Predictors of Adverse Drug Reaction-Related Hospitalisations Among People with Dementia: A Retrospective Case-Control Study.

INTRODUCTION: Adverse drug reactions (ADRs) are common among people with dementia; however, little is known about the magnitude and predictors associated with ADR-related hospitalisation among these individuals. This study aimed to determine the magnitude, types, drugs implicated and predictors of ADRs associated with hospitalisation among people with dementia. METHODS: This retrospective case-control study analysed medical records of individuals aged ≥ 65 years with dementia admitted to major public hospitals in Tasmania, Australia, from July 2010 to July 2021. Adverse drug reactions and implicated drugs were identified using administrative data and cross-checked with hospital medical records, with consensus reached among the research team. RESULTS: Of the 7928 people admitted to hospital at least once within the study period, 1876 (23.7%) experienced at least one ADR-related hospitalisation. Of these, 300 case patients with 311 ADRs and 300 control patients were randomly selected. The most common types of ADRs were renal (acute kidney injury; AKI) (36.0%), followed by neuropsychiatric (17.6%), cardiovascular (16.0%) and haematological (13.1%). Diuretics, renin-angiotensin system (RAS) inhibitors and anti-thrombotics constituted the main implicated drug classes. The ADR-related hospitalisation was associated with: chronic kidney disease (CKD) (OR 8.00, 95% CI 2.63-24.28, p < 0.001), Australian-born (OR 1.62, 95% CI 1.08-2.43, p = 0.019), hypertension (OR 1.48, 95% CI 1.01-2.17, p = 0.044) and the number of medicines (OR 1.06, 95% CI 1.00-1.12, p = 0.022). Potentially inappropriate medication use and anticholinergic burden did not predict ADR-related hospitalisation. CONCLUSIONS: These predictors could help identify the individuals at the highest risk and enable targeted interventions to be designed.

Adverse Drug Event-Related Hospital Admissions Among Australian Aged Care Residents: A Cross-Sectional Study.

OBJECTIVES: To investigate the proportion, characteristics, causality, severity, preventability, and independently associated factors for adverse drug event (ADE)-related admissions in aged care residents admitted to the major public hospitals in Tasmania, Australia. DESIGN: Retrospective cross-sectional study. SETTING AND PARTICIPANTS: Residential aged care facility (RACF) patients aged ≥65 years who had an unplanned admission to one of the 4 Tasmanian public hospitals between July 1, 2018, and June 30, 2021. METHODS: We accessed the medical records of RACF patients. The ADEs were initially identified via chart review and a trigger tool. Hospitalizations attributable to ADEs were then determined by expert consensus. The causality, preventability, and severity of each ADE admission were assessed using standard criteria. RESULTS: Ninety-one residents (18.2%) of 500 randomly selected experienced potential ADE-related hospitalizations. ADEs were considered possible (n = 58, 64%) or definite/probable (n = 33, 36%). The most common ADEs were falls (n = 19, 21%), hypotension (n = 16, 18%), and confusion or delirium (n = 10, 11%). ADEs were frequently associated with renin-angiotensin system inhibitors (n = 43, 47.3%), opioids (n = 43, 47.3%), and diuretics (n = 40, 44%). Most ADEs were of moderate severity (n = 90, 99%) and considered not preventable (n = 60, 66%). Rheumatologic disease [odds ratio (OR) 1.89, 95% CI 1.09-3.30; P = .024] and previous adverse drug reaction (ADR) (OR 12.91, 95% CI 6.84-24.37; P < .001) were associated with ADE hospitalizations. CONCLUSIONS AND IMPLICATIONS: This study highlights that hospitalization for moderately severe ADEs is common among RACF residents. Opioids and antihypertensives were the common drug classes associated with harm. Rheumatologic disease (due to opioids) and previous ADR were identified as independently associated factors, which may warrant tailored interventions.

Adverse clinical outcomes associated with drug-related hospitalizations in people with dementia.

