Olivia Dalleur

• Catholic University of Louvain

Background: In the field of psychiatry, the dissemination of clinical innovations greatly depends on the social capital of clinicians. An instrument specifically aimed at measuring their professional social capital therefore needs to be developed. Methods: This survey was conducted to develop and validate the Resource Generator for Psychiatrists...

Background Benin's healthcare system is characterized by a lack of local guidelines for surgical antibiotic prophylaxis (SAP), which is essential to prevent surgical site infection. Aim To audit compliance for SAP practices in gastrointestinal surgery. Methods Data were prospectively collected from gastrointestinal surgery departments in five hos...

Limited data are available on characteristics associated with antipsychotic use in multimorbid older adults. Primary: to identify patient characteristics associated with antipsychotic prescribing in a multimorbid population of older inpatients with polypharmacy. Secondary: (1) to observe if antipsychotics use during an index hospitalisation was ass...

Introduction: Benzodiazepines and sedative hypnotics (BSHs) may represent a threat to patient safety, especially among older adults. The project BE-SAFE (Implementing a patient-centred and evidence-based intervention to reduce BEnzodiazepine and sedative-hypnotic use to improve patient SAFEty and quality of care) is a 5-year research project funded...

Background: Drug-related readmissions (DRAs) are defined as rehospitalizations with an adverse drug event as their main or significant contributory cause. DRAs represent a major adverse health burden for older patients. A prediction model which identified older hospitalized patients at high risk of a DRA <1 year was previously developed using the...

Background. Limited data are available on characteristics associated with antipsychotic’s use in multimorbid older adults. Aims. (1) To identify factors associated with antipsychotic prescribing in older inpatients, (2) to assess the association between antipsychotic use and drug-related readmission (DRA) within one year. Method. This is a second...

Methicillin-resistant Staphylococcus aureus (MRSA) constitutes a serious public health concern, with a considerable impact on patients’ health, and substantial healthcare costs. In this study, patients and healthcare workers (HCWs) from six public hospitals in Benin were screened for MRSA. Strains were identified as MRSA using conventional microbio...

Introduction Psychiatrists need access to professional resources to care for their patients. In mental health settings, clinical innovations such as a new therapeutic approach, clinical guidelines or new drugs can diffuse more or less, depending on the social capital of these clinicians. The Resource Generator developed by Snijders & Van Der Gaag (...

Methicillin-resistant Staphylococcus aureus (MRSA) constitutes a serious public health concern with a considerable impact on patients' health and substantial healthcare costs. In this study, patients, and healthcare workers (HCWs)from six public hospitals in Benin were screened for MRSA. Strains were identified as MRSA using conventional microbiolo...

Combating antimicrobial resistance (AMR) is among the 10 global health issues identified by the World Health Organization (WHO) in 2021. While AMR is a naturally occurring process, the inappropriate use of antibiotics in different settings and legislative gaps has led to its rapid progression. As a result, AMR has grown into a serious global menace...

Background: Benzodiazepine receptor agonists (BZRAs) are commonly prescribed in older adults despite an unfavorable risk-benefit ratio. Hospitalizations may provide a unique opportunity to initiate BZRA cessation, yet little is known about cessation during and after hospitalization. We aimed to measure the prevalence of BZRA use before hospitaliza...

Background: Proton pump inhibitors (PPIs) contribute to polypharmacy and are associated with adverse effects. As prospective data on longitudinal patterns of PPI prescribing in older patients with multimorbidity are lacking, we sought to assess patterns of PPI prescribing and deprescribing, as well as the association of PPI use with hospital admis...

Background/purpose: Caffeine is the most commonly used psychostimulant worldwide. Although its large intake is suspected to worsen psychotic symptoms because of increasing dopamine neurotransmission, schizophrenic patients are heavier caffeine consumers than the general population. This study aims to assess the impact of a caffeine restriction pol...

Background: Hand Hygiene (HH) is widely recognized to be one of the most successful and cost-effective measures for reducing the incidence of healthcare-associated infections (HAIs). The hand hygiene behavior of hospital healthcare workers (HCWs) is not well-documented in Benin. Therefore, Theoretical Domains Framework (TDF) was used to identify t...

