracer particles (Tc99m-sulfur colloid), 2) sputum dynamic rheology by stress/strain creep transformation over the linear part of the curve, 3) sessile drop interfacial tension by the deNouy ring technique, and 4) subjective symptom measures. MCC was measured during the morning (period 1) and compared to that in the afternoon 4 h later (period 2) immediately following either drug (n = 19) or placebo (n = 19). For both period 1 and 2 subjects performed 60 voluntary coughs from 60 to 90 min after inhalation of radio-labeled aerosol for a measure of CC. Sputum properties were measured from subjects who expectorated sputum during the cough period post treatment (n = 8-12 for each cohort).

RESULTS

We found no effect of ER GGE on MCC or CC compared to placebo. MCC through 60 min for period 1 vs. 2 = 8.3 vs. 11.8% (placebo) and = 9.7 vs. 11.1% (drug) (NS) and CC for period 1 vs. 2 was 9.9 vs. 9.1% (placebo) and 10.8 vs. 5.6% (drug) (NS). There was no significant difference in sputum biophysical properties after administration of drug or placebo.

CONCLUSIONS

There was no significant effect of a single dose of ER GGE on MCC/CC or on sputum biophysical properties compared to placebo in this population of adult patients with an acute RTI. ClinicalTrials.gov Identifier: NCT01114581.

Choosing Wisely in the UK: the Academy of Medical Royal Colleges' initiative to reduce the harms of too much medicine

A Malhotra and colleagues explain how and why a US initiative to get doctors to stop using interventions with no benefit is being brought to the UK

Large-scale discovery of novel genetic causes of developmental disorders

Despite three decades of successful, predominantly phenotype-driven discovery of the genetic causes of monogenic disorders, up to half of children with severe developmental disorders of probable genetic origin remain without a genetic diagnosis. Particularly challenging are those disorders rare enough to have eluded recognition as a discrete clinical entity, those with highly variable clinical manifestations, and those that are difficult to distinguish from other, very similar, disorders. Here we demonstrate the power of using an unbiased genotype-driven approach to identify subsets of patients with similar disorders. By studying 1,133 children with severe, undiagnosed developmental disorders, and their parents, using a combination of exome sequencing and array-based detection of chromosomal rearrangements, we discovered 12 novel genes associated with developmental disorders. These newly implicated genes increase by 10% (from 28% to 31%) the proportion of children that could be diagnosed. Clustering of missense mutations in six of these newly implicated genes suggests that normal development is being perturbed by an activating or dominant-negative mechanism. Our findings demonstrate the value of adopting a comprehensive strategy, both genome-wide and nationwide, to elucidate the underlying causes of rare genetic disorders.

Enhanced FTIR bench-top imaging of single biological cells

A new optical system has recently been developed that enables infrared images to be obtained with a pixel resolution of 1 micron on a bench-top instrument using a thermal source.

Interprofessional learning enhances knowledge of roles but is less able to shift attitudes: a case study from dental education

INTRODUCTION

Interprofessional education (IPE) purports to improve team working through improved knowledge of the roles of others, and by engendering mutual respect. This case study aimed to determine the impact of an IPE curriculum on knowledge and attitudes of dentistry and dental technology students undertaking these curricula in the new School of Dentistry and Oral Health at Griffith University. All dental technology students and third- and final- (fifth) year dentistry students were invited to participate.

METHOD

A mixed-method approach was used to compare attitudes, perceptions and experiences of students involved in our IPE curricula. Quantitative data were evaluated with the Statistical Package for the Social Sciences (SPSS), and qualitative findings were explored through an Excel(®) spreadsheet coding frame tested against Leximancer™ qualitative software for consistency.