BACKGROUND: This study aimed to determine the clinical impact associated with adverse drug reactions (ADRs) in patients with dementia. RESEARCH DESIGN AND METHODS: This case-control, propensity score-matched study utilized administrative data of people with dementia admitted to major public hospitals in Tasmania, Australia, from July 2010 to December 2019. RESULTS: Acute renal failure constituted the most common ADR. The length of hospital stay was greater for people with an ADR index admission, versus non-ADR index admission (median [IQR]: 9 [4-18] versus 6 [2-12]; p < 0.001). In-hospital mortality and combined in-hospital and post-hospital mortality within 30, 60 and 90 days were higher for those whose index admission was ADR-related (in-hospital: HR 1.40, 95% CI 1.11-1.77, p-value <0.001; 30 days: HR 1.25, 95% CI 1.05-1.49, p-value <0.001; 60 days: HR 1.27, 95% CI 1.08-1.49, p-value <0.001; 90 days: HR 1.29, 95% CI 1.10-1.50, p-value <0.001). Subsequent ADR admission within 30, 60 and 90 days of index discharge was 9 to 10 times greater for people with dementia (30 days: OR 10.0, 95% CI 6.04-16.8, p-value <0.001; 60 days: OR 8.96, 95% CI 5.57-14.4, p-value <0.001; 90 days: OR 9.31, 95% CI 5.79-14.9, p-value <0.001). CONCLUSION: Safe prescribing and vigilant monitoring of ADRs is pivotal to mitigate adverse outcomes in people with dementia.

Community Pharmacists' Role in Reducing the Incidence of Cardiometabolic Adverse Drug Events in Schizophrenia: Insights from Mental Health Professionals.

Background and Objectives: Schizophrenia, a debilitating mental illness, is often associated with significant physical health risks. Many second-generation antipsychotics increase the risk of metabolic syndrome and cardiovascular disease. Community pharmacists are highly accessible and could play a role in monitoring cardiometabolic adverse drug events in people with schizophrenia. However, it remains uncertain whether mental health professionals perceive this as valuable. This study aimed to explore the opinions of mental healthcare professionals regarding the role of community pharmacists in reducing the incidence of cardiometabolic adverse events in people with schizophrenia and their integration into a multidisciplinary mental health team. Materials and Methods: Qualitative semi-structured interviews were conducted with Australian psychiatrists, mental health nurses and mental health pharmacists. Transcription of the interviews underwent thematic analysis using an inductive approach. Results: Eleven mental healthcare professionals from metropolitan and regional areas across Australia were interviewed, leading to the identification of five overarching themes. These themes encompassed the following aspects: the benefits of community pharmacists' involvement in managing cardiometabolic adverse drug events in people with schizophrenia, improving communication pathways with community pharmacists, defining roles and responsibilities for monitoring cardiometabolic parameters and managing adverse cardiometabolic drug events, fostering collaboration between community pharmacists and mental health care professionals, and recognising the acceptance of community pharmacists' integration within a multidisciplinary team. Mental health professionals believed that community pharmacists could play a role in reducing the incidence of cardiometabolic adverse events in schizophrenia. However, they underscored the need for enhanced communication and collaboration pathways with other healthcare professionals, emphasised the importance of more comprehensive mental health first aid training, and identified potential barriers for community pharmacists such as remuneration, workload, and staff resources. Conclusions: Mental health professionals acknowledged the benefits of incorporating community pharmacists into multidisciplinary teams as a strategy to reduce the incidence of adverse events among individuals with schizophrenia. They recognise the competence of community pharmacists in monitoring cardiometabolic adverse events. However, these professionals have also highlighted specific perceived barriers to the complete integration of community pharmacists within these teams. Notably, there are concerns related to remuneration, staff resources, time constraints, acceptance by other healthcare professionals and patients, and the need for improved communication pathways. Addressing these barriers and providing targeted training could facilitate the valuable inclusion of community pharmacists in the comprehensive care of people with schizophrenia.

Exploring Australian pharmacists' views toward reducing the risk of medicines-related harm in aged care residents.

Medicines-related harm is common in older people living in residential aged care facilities (RACFs). Pharmacists offering services in the aged care sector may play a key role in reducing medicines-related injury. This study aimed to explore Australian pharmacists' views toward reducing the risk of medicines-related harm in older residents. Qualitative, semi-structured interviews were conducted with 15 Pharmacists across Australia providing services (e.g., through the provision of medication reviews, supplying medications, or being an embedded pharmacist) to RACFs identified via convenience sampling. Data were analyzed by thematic analysis using an inductive approach. Medicines-related harm was thought to occur due to polypharmacy, inappropriate medicines, anticholinergic activity, sedative load, and lack of reconciliation of medicines. Pharmacists reported that strong relationships, education of all stakeholders, and funding for pharmacists were facilitators in reducing medicines-related harm. Pharmacists stated that renal impairment, frailty, staff non-engagement, staff burnout, family pressure, and underfunding were barriers to reducing medicines-related harm. Additionally, the participants suggested pharmacist education, experience, and mentoring improve aged care interactions. Pharmacists believed that the irrational use of medicines increases harm in aged care residents, and medicines-specific (e.g., sedative load) and patient-specific risk factors (e.g., renal impairment) are associated with injuries in residents. To reduce medicines-related harm, the participants highlighted the need for increased funding for pharmacists, improving all stakeholders' awareness about medicines-associated harms through education, and ensuring collaboration between healthcare professionals caring for older residents.