Background : Antipsychotic polypharmacy (APP) is common worldwide in schizophrenia, while switch to antipsychotic monotherapy reduces adverse effects. Canada has been the leader in deprescribing policies in the last decades. Aims : To detect factors, including countries, associated with successful antipsychotic deprescribing after a psychiatric hos...

Introduction A high prevalence of antipsychotic polypharmacy (APP) and low utilisation of clozapine is considered as inappropriate prescribing that can lead to suboptimal treatment, increased risk of poor response or adverse effects. Objectives To explore the evolution of prevalence of APP and associated factors as well as clozapine prescribing pa...

Background Antipsychotic polypharmacy (APP) prescribing and clozapine underuse are considered inappropriate prescribing in schizophrenia. Psychiatric hospitalisations may be suitable occasions to re-evaluate patient pharmacotherapy and to switch to monotherapy. Objectives To explore the evolution of APP and other psychotropic prescribing patterns...

The rise of multidrug-resistant (MDR) pathogens has become a global health threat and an economic burden in providing adequate and effective treatment for many infections. This large-scale concern has emerged mainly due to mishandling of antibiotics (ABs) and has resulted in the rapid expansion of antimicrobial resistance (AMR). Nowadays, there is...

Importance: The most appropriate therapy for older adults with multimorbidity may depend on life expectancy (ie, mortality risk), and several scores have been developed to predict 1-year mortality risk. However, often, these mortality risk scores have not been externally validated in large sample sizes, and a head-to-head comparison in a prospecti...

A low adherence to recommendations on antibiotic prophylaxis has been reported worldwide. Since 2009, cesarean sections have been performed under user fee exemption in Benin with a free kit containing the required supplies and antibiotics for prophylaxis. Despite the kit, the level of antibiotic prophylaxis achievement remains low. We conducted a c...

Substandard and falsified medicines are an enormous threat to global health. Poor quality antibiotic preparations contribute to the development of antimicrobial resistance. In surgery, where the occurrence of healthcare-associated infections is high, healthcare teams need to rely on the quality of antibiotic prophylaxis to prevent infections. We as...

The intense use and misuse of antibiotics is undoubtedly the main factor associated with the high numbers of antibiotic-resistant pathogenic and commensal bacteria worldwide. In low-income countries, this misuse and overuse is widespread, with great consequences at the personal and global levels. In the context of user fee exemptions in caesarean s...

Aim: To explore the evolution of antipsychotic polypharmacy (APP) and other psychotropic prescribing patterns during psychiatric hospitalisations, to detect characteristics associated with APP on admission and at discharge, and to examine clozapine prescribing patterns. Methods: Data on adult inpatients diagnosed with schizophrenia spectrum disorde...

Background A patient-centred approach to medicines optimisation is considered essential. The OPtimising thERapy to prevent Avoidable hospital admissions in Multimorbid older people (OPERAM) trial evaluated the effectiveness of medication review with shared decision-making (SDM) in older people with multimorbidity. Beyond evaluating the clinical eff...

Objective To evaluate the agreement of hospital physicians and older patients with individualised STOPP/START-based medication optimisation recommendations from a pharmacotherapy team. Methods This study was embedded within a large European, multicentre, cluster randomised controlled trial examining the effect of a structured medication review on...

Background: Estimating life expectancy of older adults informs whether to pursue future investigation and therapy. Several models to predict mortality have been developed but often require data not immediately available during routine clinical care. The HOSPITAL score and the LACE index were previously validated to predict 30-day readmissions but...

Background and importance Surgical patients are exposed to infections, especially surgical site infections, which is a burden for public health. To prevent and cure these infections, surgical teams and patients refer to antimicrobials whose inappropriate use leads to an increase in antimicrobial resistance. Aim and objectives We interviewed some p...

