Publications by authors named "Caitriona Cahir"

Article Synopsis
  • Adverse drug reactions (ADRs) are prevalent, particularly in older adults, leading to serious health issues and high healthcare costs, prompting a need for better prediction models.* -
  • A systematic review included eight studies on ADR-risk prediction tools for older adults, finding mixed results in their reliability and poor adherence to established reporting guidelines (TRIPOD).* -
  • The findings indicate a need for improved prediction models that are both validated and practical for real-world application to better assess their effectiveness and usability.*
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Article Synopsis
  • Ovarian function suppression (OFS) using gonadotropin-releasing hormone agonists (GnRHas) is a common treatment for premenopausal patients with high-risk hormone receptor-positive breast cancer, but there is limited guidance on its optimal use.
  • A survey sent to oncologists revealed that most used goserelin and leuprolide as GnRHas, with varied practices around initiation and duration of therapy, and inconsistent monitoring of estradiol levels.
  • The results showed significant variation in treatment approaches among oncologists, and a strong desire (92%) for more practical guidance from ASCO on OFS management.
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Background: Assessment of comprehensive consultations in medicine, i.e. a complete history, physical examination, and differential diagnosis, is regarded as authentic tests of clinical competence; however, they have been shown to have low reliability and validity due to variability in the real patients used and subjective examiner grading.

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  Secondary use of health data provides opportunities to drive improvements in healthcare provision, personalised medicine, comparative effectiveness research, health services innovation, and policy and practice. However, secondary data use requires compliance with relevant legislation, implementation of technical safeguards, ethical data management, and respect for data sharers. Existing evidence suggests widespread support for secondary use of health data among the public, which co-exists with concerns about privacy, confidentiality and misuse of data.

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Introduction: Early discontinuation of endocrine therapy (ET) is higher among patients with early breast cancer (EBC) compared to patients with metastatic hormone receptor-positive (HR+) breast cancer (MBC). In our clinical experience the reasons for this may include a significant burden of ET side effects impacting quality of life (QOL) in patients with EBC. We hypothesized that QOL is lower in patients with HR + EBC compared to patients with HR + MBC on ET.

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Background: Evidence on associations between drug-drug interactions (DDIs) and health outcomes in the older community-dwelling population is limited.

Objective: We estimate potentially clinically important DDI prevalence and examine the association between DDIs and (1) adverse drug events (ADEs), (2) emergency hospital attendance and (3) health-related quality of life (HRQoL) in an older community-dwelling population in Ireland.

Methods: This is a prospective cohort study of community-dwelling older adults (N = 904) aged ≥ 70 years from 15 general practices in Ireland recruited in 2010 (wave-1) and followed-up over 2 years (wave-2; 2012-2013), with linked national pharmacy claims data.

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Background: There is an increasing need to increase simulation-based learning opportunities for vascular surgery residents in endovascular skills training. This study aims to explore the effectiveness of remote expert instructional feedback of endovascular simulation-based education, as a means of increasing training opportunities in this area for vascular surgery residents.

Methods: A mixed-methods study design was adopted.

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Background: Since the onset of the pandemic, breast cancer (BC) services have been disrupted in most countries. The purpose of this qualitative study is to explore the unmet needs, patient-priorities, and recommendations for improving BC healthcare post-pandemic for women with BC and to understand how they may vary based on social determinants of health (SDH), in particular socio-economic status (SES).

Methods: Thirty-seven women, who were purposively sampled based on SDH and previously interviewed about the impact of COVID-19 on BC, were invited to take part in follow-up semi-structured qualitative interviews in early 2023.

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Background: Sacubitril/valsartan (SV) is currently recommended as a first-line therapy in patients with heart failure and reduced ejection fraction (HFrEF) due to its significant clinical and prognostic benefit; however, not all patients respond to therapy and predictors of clinical response to SV remain under-studied.

Aims: To identify electrocardiographic (ECG) predictors of response to SV therapy in HFrEF patients.

Methods: A retrospective analysis of a hospital heart failure registry was undertaken.

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Background: It is essential to evaluate the functionality of surgical simulation models, in order to determine whether they perform as intended. In this study, we assessed the use of a simulated laparotomy incision and closure-training model by collating validity evidence to determine its utility as well as pre and post-test interval data.

Method: This was a quantitative study design, informed by Messick's unified validity framework.

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Background: Older adults in Ireland are at increased risk of adverse drug events (ADE) due, in part, to increasing rates of polypharmacy. Interventions to reduce ADE in community dwelling older adults (CDOA) have had limited success, therefore, new approaches are required.A realist review uses a different lens to examine why and how interventions were supposed to work rather than if, they worked.

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Background: This study aimed to determine the prevalence of potentially inappropriate prescribing (PIP) and potential prescribing omissions (PPOs) and their association with ADR-related hospital admissions in patients aged ≥ 65 years admitted acutely to the hospital.

Methods: Information on medications and morbidities was extracted from the Adverse Drug Reactions in an Ageing Population (ADAPT) cohort (N = 798: N = 361 ADR-related admissions; 437 non-ADR-related admissions). PIP and PPOs were assessed using Beers Criteria 2019 and STOPP/START version 2.

