Public Health - Doctoral Theses

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    Implementation of health and social care standards in health and social care services: development and feasibility testing of an implementation support tool
    (University College Cork, 2023) Kelly Daly, Yvonne; Hegarty, Josephine; O'Rourke, Niamh; Keyes, Laura M.; Health Information and Quality Authority (HIQA); Health Research Board
    Introduction Health and social care standards are complex quality improvement interventions. Standards are typically made up of evidence-based statements that describe safe, high-quality, person-centred care as an outcome or process of care delivery. They involve multiple stakeholders from multiple levels in the health system and apply to diverse services. There is limited evidence to inform implementation strategies specifically tailored to support the implementation of standards. There is a need to apply evidence-based, rigorous and transparent methods when selecting strategies to support the implementation of standards. Researchers have consistently highlighted a research-to-practice gap in this area. This PhD research aimed to develop and test an evidence- and theory-informed intervention to guide the identification of appropriate implementation strategies and the selection of tailored support tools and actions for use when implementing a set of standards. Methods The Medical Research Council (MRC) framework for developing and evaluating complex interventions guided a multi-methods sequential approach. A) Standards were conceptualised by narratively synthesising 12 definitions of standards used by standard-setting bodies internationally. B) The evidence-base was gathered by conducting: a systematic review (n=35 included studies) to identify and describe enablers and barriers to implementing (inter)nationally endorsed standards; and C) a qualitative exploration (focus groups (n=6), individual interviews (n=8)) of individuals’ (n=38) experiences, enablers and barriers to implementing nationally endorsed standards in Ireland. D) These enablers and barriers were used alongside implementation science theory, tools and methodologies to develop a digital intervention. Programme theory guided the development process. The Consolidated Framework for Implementation Research (CFIR), CFIR-ERIC (Expert Recommendations for Implementing Change) matching tool and the Behaviour Change Wheel (BCW) were used to develop a prototype of the content and interactive logic within a digital intervention. E) Co-design workshops (n=3) were held to refine the digital intervention with intended users (n=7). F) A feasibility study was undertaken with end-users (n=14) using a survey that measured acceptability, appropriateness and feasibility. Results A) There was variation in how standard-setting bodies define standards. The commonalities among definitions included the terms ‘quality’, ‘statements’ and ‘performance.’ B) Thematic statements describing enablers (n=22) and barriers (n=24) were created. The most frequently reported enablers related to available support tools, education and shared learning. The most frequently reported barriers related to a lack of knowledge of standards, staffing issues and insufficient funds. C) Six themes were generated from qualitative interviews. Key enablers identified related to teamwork, support tools, leadership and inspections. Key barriers related to workforce issues, a lack of awareness of standards and fear of inspection outcomes. D) Twenty-three enablers and barriers were prioritised using set criteria. E) Iterative feedback led to refinements of the intervention, creating the prototype for the feasibility study. The intervention was entitled SITAS (Selecting Implementation Tools and Actions for Standards). F) SITAS was perceived as acceptable and feasible in preliminary feasibility testing. Conclusion A feasible intervention was developed, enhanced by user involvement. SITAS is a practical digitally enabled intervention that can facilitate bridging the research-to-practice gap. SITAS aims to guide the process of selecting and tailoring implementation strategies to specific contexts, using core concepts of implementation science. Further research is required to undertake formal piloting on SITAS using a larger sample size before spread and scale up.