Background: Identifying patients at high risk of drug-related hospital admission (DRA) may help to efficiently target preventive interventions. We developed a score to predict DRAs in older patients with multimorbidity and polypharmacy. Methods: We used participants from the multicenter European OPERAM trial ("Optimising PharmacothERapy in the M...

An alarming worldwide increase in antimicrobial resistance is complicating the management of surgical site infections (SSIs), especially in low-middle income countries. The main objective of this study was to describe the pattern of carbapenem-resistant bacteria in hospitalized patients and to highlight the challenge of their detection in Benin. We...

Background The Screening Tool of Older Persons’ Prescriptions (STOPP)/Screening Tool to Alert to Right Treatment (START) instrument is used to evaluate the appropriateness of medication in older people. STOPP/START criteria have been converted into software algorithms and implemented in a clinical decision support system (CDSS) to facilitate their...

The increasing worldwide prevalence of extended-spectrum beta-lactamase (ESBL) producing Escherichia coli constitutes a serious threat to global public health. Surgical site infections are associated with high morbidity and mortality rates in developing countries, fueled by the limited availability of effective antibiotics. We used whole-genome seq...

Background identifying drug-related hospital admissions (DRAs) in older people is difficult. A standardised chart review procedure has recently been developed. It includes an adjudication team (physician and pharmacist) screening using 26 triggers and then performing causality assessment to determine whether an adverse drug event (ADE) occurred (se...

Background Older adults with chronic conditions are at high risk of complications from influenza and pneumococcal infections. Evidence about factors associated with influenza and pneumococcal vaccination among older multimorbid persons in Europe is limited. The aim of this study was to investigate the prevalence and determinants of these vaccinatio...

N = 351) Background Drug-drug interactions (DDIs) are highly prevalent in older patients but little is known about prevalence of DDIs over time. Our main objective was to assess changes in the prevalence and characteristics of drug-drug interactions (DDIs) during a one-year period after hospital admission in older people, and associated risk facto...

Objectives: Antipsychotic polypharmacy (APP) is common worldwide in the treatment of schizophrenia. We aimed at describing APP during psychiatric hospitalization in Belgium and comparing it to the European practice. Methods: We collected retrospective data from 5 hospitals in 2020-2021. The inclusion criteria were adult inpatients, hospitalized in...

Background Polypharmacy may result in medication-related readmissions (MRRs). Identifying MRRs is time consuming. Screening of readmissions by students could increase efficiency for healthcare professionals. Recently, two screening tools have been published: the Assessment Tool for identifying Hospital Admissions Related to Medications (AT-HARM10)...

Background Recommendations for individualised glycaemic management in older people with type 2 diabetes (T2D) have recently been provided in clinical practice guidelines (CPGs) issued by major scientific societies. The aim of this systematic review is to compare the content of these recommendations concerning health assessment, targets for glycaemi...

Objective To examine the effect of optimising drug treatment on drug related hospital admissions in older adults with multimorbidity and polypharmacy admitted to hospital. Design Cluster randomised controlled trial. Setting 110 clusters of inpatient wards within university based hospitals in four European countries (Switzerland, Netherlands, Belg...

The European Commission's 2019 report regarding the state of health profiles highlighted the fact that Romania is among the countries with the lowest life expectancy in the European Union. Therefore, the objectives of the present study were to assess the current prescription habits of general physicians in Romania related to medicines taken by the...

Objectives: We aimed to establish an explicit list of potentially clinically significant drug-drug interactions (DDIs) in people aged >65 years. Design: A preliminary list of potentially clinically significant DDIs was compiled, based on 154 DDIs identified from literature review. Subsequently, a 2-round online Delphi survey was undertaken with a...

What is known and objective Prescribing errors are the leading cause of adverse drug events in hospitalized patients. Pharmaceutical validation, defined as the review of drug orders by a pharmacist, associated with clinical decision support (CDS) systems, significantly reduces these errors and adverse drug events. In Belgium, because clinical pharm...

Older people are frequently exposed to polypharmacy, inappropriate prescribing, and adverse drug events. Two clinical processes can help geriatricians to optimize and increase the safety of drug prescriptions for older adults: medication reconciliation and medication review. Medication reconciliation provides the best possible medication history an...

