A network analysis of Hurricane Maria-related traumatic stress and substance use among Puerto Rican youth

Youth exposed to natural disasters are at risk of developing trauma-related symptoms as well as engaging in substance use. Although previous research has established associations between disaster-related stressors and substance use in youth, less has focused on how symptoms of posttraumatic stress disorder (PTSD) may underpin this association. The current study used network analysis to identify specific PTSD symptoms associated with substance use following a natural disaster. Participants were 91,732 youths (Grades 3-12) from across Puerto Rico who completed a needs assessment 5-9 months after Hurricane Maria made landfall in September 2017. We examined associations between PTSD symptoms and substance use, identified clusters of symptoms and bridges between them, and explored age- and binary gender-related differences in associations between specific PTSD symptoms and substance use. Analyses identified two symptom communities: (a) arousal and reactivity, negative alterations in cognition and mood, and substance use, and (b) avoidance and intrusion. Broader findings suggested that substance use was most strongly associated with PTSD-related irritability and angry outbursts among youths. Surrounding nodes explained only 4.1% of the variance in substance use, but this was higher among youths who reported not having a supportive adult, R2 = 8.5; friend, R2 = 7.9; or teacher/counselor, R2 = 7.7, in their life. The bridge symptoms of sleep disruption and physiological reactivity were identified as potentially critical intervention targets for disrupting PTSD symptom networks after a natural disaster. Implications for triaged mental health care following natural disasters and directions for future research are discussed.

Heterogeneity of CFTR modulator-induced sweat chloride concentrations in people with cystic fibrosis

BACKGROUND

Sweat chloride (SC) concentrations in people with cystic fibrosis (PwCF) reflect relative CF transmembrane conductance regulator (CFTR) protein function, the primary CF defect. Populations with greater SC concentrations tend to have lesser CFTR function and more severe disease courses. CFTR modulator treatment can improve CFTR function within specific CF genotypes and is commonly associated with reduced SC concentration. However, SC concentrations do not necessarily fall to concentrations seen in the unaffected population, suggesting potential for better CFTR treatment outcomes. We characterized post-modulator SC concentration variability among CHEC-SC study participants by genotype and modulator.

METHODS

PwCF receiving commercially approved modulators for ≥90 days were enrolled for a single SC measurement. Clinical data were obtained from chart review and the CF Foundation Patient Registry (CFFPR). Variability of post-modulator SC concentrations was assessed by cumulative SC concentration frequencies.

RESULTS

Post-modulator SC concentrations (n = 3787) were collected from 3131 PwCF; most (n = 1769, 47 %) were collected after elexacaftor/tezacaftor/ivacaftor (ETI) treatment. Modulator use was associated with lower SC distributions, with post-ETI concentrations the lowest on average. Most post-ETI SC concentrations were <60 mmol/L (79 %); 26 % were <30 mmol/L. Post-ETI distributions varied by genotype. All genotypes containing at least one F508del allele had individuals with post-ETI SC ≥60 mmol/L, with the largest proportion being F508del/minimal function (31 %).

CONCLUSIONS

Post-modulator SC concentration heterogeneity was observed among all genotypes and modulators, including ETI. The presence of PwCF with post-modulator SC concentrations within the CF diagnostic range suggests room for additional treatment-associated CFTR restoration in this population.

Antimicrobial Susceptibility of Francisella tularensis Isolates in the United States, 2009-2018

Francisella tularensis is the causative agent of tularemia. We tested the susceptibility of 278 F. tularensis isolates from the United States received during 2009-2018 to 8 antimicrobial drugs (ciprofloxacin, levofloxacin, doxycycline, tetracycline, gentamicin, streptomycin, chloramphenicol, and erythromycin). All isolates were susceptible to all tested drugs.

The liver-heart axis in patients with severe obesity: The association between liver fibrosis and chronic myocardial injury may be explained by shared risk factors of cardiovascular disease

BACKGROUND

Severe obesity is associated with increased risk of non-alcoholic fatty liver disease and cardiovascular disease. We hypothesized that liver fibrosis as quantified by the Enhanced Liver Fibrosis (ELF) test would be predictive of myocardial injury and fibrosis, expressed by higher concentrations of cardiac troponin T and I measured by high-sensitivity assays (hs-cTnT and hs-cTnI, respectively).

MATERIAL AND METHODS

We performed cross-sectional analyses of baseline data from 136 patients (mean age 45 years, 38 % male) with severe obesity participating in the non-randomized clinical trial Prevention of Coronary Heart Disease in Morbidly Obese Patients (ClinicalTrials.gov NCT00626964). Associations between ELF scores, hs-cTnT, and hs-cTnI concentrations were assessed using linear regression analysis.

RESULTS

ELF scores were associated with hs-cTnT in the unadjusted model (B 0.381, 95 % Confidence Interval [CI] 0.247, 0.514), but the association was attenuated upon adjustment for potential confounders (B -0.031, 95 % CI -0.155, 0.093). Similarly, for hs-cTnI, an observed association with ELF scores in the unadjusted model was attenuated upon adjustment for potential confounders ((B 0.432, 95 % CI 0.179, 0.685) and (B 0.069, 95 % CI -0.230, 0.367), respectively). Age, sex, hypertension, and estimated glomerular filtration rate were amongst the shared predictors of ELF score, hs-cTnT, and hs-cTnI that provided the univariable models with the highest R-squared and lowest Akaike Information Criterion values.

CONCLUSIONS

Contrary to our hypothesis, ELF score did not predict myocardial injury and fibrosis, but we rather demonstrated an association between liver fibrosis and myocardial injury and fibrosis may be explained by shared risk factors of cardiovascular disease.

Mandated checkups, knowledge of own health status, and chronic care utilization: The effect of HIV medical evaluation mandates on healthcare quality and expenditure in a US-single payer system

In an effort to improve military readiness, in 2014 the US Air Force reduced the frequency of mandated HIV medical evaluation visits from every 6 months to every 12 months. We employ this natural experiment using data for 2676 active-duty Military Health System beneficiaries living with HIV with a difference-in-differences empirical strategy using the Army, Navy, and Marines as a control group to estimate the causal effect of reducing the frequency of mandated evaluation visits on the quality and cost of medical care for active-duty military members living with HIV. We find that reducing the frequency of mandated HIV medical evaluation visits reduced the likelihood of regular HIV visits by 23 percentage points but did not affect the likelihood of receiving other preventive care, adhering to HIV therapy, or maintaining viral testing and suppression. The study finds evidence that the recommended level of regular HIV visits may be higher than necessary. The reduction in regular HIV visits was not associated with a similar reduction in the studied quality of care measures, therefore, the effect of alleviating the mandate was overall positive in terms of reducing healthcare utilization without adversely affecting preventive care, HIV therapy, or viral testing and suppression.

Disaster exposure and mental health among Puerto Rican teachers after Hurricane Maria

The purpose of the study was to assess the prevalence rates of anxiety, depression, and posttraumatic stress disorder (PTSD) outcomes among teachers (N = 8,167) exposed to Hurricane Maria in Puerto Rico. The findings indicate that the rates of likely significant symptoms of anxiety, depression, and PTSD were 13.1%, 8.7%, and 5.4%, respectively. There were no significant disparities in psychopathological symptoms based on sex, except that female participants were more likely to exhibit anxiety symptoms than their male counterparts, odds ratio (OR) = 1.53. Key disaster-related factors, such as perceived threat, actual threat, and disruption of life were found to significantly influence all psychopathology outcomes, ORs = 1.20-3.57, whereas increased social support significantly buffered the manifestation of clinically significant psychopathology symptoms across all domains, ORs = 0.30-0.46. These outcomes, strongly linked to peritraumatic consequences, were not constrained by geographical or socioeconomic boundaries, highlighting the wide-ranging impact of the hurricane. Nevertheless, social support emerged as a significant counteracting force, reducing the likelihood of detrimental mental health symptoms. Consistent with prior studies, this study emphasizes the crucial role of social support in nurturing posttraumatic resilience and curbing the severity of posttraumatic stress outcomes, thus underscoring the need for incorporating robust social support systems within disaster response strategies.