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    The impact of maternal chronic hypertension and chronic kidney disease on the risk of adverse pregnancy outcomes and long-term cardiovascular disease: a population-based epidemiology study
    (University College Cork, 2022-08-31) Al Khalaf, Sukainah; Khashan, Ali; McCarthy, Fergus; O'Reilly, Eilis; Ministry of Health – Kingdom of Saudi Arabia
    Background and aims: The prevalence of chronic hypertension (CH) and chronic kidney disease (CKD) have increased among pregnant women in recent decades. Given the improvement in antenatal care over the last few decades, it is still unclear whether the risk of adverse pregnancy outcomes (APOs) among women with CH and/or CKD has decreased. There is limited evidence on the association between antihypertensive treatment and APOs in women with CH. Although there is evidence that women with a history of APOs have an increased risk of cardiovascular disease (CVD), it remains unclear whether pre-pregnancy hypertension and the occurrence of APOs would influence this association. The aim of this PhD project was to investigate the impact of maternal CH and/or CKD and antihypertensive treatment on the risk of APOs and long-term CVD. Structure and methods: This thesis includes eight chapters: Introduction, Methods, two systematic review articles on the impact of CH and CKD on APOs, three original research articles, and Discussion. Data from the Swedish National Registers were analysed to examine the associations between CH/CKD and the risk of APOs over the last three decades. Data from the UK CALIBER platform were used to investigate: i) the association between CH and APOs, with a focus on the role of antihypertensive treatment and control of hypertension, and ii) the associations between pre-pregnancy hypertension and subsequent diagnosis of 12 different CVDs, considering the role of APOs on these associations. Adverse pregnancy outcomes were pre-eclampsia, preterm birth, stillbirth, Caesarean section and small for gestational age (SGA). The statistical methods were done using logistic regression models for the Swedish data, logistic regression models with propensity score matching for the antihypertensive treatment analyses, while the associations between pre-pregnancy hypertension and CVD were analysed using stratified Cox models. All statistical models were adjusted for several potential confounders. Results: Systematic reviews and meta-analyses: CH was associated with 5-fold increased odds of pre-eclampsia and approximately 2-fold increased odds of stillbirth, preterm birth, and SGA, compared to women without CH. Women with treated CH (compared to untreated normotensive women) had higher odds of APOs. However, the results were inconsistent when outcomes were compared between treated and untreated women with CH; no increased odds of superimposed pre-eclampsia or other APOs were observed, except for 86% increased odds of SGA. Findings from the meta-analysis suggested that women with CKD had higher odds of pre-eclampsia, Caesarean section, preterm birth, very preterm birth, and SGA. All causes of CKD were associated with increased odds of pre-eclampsia, preterm birth, and SGA, with stronger associations in women with diabetic CKD, particularly for preterm birth [adjusted odds ratio (aOR): 4.76, (95% confidence interval (CI), 3.65–6.21)] and SGA [aOR: 4.50, (95% CI, 2.92–6.94)]. The findings according to the severity of kidney disease showed that later stages of CKD were associated with a greater odds of APOs than earlier stages. Swedish National Registers: The overall findings from this study suggested that the odds of APOs remain high in women with CH and/or CKD, and the odds persisted independent of parity, maternal age, and body mass index, among other potential confounders. No association was found between CKD and stillbirth. All causes of CKD were associated with higher odds of pre-eclampsia, emergency Caesarean section, and medically indicated preterm birth, and the ORs were higher in women with diabetic CKD, renovascular disease, and congenital kidney disease than other CKD subtypes. CALIBER studies: The results suggested a higher odds of APOs in women with CH (treated and untreated) compared to untreated normotensive women. In women with CH, those requiring treatment (versus untreated) had 17%, 25%, and 80% increased odds of superimposed pre-eclampsia, preterm birth, and fetal growth restriction (FGR), respectively. However, these results were mainly attributable to the level of blood pressure (BP) control among the treated group; as similar results were found between the untreated and treated women with CH who achieved tight control (BP<135/85 mmHg) for all assessed outcomes except for a 59% decreased odds of superimposed pre-eclampsia and a 55% increased odds of FGR. Pregnant women with CH who were prescribed methyldopa (versus β-blockers) had 43%, 59%, and 44% increased odds of superimposed pre-eclampsia, preterm birth, and very preterm birth, but 66% lower odds of FGR. No differences in outcomes were found in women who were prescribed calcium-channel-blockers (versus β-blockers) except for 94% increased