RESULTS

Forty-six of the 131 eligible students participated. Readiness for Interprofessional Learning Scales (RIPLS) and focus groups consistently showed that IPE positively influenced professional identity and improved communication between and amongst all students and assisted them in developing their roles. A prevailing sense of greater importance and a lack of mutual respect between dentistry and dental technology students were, unfortunately, evident. The process was, however, sufficient to enhance teamwork and collaboration when planned learning revolved around explicit patient care in the provision of dental prostheses.

CONCLUSION

Further development of such curricula is needed to maximise IP learning (IPL) opportunities, to shift traditional attitudes and, potentially, to improve the outcomes of patient care. To enable this, academic and clinical leaders need to embrace the ideals of IPE.

SU-D-BRCD-06: Measurement of Elekta Electron Energy Spectra Using a Small Magnetic Spectrometer

PURPOSE

To demonstrate how a small magnetic spectrometer can measure the energy spectra of seven electron beams on an Elekta Infinity tuned to match beams on a previously commissioned machine.

METHODS

Energyspectra were determined from measurements of intensity profiles on 6″-long computed radiographic (CR) strips after deflecting a narrow incident beam using a small (28 lbs.), permanent magnetic spectrometer. CR plateexposures (<1cGy) required special beam reduction techniques and bremsstrahlung shielding. Curves of CR intensity (corrected for non- linearity and background) versus position were transformed into energy spectra using the transformation from position (x) on the CR plate to energy (E) based on the Lorentz force law. The effective magnetic field and its effective edge, parameters in the transformation, were obtained by fitting a plot of most probable incident energy (determined from practical range) to the peak position.

RESULTS

The calibration curve (E vs. x) fit gave 0.423 Tesla for the effective magnetic field. Most resulting energy spectra were characterized by a single, asymmetric peak with peak position and FWHM increasing monotonically with beam energy. Only the 9-MeV spectrum was atypical, possibly indicating suboptimal beam tuning. These results compared well with energy spectra independently determined by adjusting each spectrum until the EGSnrc Monte Carlo calculated percent depth-dose curve agreed well with the corresponding measured curve.

CONCLUSIONS

Results indicate that this spectrometer and methodology could be useful for measuring energy spectra of clinical electron beams at isocenter. Future work will (1) remove the small effect of the detector response function (due to pinhole size and incident angular spread) from the energy spectra, (2) extract the energy spectra exiting the accelerator from current results, (3) use the spectrometer to compare energy spectra of matched beams among our clinical sites, and (4) modify the spectrometer to utilize radiochromic film.

Understanding ethnic and other socio-demographic differences in patient experience of primary care: evidence from the English General Practice Patient Survey

BACKGROUND

Ethnic minorities and some other patient groups consistently report lower scores on patient surveys, but the reasons for this are unclear. This study examined whether low scores of ethnic minority and other socio-demographic groups reflect their concentration in poorly performing primary care practices, and whether any remaining differences are consistent across practices.

METHODS

Using data from the 2009 English General Practice Patient Survey (2 163 456 respondents from 8267 general practices) this study examined associations between patient socio-demographic characteristics and 11 measures of patient-reported experience.

FINDINGS

South Asian and Chinese patients, younger patients, and those in poor health reported a less positive primary care experience than White patients, older patients and those in better health. For doctor communication, about half of the overall difference associated with South Asian patients (ranging from -6 to -9 percentage points) could be explained by their concentration in practices with low scores, but the other half arose because they reported less positive experiences than White patients in the same practices. Practices varied considerably in the direction and extent of ethnic differences. In some practices ethnic minority patients reported better experience than White patients. Differences associated with gender, Black ethnicity and deprivation were small and inconsistent.

CONCLUSION

Substantial ethnic differences in patient experience exist in a national healthcare system providing universal coverage. Improving the experience of patients in low-scoring practices would not only improve the quality of care provided to their White patients but it would also substantially reduce ethnic group differences in patient experience. There were large variations in the experiences reported by ethnic minority patients in different practices: practices with high patient experience scores from ethnic minority patients could be studied as models for quality improvement.