A randomized controlled trial of analogue pharmacogenomic testing feedback for psychotropic medications

Objective

To examine the impact of various presentations of pharmacogenomic testing results using a published, color-coded decision support tool (DST) format as a standard stimulus to list possible medications.

Methods

Participants were randomly assigned to groups and asked to decide which psychotropic medication they would prefer if depressed. Three of the groups varied the color-coded category of fluoxetine and received a statement indicating that this was the most prescribed drug for depression. A fourth control condition omitted base rate information. Participants also provided detail about their decision-making processes through a qualitative interview.

Results

Comparison of the first three groups indicated that significantly more participants selected medications from the highest category of likely effectiveness when fluoxetine appeared in this list. Comparison of the control group to its relevant analogue suggested no significant differences in selection strategy. Qualitative interview responses indicated participant comfort with genetic testing despite awareness of having very limited understanding of these techniques and their implications.

Conclusions

Both DST color-coding and base rates were influential in driving drug selection decisions, despite most participants indicating they did not understand this information.

Innovation

Efforts to standardize pharmacogenomic stimuli may lead to advances in methods of studying quantifiable healthcare decisions. Attention to the context for presenting test results may also be a useful source of understanding patient responses, particularly regarding complex tests that are likely to be interpreted heuristically.

Limited Effect of Prevention Strategies on Incidence of Clinically Detectable Venous Thromboembolism After Lung Transplantation

BACKGROUND

Thromboembolic complications are common post-lung transplant, leading to significant morbidity. We instituted multiple interventions because of an observed 36.8% incidence of venous thromboembolism (VTE) (Incidence rate (IR) 5.74/1000 pt days) in our recipients.

METHODS

Our initiative commenced January 2015 with enoxaparin initiation within 6-8 hours of intensive care unit arrival and continuation for 4-6 weeks. We evaluated the IR of VTE in lung transplant recipients within 90 days of transplant. In 2017, the protocol was modified to extend the time to initiation of prophylaxis to within 72 hours of ICU arrival. In 2019, we further amended our intraoperative vascular access strategy.

RESULTS

Eighteen of 26 lung transplant recipients (LTR) met inclusion criteria in the 2015 cohort. Six of 18 (33.3%) developed VTE, 50% of which were upper extremity (UE), line associated. Fifty two of 75 LTR were eligible for enoxaparin prophylaxis in the 2017 cohort. Fifteen of 52 subjects (28.8%) developed VTE, 77.8% of which were UE and line associated. Despite improved adherence in 2017, there was little change in VTE IR (3.90/1000 pt days compared with 3.85/1000 pt days). Twenty six of 43 LTR met protocol inclusion criteria in the 2019 cohort. Ten subjects (38.5%) developed VTE, 67% of which were UE and line associated (IR 5.18/1000 pt days).

CONCLUSION

Our prospective study found that LTR remain at high risk for VTE despite aggressive prophylaxis with 4-6 weeks of enoxaparin and adjustment of vascular access approach. Alternative interventions should be investigated to minimize VTE development in this vulnerable population.

Willingness of people with cystic fibrosis receiving elexacaftor/tezacaftor/ivacaftor (ETI) to participate in randomized modulator and inhaled antimicrobial clinical trials

OBJECTIVE

To assess the feasibility of enrolling people with CF (pwCF) taking the CFTR modulator elexacaftor/tezacaftor/ivacaftor (ETI) in clinical trials of a new modulator.

METHODS

PwCF receiving ETI at CHEC-SC study (NCT03350828) enrollment were surveyed for interest in 2-week to 6-month placebo- (PC) and active-comparator (AC) modulator studies. Those taking inhaled antimicrobials (inhABX) were surveyed for interest in PC inhABX studies.

RESULTS

Of 1791 respondents, 75% [95% CI 73, 77] would enroll in a 2-week PC modulator study versus 51% [49, 54] for a 6-month study; 82% [81, 84] and 63% [61, 65] would enroll in 2-week and 6 month AC studies; 77% [74, 80] of 551 taking inhABX would enroll in a 2-week PC inhABX study versus 59% [55, 63] for a 6-month study. Previous clinical trial experience increased willingness.

CONCLUSIONS

Study designs will affect feasibility of future clinical trials of new modulators and inhABX in people receiving ETI.

PANC Study (Pancreatitis: A National Cohort Study): national cohort study examining the first 30 days from presentation of acute pancreatitis in the UK

BACKGROUND

Acute pancreatitis is a common, yet complex, emergency surgical presentation. Multiple guidelines exist and management can vary significantly. The aim of this first UK, multicentre, prospective cohort study was to assess the variation in management of acute pancreatitis to guide resource planning and optimize treatment.

METHODS

All patients aged greater than or equal to 18 years presenting with acute pancreatitis, as per the Atlanta criteria, from March to April 2021 were eligible for inclusion and followed up for 30 days. Anonymized data were uploaded to a secure electronic database in line with local governance approvals.

RESULTS

A total of 113 hospitals contributed data on 2580 patients, with an equal sex distribution and a mean age of 57 years. The aetiology was gallstones in 50.6 per cent, with idiopathic the next most common (22.4 per cent). In addition to the 7.6 per cent with a diagnosis of chronic pancreatitis, 20.1 per cent of patients had a previous episode of acute pancreatitis. One in 20 patients were classed as having severe pancreatitis, as per the Atlanta criteria. The overall mortality rate was 2.3 per cent at 30 days, but rose to one in three in the severe group. Predictors of death included male sex, increased age, and frailty; previous acute pancreatitis and gallstones as aetiologies were protective. Smoking status and body mass index did not affect death.

CONCLUSION

Most patients presenting with acute pancreatitis have a mild, self-limiting disease. Rates of patients with idiopathic pancreatitis are high. Recurrent attacks of pancreatitis are common, but are likely to have reduced risk of death on subsequent admissions.

The NIH-led research response to COVID-19

Investment, collaboration, and coordination have been key.

Characterizing CFTR modulated sweat chloride response across the cf population: Initial results from the CHEC-SC study

BACKGROUND

CHEC-SC is an ongoing epidemiologic study characterizing modulator-induced sweat chloride (SC) responses across the CF population, with interim results available prior to the availability of triple combination modulator therapy.

METHODS

Eligible participants had been prescribed a modulator for ≥90 days with re-enrollment allowed upon establishment of a new modulator. Pre-modulator SC values were obtained from chart review; post-modulator sweat was collected and analyzed locally. SC changes were descriptively summarized with biologic sex effects adjusted for age, weight, and CFTR genotype. Heterogeneity in ivacaftor SC response was characterized in relation to published CFTR functional responses.

RESULTS

1848 participants provided 2004 SC measurements, 26.2% on ivacaftor, 39.1% on lumacaftor/ivacaftor, and 34.7% on tezacaftor/ivacaftor. Average SC changes for all modulators were consistent with those reported in previous clinical studies, with greater variation in SC response observed among rarer mutations and notable shifts in the proportion with SC <60mmol/L independent of the magnitude of SC change. Ivacaftor induced in vitro CFTR functional change was significantly correlated with ivacaftor-modulated SC response (Pearson correlation= ‒0.52, 95% CI: ‒0.773, ‒0.129). Average SC change from ivacaftor to tezacaftor/ivacaftor was ‒4.9 mmol/L (n=17,95% CI:‒9.3, ‒0.5) and differed from those switching from lumacaftor/ivacaftor (10.0 mmol/L, n=139, 95% CI:7.8,12.3). Sex at birth was not associated with SC response.