Objective: To assess the efficacy of medication review as an isolated intervention and with several co-interventions for preventing hospital readmissions in older adults. Methods: Ovid MEDLINE, Embase, The Cochrane Central Register of Controlled Trials and CINAHL were searched for randomized controlled trials evaluating the effectiveness of medi...

Background Carbapenem-resistant Acinetobacter baumannii is considered a top priority pathogen by the World Health Organization for combatting increasing antibiotic resistance and development of new drugs. Since it was originally reported in Klebsiella pneumoniae in 2009, the quick spread of the bla NDM-1 gene encoding a New-Delhi metallo-beta-lacta...

Background Surgical site infections are related to high morbidity, mortality and healthcare costs. Because the emergence of multidrug-resistant bacteria in hospitals is becoming a worldwide challenge for surgeons who treat healthcare-associated infections, we wished to identify the causative agents involved in these infections and the rate of multi...

Background The STOPPFrail criteria were developed to assist physicians in deprescribing medications among frail patients approaching end of life. We aimed to measure the prevalence of potentially inappropriate medications (PIMs) and to describe changes over time, using STOPPFrail, in frail nursing home residents (NHRs) with limited life expectancy...

Background: Surgical site infections remain common and widespread; they contribute to increasing antimicrobial resistance among the etiological agents. Antimicrobial resistance is the ability of a microorganism like bacteria to stop an antimicrobial from working against it. This study was conducted to determine the spectrum of bacterial isolates fr...

Background: The EQ-5D-3L and EQ-5D-5L are two generic health-related quality of life measures, which may be used in clinical and health economic research. They measure impairment in 5 aspects of health: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. The aim of this study was to assess the performance of the EQ-5D-3L...

Background Glucose-lowering therapy (GLT) should be individualized in older patients with type 2 diabetes (T2D) according to their health status and their life expectancy. This study aimed at assessing the inappropriateness of GLT prescribing and the one-year mortality rate in geriatric patients with T2D. Methods Retrospective cohort study of cons...

Background Carbapenem-resistant Acinetobacter baumannii is considered a top priority pathogen by the World Health Organization for combatting increasing antibiotic resistance and development of new drugs. Since it was originally reported in Klebsiella pneumoniae in 2009, the quick spread of the blaNDM−1 gene encoding a New-Delhi metallo-beta-lactam...

Background: Carbapenem-resistant Acinetobacter baumannii is considered a top priority pathogen by the World Health Organization for combatting increasing antibiotic resistance and development of new drugs. Since it was originally reported in Klebsiella pneumoniae in 2009, the quick spread of the blaNDM-1 gene encoding a New-Delhi metallo-beta-lacta...

Background: Surgical site infections are related to high morbidity, mortality and healthcare costs. Because the emergence of multidrug-resistant bacteria in hospitals is becoming a worldwide challenge for surgeons who treat healthcare-associated infections, we wished to identify the causative agents involved in these infections and the rate of mult...

Background: Surgical site infections are related to high morbidity, mortality and healthcare costs. As the emergence of multidrug-resistant bacterial pathogens in hospitals is becoming a worldwide challenge for surgeons who treat healthcare-associated infections, we wished to identify the causative agents involved in surgical site infections and th...

Clinical decision support systems (CDSS) fail to prevent adverse drug events (ADE), notably due to over-alerting and alert-fatigue. Many methods have been proposed in the literature to reduce over-alerting of CDSS: enhancing post-alert medical management, taking into account user-related context, patient-related context and temporal aspects, improv...

Background: Hand Hygiene (HH) has been described as the cornerstone and starting point in all infection control. Compliance to HH is a fundamental quality indicator. The aim of this study was to investigate the HH compliance among Health-care Workers (HCWs) in Benin surgical care units. Methods: A multicenter prospective observational study was...

BACKGROUND Drug-drug interactions (DDIs) involving vitamin K antagonists (VKAs) constitute an important cause of in-hospital morbidity and mortality. However, the list of potential DDIs is long; the implementation of all these interactions in a clinical decision support system (CDSS) results in over-alerting and alert fatigue – limiting the benefit...