Exploring Australian pharmacists' perceptions and practices towards reducing the risk of medicines-related harm in aged care residents.

Background: Older people living in residential aged care facilities frequently experience medicines-related harm. Evidence regarding the perception and practices towards reducing these harms may facilitate the development of customised educational programs for pharmacists providing services in RACFs. Objective: To explore Australian pharmacists' opinions and practices towards reducing the risk of medicines-related harm in aged care residents. Methods: An online survey was developed based on a literature review, expert opinion, and feedback from pharmacists providing services in RACFs. A web link for the survey was shared via professional pharmacy organisations and social media groups with Australian pharmacists providing services in RACFs. Results: A total of 209 pharmacists participated in the survey. Of these, 76% (n = 158) were residential medication management review embedded pharmacists, and 24% (n = 51) were supply pharmacists for RACFs. Most pharmacists believed that medicines-related harm is common in residents (n = 174, 83%), yet few agreed that pharmacists have enough time to participate in medicines-related harm reduction services (n = 60, 28%). There was a high level of agreement regarding the key risk factors (e.g., inappropriate medicines, anticholinergic drug use, and transitions of care) and potential strategies (e.g., embedded pharmacists in RACFs, educating aged care staff, and collaborative pharmacist-led medication reviews) for reducing medicines-related harm in residents. Conclusion: Pharmacists agreed that older residents often experience medicines-related harm, but they did not frequently participate in medicines-related harm reduction services. Initiatives to engage pharmacists in team-based harm reduction services and educate aged care staff regarding safe medication management may improve residents' safety and health outcomes.

Assessment of Knowledge, Attitude and Practices of the Hospital and Community Pharmacists in Saudi Arabia (Jeddah) towards Inappropriate Medication Use in Older Adults.

In Saudi Arabia, the older adult population is growing and is projected to increase three-fold by 2030. Potentially inappropriate medications (PIMs) are harmful to older adults' and have a direct impact on clinical, health and economic outcomes. Pharmacists have a vital role in medication tailoring for older adults as multidisciplinary team members. However, there is also a paucity of research regarding pharmacists' participation in detecting and avoiding PIMs use among older adults in Saudi Arabia. A cross-sectional, self-administered survey was conducted to assess the knowledge, practices, and attitude of pharmacists from seven hospitals and ten community pharmacies in Jeddah, Saudi Arabia. The survey comprised three sections; (i) identifying participants' general characteristics, (ii) assessing their knowledge of PIMs use in older adults and (iii) examining the pharmacist's attitude towards the procedures followed in dispensing for older adults. Inferential and descriptive statistics were used to analyse the survey data. A total of 157 community and hospital pharmacists participated in this study. Most of them dispensed medication weekly to older adults (85.4%), and 43.3% had relevant work experience of six to ten years. Though 44.6% of the participants were aware of PIMs that older adults should avoid, only 10.8% claimed adequate knowledge about PIMs. From the given three clinical case scenarios, a minority of pharmacists (21.7%) chose the correct answers, with a mean score of 2.38 ± 2.91 (95% CI 2.35-3.15). Participants who claimed to have knowledge of PIMs had a significantly higher mean score than those who did not, 4.59 ± 2.81 25 (95% CI 2.35-2.61). A minority of the pharmacists (14.7%) used screening tools such as STOPP, Beers criteria, or Medication Appropriateness Index (MAI) to detect PIMs in older adults. No statistically significant differences were detected when comparing the levels of knowledge of pharmacists with 1 to 5 years of practice to pharmacists with 6 to 15 and more years of experience (p = 0.431). Pharmacists' knowledge, attitude and practices toward PIMs use in older adults in Saudi Arabia should be improved. The application of PIMs detection tools such as STOPP/START or Beers criteria currently has no place in day-to-day pharmacists' roles in Saudi Arabia. Therefore, concerned stakeholders should develop educational programs to improve pharmacists' knowledge of PIMs and promote the effective use of PIM screening tools such as Beers and STOPP criteria in their practice.

Improving the accuracy of discharge medication documentation in people with kidney disease through pharmacist-led partnered prescribing.