CONCLUSIONS

CHEC-SC is the largest study characterizing modulator-induced SC changes across the CF population. There was a strong association between ivacaftor induced in vitro CFTR function and SC response across a genotypically heterogenous cohort. Biological sex was not associated with SC response.

Psychometric properties of the Spanish Child PTSD Symptom Scale for DSM-5-Self-Report in El Salvador

Conducting research in global applied settings necessitates the use of easily administered, brief, and evidentiary measures. One widely used, brief self-report measure of posttraumatic stress disorder (PTSD) symptoms in children and adolescents is the Child PTSD Symptom Scale for DSM-5-Self-Report (CPSS-5-SR). The present study examined the factor structure, measurement invariance, reliability, and convergent validity of the Spanish translation of the CPSS-5-SR in a sample of 1,296 third- through 12th-graders in El Salvador (M_age = 12.73 years, SD = 2.67, 55.2% female, 100.0% Latinx). This sample was collected as part of a government-led initiative to conduct broad school-based psychopathology screening, with the wider goal of introducing trauma-informed services into El Salvador's school system. Consistent with prior research, confirmatory factor analysis indicated that the four-factor DSM-5 model displayed a strong fit with the data. Measurement invariance by gender was also examined, with results showing invariance at the configural, metric, and scalar levels, indicating strong evidence that participants' patterns of response did not differ by gender. The results also indicated strong reliability, Cronbach's α = .91, and convergent validity with measures of commonly comorbid psychopathology, rs = .43-.68. Total scale norms derived from the current sample are provided. These findings highlight the considerable levels of posttraumatic stress experienced by Salvadorian youth and the importance of establishing evidentiary measures of psychopathology that can be used in diverse global populations. In particular, psychometric research represents the first step in augmenting efforts to screen, refer, and treat youth impacted by violence across the globe.

Cardiac resynchronization therapy in patients with a history of atrial fibrillation: insights from five major clinical trials

Funding Acknowledgements

Type of funding sources: Public Institution(s). Main funding source(s): National Heart, Lung, and Blood Institute

Background

Many patients with heart failure who are considered for cardiac resynchronization therapy (CRT) have a history of (h/o) atrial fibrillation (AF) but there are doubts about the efficacy of CRT in patients with AF.

Purpose

To investigate the association of CRT on morbidity and mortality among patients with and without a h/o AF.

Methods

Original, patient-level data from five clinical trials of CRT that permitted enrolment of patients with a h/o AF were included: COMPANION, MADIT-CRT, BLOCK HF, REVERSE, and MIRACLE trial. Patients with permanent or persistent AF were excluded from these trials, and therefore from this analysis. The outcomes of interest were the composite endpoint of time to heart failure hospitalization (HFH) or all-cause mortality or all-cause mortality alone. The association of CRT (versus no CRT) with outcomes for patients with and without a h/o AF was assessed using a Bayesian-Weibull survival regression model with random terms for the trial-specific treatment effects and the trial-specific baseline hazard functions including an interaction between history of paroxysmal AF and CRT. All results are presented as hazard ratios (HRs) with 95% posterior credible intervals (CIs) and posterior probabilities of no association, adjusting for baseline characteristics.

Results

A total of 4062 patients were included, 661 (16.3%) of whom had a h/o AF. Patients with a h/o AF were older (mean [SD] age 68 [10] years versus 64 [11] years) and had a higher proportion of ischemic cardiomyopathy (67% versus 53%, p&lt;0.001), a higher baseline serum creatinine (1.3 mg/dl versus 1.2 mg/dl, p&lt;0.001), and a lower left ventricular ejection fraction (25% versus 26%, p&lt;0.001). The HRs for all outcomes and the interaction term are shown in Table 1. For the overall population, CRT delayed the time to HFH or all-cause mortality (HR: 0.74, 95% CI: 0.62 – 0.87, p=0.005); for patients with a h/o AF, it did not (HR: 0.87, 95% CI: 0.64 to 1.19, p=0.37). In this patient-level meta-analysis, CRT was not associated with a reduction in mortality, overall or by h/o AF. Howevber, the interaction (estimate shown as a ratio of HRs) between those with or without a h/o AF and the effects of CRT was not significant for either outcome (Table 1).

Conclusion

In the largest post hoc analysis to date, we confirm the benefits of CRT in patients without a h/o AF in reducing HFH or mortality. There was no statistically significant interaction between CRT and h/o AF for any analysed outcome.

347 A Bit of a Headache: Management of Head Injuries in a District General Hospital

Aim

Head Injury is a common presentation in our DGH, which covers a large rural area and is now a regional trauma centre. We audited our management of head injuries against current guidelines and planned a new pathway to ensure patients receive the correct advice and follow up on discharge.

Method

Data was requested from IT for all head injury episodes in 2019, to reflect usual numbers pre-pandemic.

Electronic letters, radiology and notes were used to identify whether imaging criteria was met/carried out, discharge destinations, re-presentations, specialty discussions, and head injury advice on discharge.

Results

307 individual patients identified. 13 re-presentations. 10 required neurosurgical discussions

Destinations

226 (73.6%) discharged direct from ED. Admissions: Surgical - 37 (12%), Medical - 6 (2%), Paeds – 14 (4.5%), ITU 2 (0.7%), Did not wait – 2 (0.7%), Not Recorded – 7 (2.3%)

Imaging

100 patients met NICE criteria for CT, 100% were documented in notes and had CT. 76% reported normal, 18% had a bleed, contusion, or haematoma.

HI advice

90% of ED discharges, 16% of Surgical and 16% of medical discharges had head injury discharge advice documented

Conclusions

Guidelines were met for 100% of patients requiring imaging. Head injury advice was well documented in ED but fell down in ward paperwork. We have written a robust pathway where all inpatients have a proforma completed during admission with prompts for discharge advice and rehab referral where appropriate, this is currently undergoing a re-audit to ensure improvement and if successful will become an established part of the trauma pathway in our hospital.

238 The Use of MRCP in the Assessment of Choledocholithiasis in Patients Presenting with Symptomatic Gallstone Disease

Aim

Magnetic Resonance Cholangiopancreatography (MRCP) is the investigation of choice for choledocholithiasis; however, use is varied and guidelines vague. The National Institute for Health and Care (NICE) recommend MRCP when common bile duct (CBD) dilatation ≥ 8mm or liver function tests (LFTs) are abnormal but do not quantify this further. The Sunflower Study classifies patients as “high-risk” for choledocholithiasis if alanine aminotransferase (ALT) ≥ 80 IU/L, alkaline phosphatase (ALP) ≥ 200 IU/L or CBD ≥ 8mm. We aimed to assess compliance with NICE criteria and determine what biochemical abnormalities are most associated with choledocholithiasis.

Method

A retrospective analysis of inpatient MRCPs performed at QEH between March and May 2021 was performed (n = 72). Pre-MRCP bloods and imaging were used to assess concordance with NICE guidelines. We compared LFTs between patients with and without choledocholithiasis, looking for significant differences.

Results

84.7% of MRCPs were performed in accordance with NICE guidance, of which 31.1% demonstrated choledocholithiasis. No cases of choledocholithiasis were identified if NICE criteria were not fulfilled. A significant difference between the mean values of gamma glutamyltransferase (GGT) and ALP was noted between patients with and without choledocholithiasis.

Conclusions

We identified that the majority of MRCPs were performed in accordance with guidance. Significantly, no cases of choledocholithiasis were identified if these criteria were not met. Although our sample size was small, we found the most specific biochemical markers were ALP and GGT and propose that further research with larger cohorts may help develop a risk stratification tool to aid decision making.

