Cristín Ryan

Prof. Dr. Cristín Ryan

School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 February 2022 in The Pharmacogenomics Journal
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Journal Article
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JOJoseph O’sHea
Joseph O’sHea
MLMark Ledwidge
Mark Ledwidge
JGJoseph Gallagher
Joseph Gallagher
CKCatherine Keenan
Catherine Keenan
Cristín RyanCristín Ryan
Cristín Ryan
Conventional medicines optimisation interventions in people with multimorbidity and polypharmacy are complex and yet limited; a more holistic and integrated approach to healthcare delivery is required. Pharmacogenetics has potential as a component of medicines optimisation. Studies involving multi-medicine pharmacogenetics in adults with multimorbidity or polypharmacy, reporting on outcomes derived from relevant core outcome sets, were included in this systematic review. Narrative synthesis was undertaken to summarise the data; meta-analysis was inappropriate due to study heterogeneity. Fifteen studies of diverse design and variable quality were included. A small, randomised study involving pharmacist-led medicines optimisation, including pharmacogenetics, suggests this approach could have significant benefits for patients and health systems. However, due to study design heterogeneity and the quality of the included studies, it is difficult to draw generalisable conclusions. Further pragmatic, robust pharmacogenetics studies in diverse, real-world patient populations, are required to establish the benefit of multi-medicine pharmacogenetic screening on patient outcomes.

24 November 2017 in Drugs & Aging
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Journal Article
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MMMairead McGrattan
Mairead McGrattan
Cristín RyanCristín Ryan
Cristín Ryan
HBHeather Elizabeth Barry
Heather Elizabeth Barry
CHCarmel M Hughes
Carmel M Hughes


13 May 2020 in BMC Health Services Research
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Journal Article
Open access
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DPD. E. Patton
D. E. Patton
Cristín RyanCristín Ryan
Cristín Ryan
CHCarmel M Hughes
Carmel M Hughes
Background: To improve the effectiveness of interventions targeting non-adherence in older adults, a systematic approach to intervention design is required. The content of complex interventions and design decisions are often poorly described in published reports which makes it difficult to explore why they are ineffective. This intervention development study reports on the design of a community pharmacy-based adherence intervention using 11 Behaviour Change Techniques (BCTs) which were identified from previous qualitative research with older patients using the Theoretical Domains Framework. Methods: Using a group consensus approach, a five-step design process was employed. This focused on decisions regarding: (1) the overall delivery format, (2) formats for delivering each BCT; (3) methods for tailoring BCTs to individual patients; (4) intervention structure; and (5) materials to support intervention delivery. The APEASE (Affordability; Practicability; Effectiveness/cost-effectiveness; Acceptability; Side effects/safety; Equity) criteria guided the selection of BCT delivery formats. Results: Formats for delivering the 11 BCTs were agreed upon, for example, a paper medicines diary was selected to deliver the BCT ‘Self-monitoring of behaviour’. To help tailor the intervention, BCTs were categorised into ‘Core’ and ‘Optional’ BCTs. For example, ‘Feedback on behaviour’ and ‘Action planning’ were selected as ‘Core’ BCTs (delivered to all patients), whereas ‘Prompts and cues’ and ‘Health consequences’ were selected as ‘Optional’ BCTs. A paper-based adherence assessment tool was designed to guide intervention tailoring by mapping from identified adherence problems to BCTs. The intervention was designed for delivery over three appointments in the pharmacy including an adherence assessment at Appointment 1 and BCT delivery at Appointments 2 and 3. Conclusions: This paper details key decision-making processes involved in moving from a list of BCTs through to a complex intervention package which aims to improve older patients’ medication adherence. A novel approach to tailoring the content of a complex adherence intervention using ‘Core’ and ‘Optional’ BCT categories is also presented. The intervention is now ready for testing in a feasibility study with community pharmacists and patients to refine the content. It is hoped that this detailed report of the intervention content/design process will allow others to better interpret the future findings of this work.