BACKGROUND: Inaccurate medication documentation in prescriptions and discharge summaries produce poorer patient outcomes, are costly to healthcare systems and result in more readmissions to hospital. Errors in medication documentation are common in Australian hospitals. AIM: To determine whether pharmacist-led partnered prescribing (PPP) on discharge reduced errors and improved accuracy in documentation of medications in the discharge prescription and the discharge summary of people with kidney disease compared with medical prescribing (MP). METHODS: This interventional two-phase study compared current workflow (MP) with the subsequent implementation of the interventional workflow (PPP) in the renal unit of a tertiary referral hospital. Patients were included if they were discharged within pharmacy working hours and had a discharge prescription and discharge summary. The primary outcome was the percentage of discharge prescriptions with at least one error. The secondary outcome was the percentage of discharge summaries with at least one error. RESULTS: Data were collected from 185 discharged patients (95 in MP phase then 90 in PPP phase). Discharge prescriptions with at least one error reduced from 75.8% in the MP phase to 6.7% in PPP phase (P < 0.001). Discharge summaries with at least one error reduced from 53% in MP phase to 24% in the PPP phase (P < 0.001). CONCLUSION: PPP improves the accuracy of the documentation of medications in both the discharge prescription and the discharge summary of patients with kidney disease.

Actual drug-related harms in residential aged care facilities: a narrative review.

INTRODUCTION: Older people in residential aged care facilities (RACFs) have a high risk of safety issues and concerns about the potential quality of care received. This narrative review investigates the types of actual drug-related harms, their prevalence, reporting of any standard definitions for these harms, and their identification methods. AREAS COVERED: The authors conducted a systematic search on Ovid Embase, Ovid Medline, and PubMed from March 2001 to March 2021. This narrative review included all types of studies targeting aged care residents aged 65 years and above with actual drug-related harms. EXPERT OPINION: The prevalence of actual drug-related harms in residents ranged from 0.07% to 63.0%. Falls, drug-drug interactions, neuropsychiatric symptoms, anaphylaxis, urinary tract infection, hypoglycemia, hypokalaemia, and acute kidney injury are the most common drug-related harms in older residents. Psychotropic drugs are the most common drug class implicated in these harms. Evidence related to the association between individual psychotropic drugs and injury, or harm is also lacking. Due to the variation in study duration, reported prevalence, identification methods, and absence of a definition for actual drug-related harms in most studies, further research is mandated to understand the prevalence and clinical implications of drug-related harms in older residents.

Ten-year trends in adverse drug reaction-related hospitalizations among people with dementia.

Aim: Trends in the incidence of adverse drug reaction (ADR)-related hospitalizations have been studied in the general population, but not specifically in people with dementia. This study aimed to investigate trends in the incidence of ADR-related hospitalizations among people with dementia, and identify the most commonly implicated drugs and diagnoses in these admissions. Methods: This study utilized the administrative data of all adults admitted to the four major public hospitals of Tasmania, Australia, with a primary or secondary diagnosis of dementia from July 2010 to December 2019. ADR-related hospitalizations were identified by using diagnosis-based and external cause codes. The Cochran-Armitage test was used to examine trends in the incidence of ADR-related hospitalizations. Results: Of the 7552 people with dementia admitted to the hospital at least once within the study period, 1775 (23.5%) experienced at least one ADR-related hospitalization. The estimated annual incidence of ADR-related hospitalizations increased 18% (1484-1760 per 100,000 population with dementia, p for trend <0.05) from 2010 to 2019. For those ADR-related admissions with a drug code recorded, 19.3% were due to antithrombotics and 11.5% to antihypertensives. The most frequent ADR-related admission diagnoses were renal diseases (72.9%). Length of hospital stay and in-hospital mortality were both significantly greater for ADR-related, relative to non-ADR-related, admissions (median 7 versus 5 days and 11% versus 6.7%, respectively; p < 0.001). Conclusion: The annual incidence of ADR-related hospitalizations in people with dementia increased between 2010 and 2019. Antithrombotics were the most commonly implicated drug class. The ADR-related hospitalizations were associated with increased length of stay and greater mortality. Plain Language Summary: Adverse drug reaction-related hospitalizations among people with dementia. Introduction: This study aimed to investigate trends in hospitalizations associated with medication problems among people with dementia, and identify the most commonly implicated drugs and diagnoses in these admissions. Methods: This study utilized the administrative data of all adults admitted to the four major public hospitals of Tasmania, Australia, with dementia from July 2010 to December 2019. Results: The annual incidence of hospitalizations associated with medication problems among people with dementia increased nearly 20% over 10 years. The length of hospital stay and in-hospital mortality were significantly greater for hospitalizations related to medication problems. Conclusion: The incidence of hospitalizations associated with medication problems in people with dementia increased between 2010 and 2019.