Is comprehensive geriatric assessment hospital at home a cost-effective alternative to hospital admission for older people?

BACKGROUND

hospital level healthcare in the home guided by comprehensive geriatric assessment (CGA) might provide a less costly alternative to hospitalisation for older people.

OBJECTIVE

to determine the cost-effectiveness of CGA admission avoidance hospital at home (HAH) compared with hospital admission.

DESIGN/INTERVENTION

a cost-effectiveness study alongside a randomised trial of CGA in an admission avoidance HAH setting, compared with admission to hospital.

PARTICIPANTS/SETTING

older people considered for a hospital admission in nine locations across the UK were randomised using a 2:1 randomisation schedule to admission avoidance HAH with CGA (N = 700), or admission to hospital with CGA when available (N = 355).

MEASUREMENTS

quality adjusted life years, resource use and costs at baseline and 6 months; incremental cost-effectiveness ratios were calculated. The main analysis used complete cases.

RESULTS

adjusting for baseline covariates, HAH was less costly than admission to hospital from a health and social care perspective (mean -£2,265, 95% CI: -4,279 to -252), and remained less costly with the addition of informal care costs (mean difference -£2,840, 95% CI: -5,495 to -185). There was no difference in quality adjusted survival. Using multiple imputation for missing data, the mean difference in health and social care costs widened to -£2,458 (95% CI: -4,977 to 61) and societal costs remained significantly lower (-£3,083, 95% CI: -5,880 to -287). There was little change to quality adjusted survival.

CONCLUSIONS

CGA HAH is a cost-effective alternative to admission to hospital for selected older people.

P-BN22 The use of virtual clinics in gallbladder polyp surveillance

Background

Gallbladder polyps are common findings on ultrasound with a prevalence between 0.3-9.5%. Their significance is not clear but are theorised to have potential risk of transformation into gallbladder malignancy which have poor prognosis if not caught early. Current guidelines recommend surveillance of polyps and that laparoscopic cholecystectomy should be offered if certain criteria are met. Most patients are asymptomatic and regular reviews in clinic is time consuming for patients and adds to strain on services. This study looks at the use of virtual clinics in gallbladder polyp surveillance.

Methods

Since January 2019 patients identified with gallbladder polyps have been added to virtual clinic. Each patient is added to a database which is maintained by one upper GI surgeon. Current guidelines are followed: laparoscopic cholecystectomy is offered if polyps are greater than 1cm, there is an increase greater than 2mm between scans, and in high-risk groups or in symptomatic patients. All other patients are offered interval scans as per guidelines and a template letter is generated informing patients of their scan results and date of their follow up scan.

Results

Since January 2019, 70 patients have been identified to have gallbladder polyps. Of these 48 patients so far have benefitted from involvement from follow up in virtual clinic to date, this has resulted in 88 clinic appointments being saved. 12 patients have undergone laparoscopic cholecystectomy due to increase in size of their gallbladder polyps or secondary to symptoms. 7 patients have been lost to follow up, 2 discharged due to the gallbladder polyps disappearing and the other 49 remain under surveillance in the virtual clinic.

Conclusions

Long term polyp surveillance can be time consuming for both the patient and clinician. This model of a virtual clinic maintains clear communication with patients about their scan findings, the risks associated and plans for future scans. This is an efficient method of monitoring these patients that has good compliance and identifies patients appropriate for surgery.

P-BN21 Diagnostic accuracy of transabdominal ultrasound for assessing gallbladder polyps

Background

Gallbladder polyps are common findings on transabdominal ultrasound (TAUS) and their implications are not entirely clear. Current guidelines advise monitoring with serial TAUS and to offer laparoscopic cholecystectomy if criteria are met to minimise risk of malignant transformation. TAUS is easily accessible and useful at identifying gallbladder polyps, however, has limitations when differentiating between pseudopolyps and true gallbladder polyps with malignant potential. This study looks at a district general hospital’s outcomes for patients undergoing laparoscopic cholecystectomy for gallbladder polyps.

Methods

This retrospective study identified patients who had polyps identified on TAUS and subsequently undergone laparoscopic cholecystectomy from 2011 to 2021. We identified patients using hospital coding and subsequently assessed their pre-operative imaging and clinic letters to ensure gallbladder polyps were the reason for cholecystectomy. The size of polyp on TAUS was noted and pathology reports were assessed to determine if polyps had been correctly identified on TAUS and if these were true or pseudopolyps. Clinic letters were assessed to determine if patients were symptomatic pre-operatively.

Results

66 patients were identified as having polyps pre-operatively. The size of polyp ranged from 2-19mm with a mean of 7.4mm. 39 (59%) patients were symptomatic pre-operatively. TAUS findings correlated with pathology findings of polyps in 45 (68%) patients. Of the 21 patients with no polyps on pathology: 11 had gallstones, 9 had chronic cholecystitis and 1 normal gallbladder. Of the polyps identified 44 were pseudopolyps and only 1 was a true adenoma – 39 cholesterol polyps, 3 inflammatory polyps and 2 adenomyomatosis. There was no evidence of dysplasia on the adenoma, it measured 5mm on TAUS and the patient was symptomatic.

Conclusions

This study highlights the limitations of TAUS in correctly identifying true polyps. The 41% of asymptomatic patients all had benign findings on pathology and likely had no benefit from surgery. Whilst TAUS is a useful method of identifying potential polyps these findings would suggest that other methods of identifying true polyps should be sought to minimise patients undergoing unnecessary surgery.  

Identification of a novel cancer microbiome signature for predicting prognosis of human breast cancer patients

BACKGROUND

Prognosis of breast cancer (BC) patients differs considerably and identifying reliable prognostic biomarker(s) is imperative. With evidence that the microbiome plays a critical role in the response to cancer therapies, we aimed to identify a cancer microbiome signature for predicting the prognosis of BC patients.

METHODS

The TCGA BC microbiome data (TCGA-BRCA-microbiome) was downloaded from cBioPortal. Univariate and multivariate Cox regression analyses were used to examine association of microbial abundance with overall survival (OS) and to identify a microbial signature for creating a prognostic scoring model. The performance of the scoring model was assessed by the area under the ROC curve (AUC). Nomograms using the microbial signature, clinical factors, and molecular subtypes were established to predict OS and progression-free survival (PFS).

RESULTS

Among 1406 genera, the abundances of 94 genera were significantly associated with BC patient OS in TCGA-BRCA-microbiome dataset. From that set we identified a 15-microbe prognostic signature and developed a 15-microbial abundance prognostic scoring (MAPS) model. Patients in low-risk group significantly prolong OS and PFS as compared to those in high-risk group. The time-dependent ROC curves with MAPS showed good predictive efficacy both in OS and PFS. Moreover, MAPS is an independent prognostic factor for OS and PFS over clinical factors and PAM50-based molecular subtypes and superior to the previously published 12-gene signature. The integration of MAPS into nomograms significantly improved prognosis prediction.

CONCLUSION

MAPS was successfully established to have independent prognostic value, and our study provides a new avenue for developing prognostic biomarkers by microbiome profiling.

SP7.1.7 The impact of surgical subspecialisation on patient outcomes in those admitted with gallstone disease in the North of England: a retrospective cohort study

The management of gallstone disease has evolved over time and includes laparoscopic and open cholecystectomy, interventional radiology, endoscopic intervention and conservative management. Subspecialisation within general surgery is commonplace, allowing development of specialist skillsets. The aim of this study is to assess the impact of consultant subspecialisation on patient outcomes in those admitted with gallstone disease.

A retrospective cohort study - data was collected on patients admitted with gallstone disease in the North of England between 2002 and 2016. Subspecialisation was categorised as Upper GI or other general subspecialties. The primary outcome of interest was overall 30-day mortality; secondary outcomes included surgical approach and length of stay.