6 July 2022 in Research in Social and Administrative Pharmacy
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Journal Article
Open access
ESEimear Ni Sheachnasaigh
Eimear Ni Sheachnasaigh
CCCathal Cadogan
Cathal Cadogan
JSJudith Strawbridge
Judith Strawbridge
Laura SahmLaura Sahm
Laura Sahm
Cristín RyanCristín Ryan
Cristín Ryan
There is an expectation from government, regulatory bodies, patients, the public, and other healthcare professions that pharmacists are competent professionals who can practice independently. Regulation of the profession requires pharmacy graduates to register with a recognised regulatory body before being considered 'ready to practise' independently. To examine the methods and processes used by national regulatory bodies to determine pharmacists' readiness to practise. A scoping review was conducted using three electronic databases (Embase, Scopus, CINAHL) and websites of national regulatory bodies. Articles were eligible for inclusion if they described the methods and processes used by regulatory bodies to determine pharmacists' readiness to practise. Data were extracted relating to readiness to practise, the registration exam and the role of newly qualified pharmacists, post-registration. Extracted data were collated using narrative descriptive summaries and accompanying tables. Identified data sources referred to registration of pharmacists across 11 different countries. No sources provided a definition for the term 'ready to practise'. Ten countries were identified as holding a registration examination with varying formats and curricula. Written and oral exams, competency based written assessments, Objective Structured Clinical Examinations and a combination of these were identified with written exam being the most popular (n = 8). In all but one country, the regulator was responsible for delivery of the exam. In most cases (n = 7), the exam was mapped to a pre-defined set of competencies with only a few (n = 4) explaining how these competencies were developed. Only two sources made reference to the role of the newly qualified pharmacist post-registration. The review has established a paucity of research and publicly available information on the methods and processes used by national regulators to determine pharmacists' readiness to practise. There is no pharmacy definition of being 'ready to practise'. Assessment methods vary widely and, currently, no gold standard is apparent.

19 December 2019 in BMC Geriatrics
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Journal Article
Open access
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Cristín RyanCristín Ryan
Cristín Ryan
RTRuth Teh
Ruth Teh
SMSimon Moyes
Simon Moyes
TWTim Wilkinson
Tim Wilkinson
MCMartin Connolly
Martin Connolly
Ngaire KerseNgaire Kerse
Ngaire Kerse
Background: Prescribing for older people is complex, and many studies have highlighted that appropriate prescribing in this cohort is not always achieved. However, the long-term effect of inappropriate prescribing on outcomes such as hospitalisation and mortality has not been demonstrated. The aim of this study was to determine the level of potentially inappropriate prescribing (PIP) for participants of the Life and Living in Advanced Age: A Cohort Study in New Zealand (LiLACS NZ) study at baseline and examine the association between PIP and hospitalisation and mortality at 12-months follow-up. Methods: PIP was determined using STOPP/START. STOPP identified potentially inappropriate medicines (PIMs) prescribed, START identified potential prescribing omissions (PPOs). STOPP/START were applied to all LiLACS NZ study participants, a longitudinal study of ageing, which includes 421 Māori aged 80–90 years and 516 non-Māori aged 85 years. Participants’ details (e.g. age, sex, living arrangements, socioeconomic status, physical functioning, medical conditions) were gathered by trained interviewers. Some participants completed a core questionnaire only, which did not include medications details. Medical conditions were established from a combination of self-report, review of hospital discharge and general practitioner records. Binary logistic regression, controlled for multiple potential confounders, was conducted to determine if either PIMs or PPOs were associated with hospital admissions and mortality (p < 0.05 was considered significant). Results: Full data were obtained for 267 Māori and 404 non-Māori. The mean age for Māori was 82.3(±2.6) years, and 84.6(±0.53) years for non-Māori. 247 potentially inappropriate medicines were identified, affecting 24.3% Māori and 28.0% non-Māori. PIMs were not associated with 12-month mortality or hospitalisation for either cohort (p > 0.05; adjusted models). 590 potential prescribing omissions were identified, affecting 58.1% Māori and 49.0% non-Māori. PPOs were associated with hospitalisation (p = 0.001 for Māori), but were not associated with risk of mortality (p > 0.05) for either cohort within the 12-month follow-up (adjusted models). Conclusion: PPOs were more common than PIMs and were associated with an increased risk of hospitalisation for Māori. This study highlights the importance of carefully considering all indicated medicines when deciding what to prescribe. Further follow-up is necessary to determine the long-term effects of PIP on mortality and hospitalisation.