Background Drug-drug interactions (DDIs) involving vitamin K antagonists (VKAs) constitute an important cause of in-hospital morbidity and mortality. However, the list of potential DDIs is long; the implementation of all these interactions in a clinical decision support system (CDSS) results in over-alerting and alert fatigue, limiting the benefits...

Background Rational use of medications and monitoring of prescriptions in elderly patients is important to decrease the number and duration of hospitalizations, emergency medical consultations, mortality, as well as medical costs. Purpose To identify potentially inappropriate medications (PIMs) and potential prescription omissions (PPOs), and dete...

Background: Several approaches to medication optimisation by identifying drug-related problems in older people have been described. Although some interventions have shown reductions in drug-related problems (DRPs), evidence supporting the effectiveness of medication reviews on clinical and economic outcomes is lacking. Application of the STOPP/STA...

Background and importance According to the WHO, care associated infections (CAIs) affect at least 2 million patients worldwide annually. In this African country, common CAIs are surgery site infections (SSI; 24.7% among inpatients in the south of the country). To prevent SSIs, appropriate use of antibiotics is essential. Aim and objectives To audi...

Background Thrombospondin-1 (TSP-1) is a matricellular functional protein of the extracellular matrix. As it is not constitutively present extracellularly, its secretion is enhanced in several situations, namely injury, chronic pathology, tissue remodeling, angiogenesis, and aging. Over the last decade, TSP-1 has been reported to be involved in com...

Introduction: Multimorbidity and polypharmacy are important risk factors for drug-related hospital admissions (DRAs). DRAs are often linked to prescribing problems (overprescribing and underprescribing), as well as non-adherence with drug regimens for different reasons. In this trial, we aim to assess whether a structured medication review compare...

Background Older persons are at significant risk of drug-related admissions (DRAs). We previously demonstrated that 27% of hospitalizations in geriatric patients were associated with potentially inappropriate medicines (PIMs) and/or potential prescribing omissions (PPOs) identified by the Screening Tool of Older People’s Prescriptions/Screening Too...

In the original publication of an article, the corresponding author name has been swapped. Now the correct name has been published in this correction.

Introduction Atrial fibrillation (AF) is a cardiac arrhythmia that is associated with a higher risk of thromboembolic events, e.g. stroke. The prevention of thromboembolic events relies on the initiation of antithrombotic therapy, including oral anticoagulants (OAC). According to guidelines, patients at high risk of thromboembolic event, as defined...

Aim: We aimed to develop a standardized chart review method to identify drug-related hospital admissions (DRA) in older people caused by non-preventable adverse drug reactions and preventable medication errors including overuse, underuse and misuse of medications: the DRA adjudication guide. Methods: The DRA adjudication guide was developed base...

Background A clinical decision support system (CDSS) linked to the computerized physician order entry may help improve prescription appropriateness in inpatients with renal insufficiency. Objective To evaluate the impact on prescription appropriateness of a CDSS prescriber alert for 85 drugs in renal failure patients. Setting Before-after study in...

Aims: To determine the preventability of serious adverse drug reactions (ADR) related to the use of direct oral anticoagulants (DOAC), and to explore contributing factors to preventable ADRs. Results were compared with vitamin K antagonists (VKA). Methods: We conducted a prospective observational study in the emergency departments of two teachin...

Background: Comparisons of clinical trial findings in systematic reviews can be hindered by the heterogeneity of the outcomes reported. Moreover, the outcomes that matter most to patients might be underreported. A core outcome set can address these issues, as it defines a minimum set of outcomes that should be reported in all clinical trials in a...

Background The use of STOPP–START criteria during hospitalization reduced inappropriate medications in randomized controlled trials. Objective To evaluate whether the implementation of a screening tool (short version of STOPP–START criteria) in routine geriatric practice reduces potentially inappropriate medications (PIM) and potential prescribing...