A total of 62,286 patients were admitted with gallstone disease. Overall 30-day mortality was 2.1%. The UGI specialists had a higher operative rate - 21.5% vs 10.7% (&lt;0.001) than their colleagues including performing more laparoscopic cholecystectomies– 15.6% vs 6.4% (&lt;0.001), and on-table cholangiogram (OTC) – 3.5% vs 1.5% (p &lt; 0.001).

22,071 patients were diagnosed with acute cholecystitis. Non-UGI Consultants preferred conservative management (76.5% vs 59.0% - p &lt; 0.001) which did not significantly affect 30-day mortality. Data was analysed using IBM SPSS Statistics. Categorical data were compared with chi-square test, and continuous data with t-test or ANOVA. Statistical significance was defined as a p value of ≤ 0.05.

UGI consultants performed significantly more “hot gallbladders” than their non-UGI counterparts. UGI consultants choose to operate laparoscopically and perform significantly more OTCs, likely reducing need for pre-operative MRCP but not significantly reducing overall 30-day mortality or length of stay.

Evaluating direct oral anticoagulants versus vitamin K antagonists for treatment of left ventricular thrombus: a systematic review and meta-analysis

Background/Introduction

Left ventricular thrombi are associated with high rates of stroke and systemic embolism (1). While vitamin K antagonists (VKAs) have historically been the anticoagulant of choice, they have a narrow therapeutic window and require frequent monitoring. Direct oral anticoagulants (DOACs) offer more predictable anticoagulation but the use of DOACs to treat left ventricular thrombus has not been well studied (1,2). Guideline recommendations around the topic are based on expert consensus and very low-quality evidence.

Purpose

This systematic review and meta-analysis compares DOACs or VKAs in the treatment of left ventricular thrombus. Outcomes of interest were stroke and systemic embolism, thrombus resolution, any bleeding, major bleeding, and mortality.

Methods

We searched CENTRAL, MEDLINE, EMBASE, CINAHL, ACPJC, and Web of Science for studies comparing DOACs and VKAs in the treatment of left ventricular thrombus. We also searched reference lists from included studies and relevant conferences' proceedings. Two reviewers independently screened titles and abstracts and then the full-text of potentially relevant citations in duplicate. They then extracted data and evaluated risk of bias in duplicate. The data was analyzed using Revman 5.3. We used the DerSimonian and Laird random-effects model to pool the weighted effect of estimates across all studies. The pooled relative risks (RRs) were calculated with corresponding 95% confidence intervals (CIs). We assessed the quality of evidence for each outcome using the Grading of Recommendations, Assessment, Development, and Evaluation approach.

Results

Of 443 citations screened, 12 observational studies (n=2,225) were included. We found no randomized controlled trial addressing the question. Most included studies were at high risk of bias due to unmatched baseline variables. We found no significant difference in any of our outcomes with DOACs versus VKAs: stroke and systemic embolism (RR 1.14, 95% CI [0.82, 1.58], p=0.43), thrombus resolution (RR 1.02, 95% CI [0.91, 1.15], p=0.69), any bleeding (RR 1.47, 95% CI [0.65, 3.33], p=0.36), major bleeding (RR 0.22, 95% CI [0.01, 4.21], p=0.32), and mortality (RR 0.99, 95% CI [0.67, 1.45], p=0.95). Evidence for each of these outcomes was of very low-quality due to risk of bias, inconsistency, and imprecision of the studies.

Conclusions

Very low quality evidence suggests no difference in outcomes with DOACs versus VKAs in the treatment of left ventricular thrombus. More robust data are needed to guide clinicians.

Funding Acknowledgement

Type of funding sources: None.

219 Have New National Guidelines Changed Practice in Referrals with Suspected Ureteric Colic?

Aim

To assess how many patients had a non-contrast CT as first-line investigation for suspected renal colic, and how this was affected by the release of the 2019 NICE guidelines. A secondary aim was to assess the proportion of patients who had CT KUBs that demonstrated a ureteric calculus.

Method

CT KUB scans performed over two separate 3 month periods were identified. These reflected periods of time before and after the new NICE guidelines. Electronic records were used to assess if the patients had an ultrasound performed as the initial diagnostic investigation, instead of a CT scan. The results of the scans were reviewed to identify if a ureteric or renal calculus had been positively identified.

Results

In the period before the new guidelines, 61 patients were scanned. 4 had an ultrasound to assess for a stone prior to a CT. All of these patients were medical inpatients. None of the ultrasounds diagnosed a stone. 22/61 patients had CT-proven stones (36%) In the period after the new guidelines, 79 patients were scanned. 12 had an ultrasound to assess for a stone prior to a CT. 8 were medical patients, 3 were surgical and 1 was gynaecological. 1 ultrasound diagnosed a stone. 28/79 patients had CT-proven stones (35.4%)

Conclusions

The release of new guidelines did not improved compliance with suggested imaging pathways. This clearly demonstrates an area for improvement. It is also worth noting that only 1/3 of referrals with suspected renal colic did actually have a stone, which has implications for specialty referral pathways.

Strategies to enhance routine physical activity in care home residents: the REACH research programme including a cluster feasibility RCT

Background

Care home residents are mainly inactive, leading to increased dependency and low mood. Although exercise classes may increase activity, a more sustainable model is to engage staff and residents in increasing routine activity.

Objectives

The objectives were to develop and preliminarily test strategies to enhance the routine physical activity of care home residents to improve their physical, psychological and social well-being through five overlapping workstreams.

Design

This trial had a mixed-methods research design to develop and test the feasibility of undertaking an evaluative study consisting of gaining an understanding of the opportunities for and barriers to enhancing physical activity in care homes (workstream 1); testing physical activity assessment instruments (workstream 2); developing an intervention through a process of intervention mapping (workstream 3); refining the provisional intervention in the care home setting and clarifying outcome measurement (workstream 4); and undertaking a cluster randomised feasibility trial of the intervention [introduced via three facilitated workshops at baseline (with physiotherapist input), 2 weeks (with artist input) and 2 months], with embedded process and health economic evaluations (workstream 5).

Setting

The trial was set in 12 residential care homes differing in size, location, ownership and provision in Yorkshire, UK.

Participants

The participants were elderly residents, carers, managers and staff of care homes.

Intervention

The intervention was MoveMore, designed for the whole home, to encourage and support the movement of residents in their daily routines.

Main outcome measures

The main outcome measures related to the feasibility and acceptability of implementing a full-scale trial in terms of recruitment and retention of care homes and residents, intervention delivery, completion and reporting of baseline data and outcomes (including hours of accelerometer wear, hours of sedentary behaviour and hours and type of physical activity), and safety and cost data (workstream 5).

Results

Workstream 1 – through a detailed understanding of life in a care home, a needs assessment was produced, and barriers to and facilitators of activity were identified. Key factors included ethos of care; organisation, management and delivery of care; use of space; and the residents’ daily routines. Workstream 2 – 22 (73.3%) out of 30 residents who wore a hip accelerometer had valid data (≥ 8 hours on ≥ 4 days of the week). Workstream 3 – practical mechanisms for increasing physical activity were developed, informed by an advisory group of stakeholders and outputs from workstreams 1 and 2, framed by the process of intervention mapping. Workstream 4 – action groups were convened in four care homes to refine the intervention, leading to further development of implementation strategies. The intervention, MoveMore, is a whole-home intervention involving engagement with a stakeholder group to implement a cyclical process of change to encourage and support the movement of residents in their daily routines. Workstream 5 – 12 care homes and 153 residents were recruited to the cluster randomised feasibility trial. Recruitment in the care homes varied (40–89%). Five care homes were randomised to the intervention and seven were randomised to usual care. Predetermined progression criteria were recruitment of care homes and residents (green); intervention delivery (amber); and data collection and follow-up – 52% of residents provided usable accelerometer data at 9 months (red), > 75% of residents had reported outcomes at 9 months (green, but self-reported resident outcomes were red), 26% loss of residents to follow-up at 9 months [just missing green criterion (no greater than 25%)] and safety concerns (green).