Pharmacist-led interventions to reduce adverse drug events in older people living in residential aged care facilities: A systematic review.

AIMS: We aimed to investigate the efficacy and effectiveness of pharmacist-led interventions to reduce adverse drug events (ADEs) in older people living in residential aged care facilities (RACFs). METHODS: We systematically searched MEDLINE via PubMed, Embase, Cochrane Central Register of Controlled Trials and PsycINFO from their inceptions to July 2020. We investigated experimental study designs that employed a control group, or quasi-experimental studies conducted in RACFs. RESULTS: We screened 3826 records and included 23 studies. We found seven single-component and 16 multicomponent pharmacist-led interventions to reduce ADEs in older people living in RACFs. The most frequent single-component pharmacist-led intervention was medication review. Medication review and education provision to healthcare professionals were the most common components in many pharmacist-led multicomponent interventions. Thirteen studies (56%) showed no effect, whereas ten studies (43%) reported significant reductions in ADEs following pharmacist-led interventions either as a sole intervention or as a part of a multi-component intervention. Many interventions focused on reducing the incidence of falls (39%). CONCLUSIONS: This systematic review suggests that pharmacist-led interventions have the potential to reduce the incidence of ADEs in older people living in RACFs. Medication review and educational programmes, particularly academic detailing, either as a single component or as part of multicomponent interventions were the most common approaches to reducing drug-related harm in older people living in RACFs. The lack of a positive association between interventions and ADE in many studies suggests that targeted and tailored pharmacist-led interventions are required to reduce ADEs in older people in RACFs.

Assessing adherence to infusion-based biologic therapies in patients with inflammatory bowel disease.

BACKGROUND: The intravenous biologics infliximab and vedolizumab are effective long-term therapies for inflammatory bowel disease (IBD). Though highly effective, suboptimal adherence may result in loss of response and adverse sequelae. The extent and outcomes of suboptimal adherence with intravenous biologics, including in IBD, requires further evaluation. OBJECTIVES: To ascertain adherence to infliximab and vedolizumab infusions, and determine factors associated with poorer adherence within an IBD cohort. METHODS: A retrospective single-centre cohort study of IBD patients, assessing adherence to infliximab and vedolizumab over 2 years (July 1, 2017 to June 30, 2019) was conducted. Medical and pharmacy dispensing records were used to determine date of infusion. Adherence was assessed using the continuous, multiple interval measure of medication gaps (CMG). Objectively measured disease remission was achieved if one or more of endoscopic remission, faecal calprotectin <100 µg/mL and/or CRP <5 mg/mL occurred within 3 months of end of follow-up. Bivariate analysis and multiple linear regression elucidated factors associated with poorer adherence. RESULTS: Of 193 IBD patients, 132 (68.4%) had Crohn's disease. One hundred and thirty six (70.5%) patients received infliximab and 57 (29.5%) received vedolizumab with a median 13 [IQR 11-14] doses administered per patient over 2 years. Adherence according to CMG was similar between infliximab and vedolizumab groups (median 1.5% vs 1.2%, p = 0.31). In multiple linear regression analysis male sex, shorter IBD duration and clinic non-attendances were each associated with poorer adherence (Beta 4.69, 3.90, 3.56 respectively, p < 0.05) and objective disease remission was inversely associated with poorer adherence (Beta -3.27, p < 0.05). CONCLUSION: There was a wide range of adherence to biologic infusions in this IBD cohort with poorer adherence associated with patient related factors. Conversely, objectively measured remission was strongly associated with adherence. This emphasises the need for targeted interventions to improve adherence and monitoring, and mitigate treatment delays.

Outcomes of Medication Misadventure Among People With Cognitive Impairment or Dementia: A Systematic Review and Meta-analysis.