Objective Our objectives were to (1) describe the evolution of the underuse of anticoagulants in older people with atrial fibrillation (AF) and a CHADS2 score ≥ 2 since direct oral anticoagulants (DOACs) were introduced to the market and (2) describe factors associated with this underuse. Methods We conducted a retrospective cross-sectional study i...

Objective: To define the types and numbers of inpatient clinical decision support alerts, measure the frequency with which they are overridden, and describe providers' reasons for overriding them and the appropriateness of those reasons. Materials and methods: We conducted a cross-sectional study of medication-related clinical decision support a...

Background Medication review has been advocated to address the challenge of polypharmacy in older patients, yet there is no consensus on how best to evaluate its efficacy. Heterogeneity of outcomes reported in clinical trials can hinder the comparison of clinical trial findings in systematic reviews. Moreover, the outcomes that matter most to older...

Objective: To analyze the patterns of potentially avoidable readmissions due to adverse drug events (ADEs) to identify the most appropriate risk reduction interventions. Methods: In this observational study, we analyzed a random sample of 534 potentially avoidable 30-day readmissions from 10,275 consecutive discharges from the medical department...

Anticholinergics are frequently prescribed for older adults and can lead to adverse drug events. The novel MARANTE (Muscarinic Acetylcholinergic Receptor ANTagonist Exposure) scale measures the anticholinergic exposure by incorporating potency and dosages of each medication into its calculations. The aims were to assess prevalence and intensity of...

Aim: Medication review has been advocated as one of the measures to tackle the challenge of polypharmacy in older patients, yet there is no consensus on how best to evaluate its efficacy. This study aimed to assess outcome reporting in trials of medication review in older patients. Methods: Randomized controlled trials (RCTs), prospective studie...

Aims: Little is known about the impact of Inappropriate Prescribing (IP) in community-dwelling adults, aged 80 and older. The prevalence at baseline (November 2008 - September 2009) and impact of IP (misuse, and underuse) after 18 months on mortality, and hospitalisation in a cohort of community-dwelling adults, aged 80 and older (n = 503) was stu...

Explicit criteria, such as the STOPP/START criteria, are increasingly used both in clinical practice and in research to identify potentially inappropriate prescribing in older people. In an article on the STOPP/START criteria version 2, O'Mahony et al. have pointed out the advantages of developing computerised criteria. Both clinical decision suppo...

Objectives: Polypharmacy is highly prevalent among older people (65+), but little is known on the medication use of the oldest old (80+). This study explores the medication use of the Belgian community-dwelling oldest old in relation to their demographic, clinical and functional characteristics. Methods: Baseline data was used from the BELFRAIL...

Background: The Beers and the STOPP/START lists have recently been updated to further improve appropriate prescribing in older patients. Objective: To compare Beers (2003, 2012) and STOPP/START version1 (v1) and v2 in terms of impact on the incidence of potentially inappropriate prescribing medication (including prescribing omission), polypharmacy,...

Background Experts suggest that formulary alerts at the time of medication order entry are the most effective form of clinical decision support to automate formulary management. Objective Our objectives were to quantify the frequency of inappropriate nonformulary medication (NFM) alert overrides in the inpatient setting and provide insight on how t...

Objectives To evaluate how often and why providers overrode drug allergy alerts in both the inpatient and outpatient settings. Design A cross-sectional observational study of drug allergy alerts generated over a 3-year period between 1 January 2009 and 31 December 2011. Setting A 793-bed tertiary care teaching affiliate of Harvard Medical School an...

Background: Ageing has become a worldwide reality and presents new challenges for the health-care system. Research has shown that potentially inappropriate prescribing, both potentially inappropriate medications and potentially prescribing omissions, is highly prevalent in older people, especially in the nursing home setting. The presence of poten...

Background: In October 2013, a New Medicines Service (NMS) was introduced in community pharmacies in Belgium to support asthma patients who are novice users of inhaler devices with corticosteroids. The protocol-based intervention used the Asthma Control Test (ACT) and the Medication Adherence Report Scale (MARS) to assess asthma control and medica...