Limitations

Observations of residents’ movements were not conducted in private spaces. Working with care home residents to identify appropriate outcome measures was challenging. Take-up of the intervention was suboptimal in some sites. It was not possible to make a reliably informed decision on the most appropriate physical activity end point(s) for future use in a definitive trial.

Conclusions

A whole-home intervention was developed that was owned and delivered by staff and was informed by residents and staff. The feasibility of conducting a cluster randomised controlled trial was successfully tested: the target numbers of care homes and residents were recruited, demonstrating that it is possible to recruit care home residents to a cluster randomised trial, although this process was time-consuming and resource heavy. A large data set was collected, which provided a comprehensive picture of the environment, residents and staff in care homes. Extensive quantitative and qualitative work comprehensively explored a neglected area of health and social care research. Completion of ethnographic work in a range of settings enabled the production of an in-depth picture of life in care homes that will be helpful for other researchers considering organisational change in this setting.

Future work

The content and delivery of the intervention requires optimisation and the outcome measurement requires further refinement prior to undertaking a full trial evaluation. Consideration could be given to a recommended, simplified, core outcome set, which would facilitate data collection in this population.

Trial registration

Current Controlled Trials ISRCTN16076575.

Funding

This project was funded by the National Institute for Health Research (NIHR) Programme Grant for Applied Research programme and will be published in full in Programme Grant for Applied Research; Vol. 9, No. 9. See the NIHR Journals Library website for further project information.

Performance of passively pitching flapping wings in the presence of vertical inflows

The successful implementation of passively pitching flapping wings strongly depends on their ability to operate efficiently in wind disturbances. In this study, we experimentally investigated the interaction between a uniform vertical inflow perturbation and a passive-pitching flapping wing using a Reynolds-scaled apparatus operating in water at Reynolds number ≈3600. A parametric study was performed by systematically varying the Cauchy number (Ch) of the wings from 0.09 to 11.52. The overall lift and drag, and pitch angle of the wing were measured by varying the magnitude of perturbation fromJ_Vert= -0.6 (downward inflow) toJ_Vert= 0.6 (upward inflow) at eachCh, whereJ_Vertis the ratio of the inflow velocity to the wing's velocity. We found that the lift and drag had remarkably different characteristics in response to bothChandJ_Vert. Across allCh, while mean lift tended to increase as the inflow perturbation varied from -0.6 to 0.6, drag was significantly less sensitive to the perturbation. However effect of the vertical inflow on drag was dependent onCh, where it tended to vary from an increasing to a decreasing trend asChwas changed from 0.09 to 11.52. The differences in the lift and drag with perturbation magnitude could be attributed to the reorientation of the net force over the wing as a result of the interaction with the perturbation. These results highlight the complex interactions between passively pitching flapping wings and freestream perturbations and will guide the design of miniature flying crafts with such architectures.

Is Comprehensive Geriatric Assessment Admission Avoidance Hospital at Home an Alternative to Hospital Admission for Older Persons? : A Randomized Trial

BACKGROUND

Delivering hospital-level care with comprehensive geriatric assessment (CGA) in the home is one approach to deal with the increased demand for bed-based hospital care, but clinical effectiveness is uncertain.

OBJECTIVE

To assess the clinical effectiveness of admission avoidance hospital at home (HAH) with CGA for older persons.

DESIGN

Multisite randomized trial. (ISRCTN registry number: ISRCTN60477865).

SETTING

9 hospital and community sites in the United Kingdom.

PATIENTS

1055 older persons who were medically unwell, were physiologically stable, and were referred for a hospital admission.

INTERVENTION

Admission avoidance HAH with CGA versus hospital admission with CGA when available using 2:1 randomization.

MEASUREMENTS

The primary outcome of living at home was measured at 6 months. Secondary outcomes were new admission to long-term residential care, death, health status, delirium, and patient satisfaction.

RESULTS

Participants had a mean age of 83.3 years (SD, 7.0). At 6-month follow-up, 528 of 672 (78.6%) participants in the CGA HAH group versus 247 of 328 (75.3%) participants in the hospital group were living at home (relative risk [RR], 1.05 [95% CI, 0.95 to 1.15]; P = 0.36); 114 of 673 (16.9%) versus 58 of 328 (17.7%) had died (RR, 0.98 [CI, 0.65 to 1.47]; P = 0.92); and 37 of 646 (5.7%) versus 27 of 311 (8.7%) were in long-term residential care (RR, 0.58 [CI, 0.45 to 0.76]; P < 0.001).

LIMITATION

The findings are most applicable to older persons referred from a hospital short-stay acute medical assessment unit; episodes of delirium may have been undetected.

CONCLUSION

Admission avoidance HAH with CGA led to similar outcomes as hospital admission in the proportion of older persons living at home as well as a decrease in admissions to long-term residential care at 6 months. This type of service can provide an alternative to hospitalization for selected older persons.

PRIMARY FUNDING SOURCE

The National Institute for Health Research Health Services and Delivery Research Programme (12/209/66).

468 IMPROVING ADVANCE CARE PLANNING SKILLS IN JUNIOR DOCTORS

Introduction

Junior doctors are increasingly encountering Advance Care Planning (ACP) when they look after frail, older or multi-morbid patients during their hospital rotations. However, there remains a lack of formal training and resources, particularly with DNACPR discussions and when engaging patients and their loved ones with Emergency Health Care Planning (EHCP). We aimed to assess the need for ACP, improve the infrastructure by which ACP is delivered, and better support junior doctors to have these difficult conversations.

Method

Discharges from the Geriatrics Department at Kettering General Hospital were reviewed initially in May 2019 and again in January 2020 following intervention. We introduced a focused communication skills training session delivered at departmental teaching, which included a combination of simulation training and lectures. We additionally designed and implemented an EHCP template to aid junior doctors’ discussions. This could also be copied to the discharge letter, to facilitate safe transfer of care to primary care.

Results

In May 2019 of 32 patients, 100% met at least one SPICTTM criterion, with median of 4 criteria, thus indicating a high need for ACP in this cohort. Despite this, only one discharge letter included an EHCP and two had a request for GP colleagues to complete one. Evaluation of discharges again in January of 2020 reconfirmed a similar need for ACP, but following our interventions, the number of EHCP’s performed had increased. Of 22 identified patients 4 had a completed EHCP and 3 were requested for completion by their GP. Qualitative questionnaires demonstrated an improvement in both knowledge and confidence amongst junior doctors following the training session.

Conclusion

We have shown that there is a necessity for ACP to be considered for Geriatrics inpatients, and that providing structure and training in this challenging area offers benefit to both patients and junior doctors.

Development of polymorphic markers in the immune gene complex loci of cattle

The addition of cattle health and immunity traits to genomic selection indices holds promise to increase individual animal longevity and productivity, and decrease economic losses from disease. However, highly variable genomic loci that contain multiple immune-related genes were poorly assembled in the first iterations of the cattle reference genome assembly and underrepresented during the development of most commercial genotyping platforms. As a consequence, there is a paucity of genetic markers within these loci that may track haplotypes related to disease susceptibility. By using hierarchical assembly of bacterial artificial chromosome inserts spanning 3 of these immune-related gene regions, we were able to assemble multiple full-length haplotypes of the major histocompatibility complex, the leukocyte receptor complex, and the natural killer cell complex. Using these new assemblies and the recently released ARS-UCD1.2 reference, we aligned whole-genome shotgun reads from 125 sequenced Holstein bulls to discover candidate variants for genetic marker development. We selected 124 SNPs, using heuristic and statistical models to develop a custom genotyping panel. In a proof-of-principle study, we used this custom panel to genotype 1,797 Holstein cows exposed to bovine tuberculosis (bTB) that were the subject of a previous GWAS study using the Illumina BovineHD array. Although we did not identify any significant association of bTB phenotypes with these new genetic markers, 2 markers exhibited substantial effects on bTB phenotypic prediction. The models and parameters trained in this study serve as a guide for future marker discovery surveys particularly in previously unassembled regions of the cattle genome.