OBJECTIVE: To investigate mortality and hospitalization outcomes associated with medication misadventure (including medication errors [MEs], such as the use of potentially inappropriate medications [PIMs], and adverse drug events [ADEs]) among people with cognitive impairment or dementia. DATA SOURCES: Ovid MEDLINE, Ovid EMBASE, Ovid International Pharmaceutical Abstracts, Cumulative Index to Nursing and Allied Health Literature, and Cochrane Central Register of Controlled Trials were searched from inception to December 2019. STUDY SELECTION AND DATA EXTRACTION: Relevant studies using any study design were included. Reviewers independently performed critical appraisal and extracted relevant data. DATA SYNTHESIS: The systematic review included 10 studies that reported the outcomes of mortality or hospitalization associated with medication misadventure, including PIMs (n=5), ADEs (n=2), a combination of MEs and ADEs (n=2), and drug interactions (n=1). Five studies examining the association between PIMs and mortality/hospitalization were included in the meta-analyses. Exposure to PIMs was not associated with either mortality (odds ratio [OR]=1.36; 95%CI=0.79-2.35) or hospitalization (OR=1.02; 95%CI=0.83-1.26). In contrast, single studies indicated that ADEs with cholinesterase inhibitors were associated with mortality and hospitalization. RELEVANCE TO PATIENT CARE AND CLINICAL PRACTICE: Individuals with cognitive impairment or dementia are at increased risk of medication misadventure; based on relatively limited published data, this does not necessarily translate to increased mortality and hospitalization. CONCLUSIONS: Overall, medication misadventure was not associated with mortality or hospitalization in people with cognitive impairment or dementia, noting the limited number of studies, difficulty in controlling potential confounding variables, and that most studies focus on PIMs.

Medication Regimen Complexity Index Prediction of Adverse Drug Reaction-Related Hospital Admissions.

BACKGROUND: The relationship between the medication regimen complexity index (MRCI) and adverse drug reaction (ADR)-related hospital admissions has not yet specifically been investigated. OBJECTIVE: To evaluate the MRCI and compare with medication count for prediction of ADR-related hospital admissions in older patients. METHODS: This was a retrospective analysis of a prospectively collected convenience sample of 768 unplanned medical admissions of Australians aged 65 years old and older. The sample consisted of 115 (15.0%) ADR-related unplanned hospital admissions and 653 (85.0%) non-ADR-related unplanned medical admissions. The MRCI score was calculated from the medical records and analyzed to predict ADR-related hospital admissions. RESULTS: The cohort had a median age of 81 years, 5 comorbidities, and 11 medications, with a slight majority of women. The MRCI score was not significantly different in patients who had ADR-related admissions compared with other medical admissions-38.5 versus 34.0, respectively; Wilcoxon Rank Sum test W = 33 522; P = 0.067. The medication count was significantly different between the ADR-related admissions compared with other medical admissions: 12 versus 10; W = 32 508; P = 0.021. However, the medication count was not a strong predictor of ADR-related admissions; unadjusted odds ratio = 1.044; 95% CI = 1.006-1.084. CONCLUSION AND RELEVANCE: The MRCI score did not discriminate between ADR-related admissions and other medical admissions despite taking time to calculate with potential for inconsistent application. Medication count is more readily applicable with marginally greater relevance in this cohort; however, both measures do not appear to be useful when used alone for clinicians to identify patients at risk of ADRs.

Prospective identification versus administrative coding of adverse drug reaction-related hospitalizations in the elderly: A comparative analysis.

PURPOSE: To compare prospective identification of adverse drug reaction (ADR)-related hospital admissions in the elderly with administrative coding using the International Classification of Diseases 10th Revision Australian Modification (ICD-10-AM) coding system. METHODS: We linked the records of 768 enrolled patients from an earlier study, where clinical pharmacists identified ADRs using prospective data collection, to hospital administrative data. We identified patients in the study whose admissions were coded as ADRs using ICD-10-AM codes. We then compared the prevalence and characteristics of ADR-related hospital admissions identified by the two approaches. RESULTS: According to ICD-10-AM coding, 2.7% of patients were admitted due to ADRs, while 15.0% of patients were deemed to have been admitted due to ADRs based on prospective identification by clinical pharmacists. Most (85.7%) patients coded as having an ADR-related hospital admission were also identified as such prospectively. Hematological (23.1%) and metabolic reactions (23.1%) were frequent causes of ADRs identified by coding, whereas cardiovascular ADRs (27.8%) were more common causes of ADRs identified prospectively by pharmacists. Antidepressants (16.7%) and cardiac glycosides (16.7%) were the most commonly implicated drug groups in ADRs identified by coding, whereas diuretics (28.8%) and renin-angiotensin system inhibitors (17.0%) were frequently implicated as causes of ADRs identified prospectively by pharmacists. CONCLUSIONS: Reliance on administrative coding potentially underestimates the extent of the problem of ADRs as a cause of hospitalization in the elderly, and more detailed prospective analysis of admissions provides additional targets for strategies to prevent ADRs. The types of ADRs identified also differ between the two approaches.