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Article Synopsis
  • In oestrogen-receptor positive breast cancer, daily oral adjuvant endocrine therapy (ET) is crucial for reducing recurrence and mortality risks, but many women struggle with adherence to this treatment.
  • An umbrella review identified 17 systematic reviews on factors affecting ET adherence, categorizing them based on the World Health Organization's adherence dimensions.
  • Key influences on non-adherence included patient-related factors (like treatment perceptions), healthcare provider interactions, and socio-economic support, with modifiable factors proving more impactful than fixed characteristics.
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Aims: The aims of this study were to estimate potentially clinically important drug-drug interaction (DDI) prevalence, and the average causal effect of DDI exposure on adverse drug reaction (ADR)-related hospital admission, and to examine differences in health-related quality of life (HRQoL) and length of stay (LOS) per DDI exposure in an older (≥65 years) population acutely hospitalized.

Methods: This was a cross-sectional study conducted among 798 older individuals acutely admitted to hospital in Ireland between 2016 and 2017. Medication (current/recently discontinued/over-the-counter) and clinical data (e.

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Background: The aim of this study is to explore the general impact of COVID-19 on the access and use of BC services and support and overall well-being in women living with a diagnosis of breast cancer (BC) and to investigate how these experiences varied by the social determinants of health (SDH).

Methods: Semi-structured qualitative interviews were conducted with women selected through stratified purposive sampling to ensure data were available on information-rich cases. Interviews were conducted in early 2021 during government restrictions due to COVID-19.

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Purpose: This study examines healthcare costs associated with adverse drug reactions (ADR) in an older population admitted acutely to an Irish tertiary hospital.

Methods: Prospective cohort study involving older persons admitted to hospital with and without an ADR. Data was collected at baseline, during hospitalisation and post-discharge.

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Since the onset of the coronavirus disease 2019 (COVID-19) pandemic, health services for breast cancer (BC) have been disrupted. Our scoping review examines the impact of the COVID-19 pandemic on BC services, health outcomes, and well-being for women. Additionally, this review identifies social inequalities specific to BC during the pandemic.

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Background: The aims of this study were to explore the impact of COVID-19 on health-care services and quality of life (QoL) in women diagnosed with breast cancer (BC) in Ireland and whether the impact varied by social determinants of health (SDH).

Methods: Women diagnosed with BC completed a questionnaire measuring the impact of COVID-19, disruption to BC services, QoL, SDH, and clinical covariates during COVID-19 restrictions. The association between COVID-19 impact and disruption to BC services and QoL was assessed using multivariable regression with adjustment for SDH and clinical covariates.

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Purpose: To inform intervention development, we measured the modifiable determinants of endocrine therapy (ET) non-adherence in women with breast cancer, using the Theoretical Domains Framework (TDF) and examined inter-relationships between these determinants and non-adherence using the Perceptions and Practicalities Approach (PAPA).

Methods: Women with stages I-III breast cancer prescribed ET were identified from the National Cancer Registry Ireland (N = 2423) and invited to complete a questionnaire. A theoretically based model of non-adherence was developed using PAPA to examine inter-relationships between the 14 TDF domains of behaviour change and self-reported non-adherence.

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Older people experience greater morbidity with a corresponding increase in medication use resulting in a potentially higher risk of adverse drug reactions (ADRs). The aim of this study was to; 1) determine the prevalence and characteristics of ADR-related hospital admissions among older patients (≥65 years) in Ireland; and 2) identify the risk factors associated with ADR-related hospital admissions. A cross-sectional study of ADR prevalence in patients aged ≥65 years admitted acutely to hospital in Ireland over a 8 month period (November 2016- June 2017).

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Background: Drug-drug interactions (DDIs) can lead to medication-related harm, and the older population is at greatest risk. We conducted a systematic review and meta-analysis to estimate DDI prevalence and identify common DDIs in older community-dwelling adults.

Methods: PubMed and EMBASE were searched for observational studies published between 01/01/2010 and 10/05/2021 reporting DDI prevalence in community-dwelling individuals aged ≥ 65 years.

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Article Synopsis
  • - Older adults (≥70 years) face a heightened risk of severe drug-drug interactions (DDIs), especially with cardiovascular and CNS medications, due to polypharmacy.
  • - A study assessing 1,466 older community-dwellers found that 22.65% were potentially exposed to at least one severe DDI, with prolonged exposure occurring in over half of those affected.
  • - Key factors linked to increased DDI risk included taking 10 or more medications and having depression, highlighting the need for careful medication management in this population.
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Medication adherence is a priority for health systems worldwide and is widely recognised as a key component of quality of care for disease management. Adherence-related indicators were rarely explicitly included in national health policy agendas. One barrier is the lack of standardised adherence terminology and of routine measures of adherence in clinical practice.

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Background: Breast cancer care today involves state-of-the-art biomedical treatment but can fail to address the broader psychosocial and quality-of-life (QoL) issues associated with the transition to breast cancer survivorship. This scoping review examines the evidence on the influence of psychosocial determinants on QoL in breast cancer survivors.

Methods: Scoping review methodology was used to: (1) identify the research question(s); (2) identify relevant studies; (3) undertake study selection; (4) extract data; (5) collate, summarise and report the results.

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Objectives: To classify older people with multimorbidity according to their adherence patterns and to examine the association between medication adherence and health outcomes.

Methods: This is a secondary analysis of a cohort study. Community-dwelling adults aged ≥70 years were recruited from 15 general practices in Ireland in 2010 (wave 1) and followed up 2 years later (wave 2).

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