Effects of uniform vertical inflow perturbations on the performance of flapping wings

Flapping wings have attracted significant interest for use in miniature unmanned flying vehicles. Although numerous studies have investigated the performance of flapping wings under quiescent conditions, effects of freestream disturbances on their performance remain under-explored. In this study, we experimentally investigated the effects of uniform vertical inflows on flapping wings using a Reynolds-scaled apparatus operating in water at Reynolds number ≈ 3600. The overall lift and drag produced by a flapping wing were measured by varying the magnitude of inflow perturbation from J Vert = -1 (downward inflow) to J Vert = 1 (upward inflow), where J Vert is the ratio of the inflow velocity to the wing's velocity. The interaction between flapping wing and downward-oriented inflows resulted in a steady linear reduction in mean lift and drag coefficients,C ¯ L andC ¯ D , with increasing inflow magnitude. While a steady linear increase inC ¯ L andC ¯ D was noted for upward-oriented inflows between 0 < J Vert < 0.3 and J Vert > 0.7, a significant unsteady wing-wake interaction occurred when 0.3 ≤ J Vert < 0.7, which caused large variations in instantaneous forces over the wing and led to a reduction in mean performance. These findings highlight asymmetrical effects of vertically oriented perturbations on the performance of flapping wings and pave the way for development of suitable control strategies.

94 An Observational Cohort Study to Evaluate Volume and Severity of Emergency General Surgery Admissions During The COVID-19 Pandemic: Is There A “Lockdown” Effect?

Introduction

The COVID-19 pandemic has led to changes in NHS surgical service provision. This, combined with the government-imposed lockdown, may have impacted on patient attendance, severity of surgical disease, and outcomes. This study aimed to investigate a possible ‘lockdown’ effect on the volume and severity of surgical admissions and outcomes.

Method

Two cohorts of adult emergency general surgery admissions 30 days immediately before (16/2/2020 to 15/3/2020), and after UK government advice (16/3/2020 to 15/4/2020). Data were collected relating to patient characteristics, disease severity, clinical outcomes, and compared between these groups.

Results

Following lockdown, a significant reduction in median daily admissions from 7 to 3 (p < 0.001) was observed. Post-lockdown patients were significantly older, frailer with higher inflammatory indices and rates of AKI, and more likely to present with gastrointestinal cancer, obstruction, and perforation. Patients had significantly higher rates of Clavien-Dindo Grade ≥3 complications (p = 0.001), all-cause 30-day mortality (8.5% vs. 2.9%, p = 0.028), but no significant difference was observed in operative 30-day mortality.

Conclusions

There appears to be a “lockdown” effect on general surgical admissions with fewer admissions, more acutely unwell patients, and an increase in all-cause 30-day mortality. Patients should be advised to present promptly, and this should be reinforced for future lockdowns during the pandemic.

Longer-term health and social care strategies for stroke survivors and their carers: the LoTS2Care research programme including cluster feasibility RCT

Background

It is reported that the longer-term outcomes for stroke survivors are poor, with a range of unmet needs identified.

Objectives

The aims were to develop and test a longer-term stroke care strategy focused on improving the quality of life of stroke survivors and their carers by addressing unmet needs, and maintenance and enhancement of participation (i.e. involvement in life situations).

Design

Five overlapping workstreams were undertaken – (1) refinement of content by semistructured interviews with stroke survivors and their carers and by a review of the literature to inform content and delivery of the care strategy; (2) exploration of service models by national survey and focus groups with purposely selected services; (3) intervention development by interaction with a reference group of stroke survivors, carers, and health and social care professionals; (4) refinement and pilot implementation of the developed intervention in three stroke services (case studies); and (5) a cluster randomised controlled feasibility trial in 10 stroke services across England and Wales.

Setting

The intervention development work and feasibility trial were in stroke services (inclusive of primary, secondary, community and social care provision) across England and Wales.

Participants

Participants were stroke survivors resident in the community and their carers, and health and social care professionals in the included stroke services.

Data sources

Interviews with 28 stroke survivors and their carers at least 9 months post stroke ascertained their needs and the barriers to and facilitators of addressing those needs. Additional literature reviews identified 23 needs. No evidence-based interventions to address these needs were reported; self-management was highlighted as a possible delivery mechanism. In workstream 2, a national survey revealed that the most common model of stroke service provision was care up to 12 months post stroke, reported by 46 (40%) services. Thirty-five (30%) services provided care up to 6 months post stroke and 35 (30%) provided care beyond 12 months, thus identifying 6 months post stroke as an appropriate delivery point for a new intervention. Through focus groups in a range of services, stroke survivors’ perceived unmet needs and the barriers to and enablers of service provision were identified.

Intervention

Using information obtained in workstreams 1 and 2 and working closely with a stakeholder reference group, we developed an intervention based on the unmet needs prioritised by stroke survivors and their carers (workstream 3). In workstream 4, action groups (clinicians, stroke survivors and researchers) were established in three stroke services that led implementation in their service and contributed to the iterative refinement of the intervention, associated training programme and implementation materials. The intervention (called New Start) was delivered at 6 months post stroke. Key components were problem-solving self-management with survivors and carers, help with obtaining usable information, and helping survivors and their carers build sustainable, flexible support networks.

Results

A cluster randomised feasibility trial (workstream 5) was successfully implemented in 10 stroke services across England and Wales, with associated process and health economic evaluations. Five services were randomised to provide New Start, while five continued with usual care; 269 participants were recruited. Progression criteria – in terms of our pre-determined (red, amber, green) criteria for progress to a full trial: target stroke survivor recruitment rates were achieved, on average, across sites (24.1 per site over 6 months, green); 216 (80.3%) registered stroke survivors returned follow-up questionnaires at 9 months (84.1% in the intervention arm and 75.8% in the usual care arm, green); according to data reported by sites, overall, 95.2% of registered stroke survivors were offered at least one session of the intervention (green); all five intervention sites had at least two facilitators deemed competent, delivered the New Start intervention and provided it to stroke survivors (green). However, at some sites, there were concerns regarding the number of stroke survivors being offered, accepting and receiving the intervention. Only small differences in outcomes and costs were observed between the New Start and usual care groups, and considerable uncertainty around the cost-effectiveness remains.

Conclusions

We report a complex programme of work that has described the longer-term needs of stroke survivors and highlighted evidence and service gaps. Working closely with stroke survivors, an intervention was developed that has been refined in three services and feasibility tested in a cluster randomised controlled trial. Further refinement of the target population and optimisation of the intervention materials is required prior to a full randomised controlled trial evaluation.

Future work

Optimisation of the intervention, and clearer specification of recipients, are required prior to a full trial evaluation.

Trial registration

Current Controlled Trials ISRCTN38920246.

Funding

This project was funded by the National Institute for Health Research (NIHR) Programme Grants for Applied Research programme and will be published in full in Programme Grants for Applied Research; Vol. 9, No. 3. See the NIHR Journals Library website for further project information.

The Prevention of Delirium system of care for older patients admitted to hospital for emergency care: the POD research programme including feasibility RCT

Background

Delirium is a distressing, common and serious condition in older people in hospital. Evidence suggests that it could be prevented in about one-third of patients using multicomponent interventions targeting delirium risk factors, but these interventions are not yet routinely available in the NHS.