Repeat Adverse Drug Reaction-Related Hospital Admissions in Elderly Australians: A Retrospective Study at the Royal Hobart Hospital.

BACKGROUND: Adverse drug reactions are a major cause of hospital admissions in older individuals, with the majority potentially preventable. Despite the apparent magnitude of this problem, little is known about rates of repeat admission to hospital as a result of adverse drug reactions. OBJECTIVES: The objectives of this study were to investigate the occurrence of repeat adverse drug reaction-related hospital admissions in elderly patients within 12 months of an adverse drug reaction-related admission to a medical ward and whether a validated adverse drug reaction score could be useful in identifying patients at higher risk of a repeat adverse drug reaction-related hospitalisation. METHODS: This retrospective study followed elderly participants who were hospitalised with an adverse drug reaction from our earlier study [the PADR-EC (Prediction of Hospitalization due to Adverse Drug Reactions in Elderly Community-Dwelling Patients) study] to identify repeat adverse drug reaction-related hospital admissions within 12 months of discharge. The PADR-EC score is the sum of points assigned to five significant predictors of adverse drug reaction-related hospitalisation: antihypertensive use, renal failure, dementia, inappropriate anticholinergic use and drug changes in the preceding 3 months. The causality, preventability and severity of each adverse drug reaction-related repeat admission within the 12-month follow-up were assessed. RESULTS: Adverse drug reaction-related repeat admissions occurred after 13.4% (n = 15) of 112 adverse drug reaction-related index admissions. Patients with a repeat adverse drug reaction-related admission had significantly higher PADR-EC scores at discharge of their index admission (median PADR-EC score 7, interquartile range 7-9) than patients who were not readmitted (median PADR-EC score 7, interquartile range 5-7, p = 0.034). Most (73.3%) adverse drug reaction-related repeat admissions were considered 'preventable'. Adverse drug reaction severity was 'moderate' in all cases. Renal disorders (44.4%) represented the most common adverse drug reactions and the most frequently implicated drug classes were diuretics (44.8%). All adverse drug reaction-related repeat admissions were found to be 'probable'. CONCLUSIONS: One in eight elderly patients hospitalised because of an adverse drug reaction had a repeat admission for an adverse drug reaction within 12 months of discharge. The PADR-EC score could potentially be used at hospital discharge to prioritise patients for interventions to prevent subsequent adverse drug reaction-related hospital admissions.

Vitamin D Supplementation in Tasmanian Nursing Home Residents.

BACKGROUND: It is currently recommended in Australia that nursing home residents are supplemented daily with 1000 IU vitamin D as they are at an increased risk of fractures. Historically, supplementation has been low, and current supplementation prevalence is not known. OBJECTIVE: The aim of this study was to determine the prevalence of vitamin D supplementation amongst nursing home residents in Tasmania, Australia. METHODS: Resident data, including demographics, medical conditions and medications (including vitamin D and calcium supplement use), exercise and sun exposure, were obtained from residents' files and staff in consenting nursing homes. Dietary calcium intake was estimated from the weekly menu of one nursing home and total calcium intake estimated from this and calcium supplement use. The prevalence of vitamin D supplementation was compared by resident characteristics and fracture risk factors. RESULTS: Of 811 residents, 409 (50 %) received daily vitamin D supplementation of at least 1000 IU. Residents receiving vitamin D supplementation were slightly younger (mean 83 vs. 85 years for supplemented and unsupplemented groups, respectively, p = 0.003) and more likely to have osteoporosis (29 vs. 22 % for supplemented and unsupplemented groups, respectively, p = 0.019). Only 43 % of residents with osteoporosis received vitamin D supplements. Most residents (86 %) did not have regular sunlight exposure. The median estimated total calcium intake of 800 ± 275 mg daily was below guideline recommendations of 1000-1300 mg daily. CONCLUSIONS: The prevalence of vitamin D supplementation in nursing home residents was relatively low, suggesting poor adherence to the relevant clinical guidelines. Additionally, most residents do not access sunlight. Interventions addressing this evidence-practice gap are needed.

Adverse-Drug-Reaction-Related Hospitalisations in Developed and Developing Countries: A Review of Prevalence and Contributing Factors.