Objective

The objective was to improve delirium prevention for older people admitted to the NHS.

Design

Project 1 comprised case studies employing qualitative methods (observation, interviews, workshops) in three NHS hospitals to develop the Prevention of Delirium system of care. Project 2 comprised case studies using mixed methods in five NHS hospitals to test the Prevention of Delirium implementation, feasibility and acceptability, and to modify the Prevention of Delirium system of care. Project 3 comprised a multicentre, cluster randomised, controlled, pragmatic feasibility study in eight hospitals, with embedded economic evaluation, to investigate the potential clinical effectiveness and cost-effectiveness of the Prevention of Delirium system of care, compared with standard care, among older patients admitted to hospital for emergency care. The primary objectives related to gathering information to design a definitive trial. Criteria for progression to a definitive trial were as follows: a minimum of six wards (75%) completing the Prevention of Delirium manual milestone checklist and an overall recruitment rate of at least 10% of the potential recruitment pool.

Setting

This study was set in NHS general hospitals.

Participants

In project 1, participants were staff, volunteers, and patient and carer representatives. In project 2, participants were staff, volunteers, patients and carers. In project 3, participants were older patients admitted to elderly care and orthopaedic trauma wards.

Intervention

The developed intervention (i.e. the Prevention of Delirium system of care).

Main outcome measures

For the feasibility study (project 3), the primary outcome measure was the Confusion Assessment Method. The secondary outcome measures were the Nottingham Extended Activities of Daily Living scale, the Clinical Anxiety Scale and the Geriatric Depression Scale Short Form.

Results

Project 1: understanding of delirium prevention was poor. Drawing on evidence, and working with ward teams, we developed the Prevention of Delirium system of care, which targeted 10 delirium risk factors. This multicomponent intervention incorporated systems and mechanisms to introduce and embed delirium prevention into routine ward practices. Project 2: five out of six wards implemented or partially implemented the Prevention of Delirium intervention. A prominent role for hospital volunteers was intended, but most wards were unable to recruit or sustain the numbers needed. We identified four conditions necessary to implement and deliver the Prevention of Delirium intervention: (1) commitment of senior nurse, (2) a named person to drive implementation forward, (3) dedicated time (1 day per week) of an experienced nurse to lead implementation and (4) adequate ward staffing levels. Overall, the intervention was acceptable to staff, volunteers, patients and carers, and did not increase nursing staff workload. In the light of these findings, the Prevention of Delirium system of care was modified for use in project 3. Project 3: 16 wards in eight hospitals (two wards per hospital) were recruited. Out of 4449 patients screened, 3274 (73.6%) were eligible and 713 were registered, resulting in a recruitment rate of 16.0%. Thirty-three (4.6%) participants withdrew. The screened and registered participants were similar, but some between-treatment group imbalances were noted among those registered to the trial. All eight wards allocated to the intervention group completed the Prevention of Delirium manual milestone checklist and delivered the Prevention of Delirium intervention (median time 18.6 weeks for implementation). Overall, fidelity to the intervention was assessed as being high in two wards, medium in five wards and low in one ward. Of the expected 5645 Confusion Assessment Method delirium assessments, 5065 (89.7%) were completed during the first 10 days of admission. The rates of return of the patient-reported questionnaire booklets were 98.0% at baseline, 81.8% at 30 days and 70.5% at 3 months. The return rate of the EuroQol-5 Dimensions questionnaire was 98.6% at baseline, 77.5% at 1 month and 65.3% at 3 months (94–98% fully completed). The completion rate of the resource use questionnaire was lower (48.7%). The number of people with new-onset delirium at 10 days was 24 (7.0%) in the Prevention of Delirium group and 33 (8.9%) in the control group. Multilevel logistic regression analysis showed that participants in the Prevention of Delirium group had non-significant lower odds of developing delirium (odds ratio 0.68, 95% confidence interval 0.37 to 1.26; p = 0.2225). The average cost of the Prevention of Delirium intervention was estimated as £10.98 per patient and the mean costs for the Prevention of Delirium and usual-care groups were £5332 and £4412, respectively, with negligible between-group differences in quality-adjusted life-years. There was conflicting evidence from the trial- and model-based analyses relating to the cost-effectiveness of the Prevention of Delirium intervention. Given this, and in view of issues with the data (e.g. high levels of missingness), the results from the economic evaluation are highly uncertain. The criteria for continuation to a future definitive randomised controlled trial were met. Such a trial would need to recruit 5200 patients in 26 hospital clusters (200 patients per cluster).

Conclusions

The Prevention of Delirium system of care was successfully developed, and a multicentre feasibility study showed that the intervention is capable of implementation and delivery in routine care, with acceptable intervention fidelity and preliminary estimate of effectiveness.

Limitations

A prominent role for volunteers was originally intended in the Prevention of Delirium system of care, but only three of the eight wards allocated to the trial intervention group involved volunteers.

Future work

The findings indicate that a definitive multicentre evaluation of the Prevention of Delirium system of care should be designed and conducted to obtain robust estimates of clinical effectiveness and cost-effectiveness.

Trial registration

Current Controlled Trials ISRCTN28213290 (project 1), ISRCTN65924234 (project 2) and ISRCTN01187372 (project 3).

Funding

This project was funded by the National Institute for Health Research (NIHR) Programme Grants for Applied Research programme and will be published in full in Programme Grants for Applied Research; Vol. 9, No. 4. See the NIHR Journals Library website for further project information.

Knowledge Exchanges and Decision-Making Within Hospital Dementia Care Triads: An Ethnographic Study

Background and Objectives

Important decisions about the future care of people living with dementia are routinely made in hospitals. Very little is known about how the care needs of hospitalized people with dementia are understood, or how the perspectives of the person, families, and staff intersect to inform decision-making. This study explores how the care needs of people with dementia are understood by the person, their family, and hospital staff (the care triad), and how these perspectives shape decision-making.

Research Design and Methods

Ethnographic data were collected from 2 care-of-older-people general hospital wards via observations, conversations, and interviews with people with dementia, families, and staff. In total, 400 hr of observation and 46 interviews were conducted across two 7- to 9-month periods.

Results

The person’s care needs were often understood differently between and within arms of the care triad. A lack of consistent engagement with families and people with dementia reduced opportunities to recognize and integrate this range of views, leading to delays or difficulties in decision-making. People with dementia, particularly those lacking capacity, were most likely to have their perspectives overlooked.

Discussion and Implications

Early engagement with people with dementia and their families is required to ensure that all perspectives on the person’s current and future care needs are understood and represented during decision-making. Particular attention should be paid to involving people living with dementia in discussions and decisions about their care, and to the assessment and involvement of people who may lack capacity.

Rates of genetic testing in patients prescribed drugs with pharmacogenomic information in FDA-approved labeling

This study examined rates of genetic testing in two cohorts of publicly insured individuals who have newly prescribed medication with FDA pharmacogenomic labeling guidance. Genetic testing was rare (4.4% and 10.5% in Medicaid and Medicare cohorts, respectively) despite the fact that all participants selected were taking medications that contained pharmacogenomic labeling information. When testing was conducted it was typically done before the initial use of a target medication. Factors that emerged as predictors of the likelihood of undergoing genetic testing included White ethnicity (vs. Black), female gender, and age. Cost analyses indicated higher expenditures in groups receiving genetic testing vs. matched comparators with no genetic testing, as well as disparities between proactively and reactively tested groups (albeit in opposite directions across cohorts). Results are discussed in terms of the possible reasons for the low base rate of testing, mechanisms of increased cost, and barriers to dissemination and implementation of these tests.