Adverse drug reactions (ADRs) are one of the leading causes of hospital admissions and morbidity in developed countries and represent a substantial burden on healthcare delivery systems. However, there is little data available from low- and middle-income countries. This review compares the prevalence and characteristics of ADR-related hospitalisations in adults in developed and developing countries, including the mortality, severity and preventability associated with these events, commonly implicated drugs and contributing factors. A literature search was conducted via PubMed, Scopus, Web of Science, Embase, ProQuest and Google Scholar to find articles published in English from 2000 to 2015. Relevant observational studies were included. The median (with interquartile range [IQR]) prevalence of ADR-related hospitalisation in developed and developing countries was 6.3 % (3.3-11.0) and 5.5 % (1.1-16.9), respectively. The median proportions of preventable ADRs in developed and developing countries were 71.7 % (62.3-80.0) and 59.6 % (51.5-79.6), respectively. Similarly, the median proportions of ADRs resulting in mortality in developed and developing countries were 1.7 % (0.7-4.8) and 1.8 % (0.8-8.0), respectively. Commonly implicated drugs in both settings were antithrombotic, non-steroidal anti-inflammatory and cardiovascular drugs. Older age, female gender, number of medications, renal impairment and heart failure were reported to be associated with an increased risk for ADR-related hospitalisation in both settings while HIV/AIDS was implicated in developing countries only. The majority of ADRs were preventable in both settings, highlighting the importance of improving medication use, particularly in vulnerable patient groups such as the elderly, patients with multiple comorbidities and, in developing countries, patients with HIV/AIDS.

Impact of residential medication management reviews on anticholinergic burden in aged care residents.

OBJECTIVES: The primary objective of this study was to investigate the impact of Residential Medication Management Reviews (RMMRs) on anticholinergic burden quantified by seven anticholinergic risk scales. DESIGN: Retrospective analysis. SETTING: Accredited pharmacists conducted RMMRs in aged-care facilities (ACFs) in Sydney, Australia. PARTICIPANTS: RMMRs pertained to 814 residents aged 65 years or older. MEASUREMENTS: Anticholinergic burden was quantified using seven scales at baseline, after pharmacists' recommendations and after the actual GP uptake of pharmacists' recommendations. Change in the anticholinergic burden was measured using the Wilcoxon sign rank test. RESULTS: At baseline, depending on the scale used to estimate the anticholinergic burden, between 36% and 67% of patients were prescribed at least one regular anticholinergic medication (ACM). Anticholinergic burden scores were significantly (p < 0.001) lower after pharmacists' recommendations as determined by each of the seven scales. The reduction in anticholinergic burden was also significant (p < 0.001) after GPs' acceptance of the pharmacists' recommendations according to all scales with the exception of one scale which reached borderline significance (p = 0.052). CONCLUSION: Despite the limitations of the retrospective design and differences in the estimation of anticholinergic burden, this is the first study to demonstrate that RMMRs are effective in reducing ACM prescribing in ACF residents, using a range of measures of anticholinergic burden. Future studies should focus on whether a decrease in anticholinergic burden will translate into improvement in clinical outcomes.

Impact of the pharmacist medication review services on drug-related problems and potentially inappropriate prescribing of renally cleared medications in residents of aged care facilities.

BACKGROUND: Drug-related problems (DRPs) are common in aged care facilities and few studies have been conducted to determine the impact of the pharmacist-conducted medication review services. Studies determining the prevalence of chronic kidney disease (CKD) and data regarding inappropriate prescribing of renally cleared medications in aged care facilities in Australia are also lacking. OBJECTIVES: To investigate the number and nature of DRPs identified and recommendations made by pharmacists in residents of aged care facilities. To determine the prevalence of CKD and estimate the magnitude of inappropriate prescribing of renally cleared medications in residents of aged care facilities. METHODS: DRPs identified and recommendations made by pharmacists were classified using the adapted version of the DOCUMENT classification system. The modification of diet in renal disease formula was used to estimate the prevalence of CKD, and the Cockcroft-Gault formula was used to estimate the magnitude of inappropriate prescribing of renally cleared medications. RESULTS: Over 98 % of residents of aged care facilities had at least one DRP. Most (83.8 %) recommendations made by accredited pharmacists to resolve DRPs were accepted by general practitioners. CKD was prevalent in 48 % of residents, and inappropriate prescribing of renally cleared medications was identified in 28 (16 %) residents with CKD. CONCLUSIONS: DRPs are common in aged care facilities and the impact of medication review services appears to be high. CKD is also common among residents of aged care facilities, and inappropriate prescribing of renally cleared medications was also prevalent, warranting attention to regular renal function monitoring and appropriate drug and dose selection in residents of aged care facilities.