odds of preterm birth. The magnitude of the associations increased with increasing BP, and the strongest associations were observed in women with severe hypertension (BP≥ 160/90 mmHg). In treated women with CH, less-tight (BP≥135/85 mmHg) versus tight (BP<135/85 mmHg) control was associated with almost 2-fold higher odds of superimposed pre-eclampsia, very preterm birth, and a 3-fold higher odds of severe hypertension. During the 20-year study period, 16,499 CVD incident were observed, of which two-thirds (66%) had occurred in young women (under 40 years). Pre-pregnancy hypertension (versus no pre-pregnancy hypertension) was associated with a 2-fold higher risk of any subsequent CVD. When the results were subclassified according to the presence of APOs, the strongest associations were found in women with pre-pregnancy hypertension and APOs across the 12 CVD; with almost a 3-fold increased risk to develop any subsequent CVD, an 8-fold increased risk of coronary heart disease, and a 10-fold increased risk of heart failure, compared to those who remained normotensive without APOs. Conclusions: This thesis indicated that CKD and CH were associated with a wide range of APOs than the general obstetric population. Therefore, multidisciplinary prenatal consultation and antenatal management should be provided for these women with close monitoring during pregnancy. If antihypertensive treatment is required, clinicians might consider tighter control during pregnancy as better outcomes were observed in women with tightly controlled hypertension. β-blockers might be superior in reducing APOs than methyldopa, with an exception for FGR, which was higher in the β-blockers group. Finally, the findings suggested strong associations between pre‐pregnancy hypertension with subsequent CVD, with a greater risk among women who had pre-pregnancy hypertension and APOs. Pre-pregnancy hypertension should be managed adequately during pregnancy to reduce the risk of APOs and subsequently reduce the risk of CVD, which emphasizes that a history of reproductive risk factors (including APOs) should be considered in screening tools for CVD beyond the postpartum period to optimize long-term cardiometabolic health in women.
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    Implementation of risk based monitoring into academic led clinical trials in Ireland
    (University College Cork, 2018) Hurley, Caroline; Eustace, Joe; Kearney, Patricia M.; Shiely, Frances; Clark, Mike; Flanagan, Evelyn; University College Cork; Health Research Board
    Introduction: In November 2016, the International Conference on Harmonsation (ICH) published a requirement for sponsors to develop a systematic, prioritised, risk-based approach to monitoring clinical trials. This process is more commonly known as Risk Based Monitoring (RBM). However, evidence suggested that a gold standard validated approach to RBM did not exist and it was unclear how sponsors would introduce RBM into their clinical trials units (CTUs). In 2014, Ireland, unlike countries such as Switzerland and the UK, did not have a national strategy to support the introduction of RBM into its publicly funded, academic-led CTUs. The absence of a national strategy and gold standard RBM approach meant it was not clear how RBM would be implemented in CTUs. Therefore, the overarching aim of this thesis was to develop, implement and evaluate a quality improvement intervention to support the introduction of RBM into academic-led clinical trials in Ireland. Methods: This thesis employed a multi-method research strategy directed by the Knowledge to Action (KTA) framework over four years from October 2014 to October 2018. The KTA framework is a conceptual framework to assist the translation of knowledge into sustainable, evidence-based interventions. This thesis used a range of research methods, implemented in four separate sequential phases, to address different components of the KTA framework which primarily involve knowledge creation and knowledge translations. The four phases first involved systematically reviewing the existing evidence of RBM methods. Then, in a mixed method study, I explored the attitudes, and perceived barriers and facilitators to the implementation of RBM in academic-led clinical trials in Ireland. Next, I did a document analysis study to examine the experience of monitoring in a clinical trial. Finally, I developed the quality improvement study by combining the results of the three earlier phases to identify the most appropriate quality improvement intervention to support RBM use in academic led clinical trials in Ireland. Results: The systematic review showed several tools exist to support the implementation of RBM. The mixed methods study showed a need for training and regulatory endorsed guidelines to support the implementation of RBM in academic-led clinical trials. The document analysis showed that on-site and centralised monitoring can be used simultaneously to fulfil ICH GCP’s seventeen monitoring requirements. The findings of these three studies were combined and a brief, face-to-face, interactive education workshop was identified as an effective way to encourage RBM tool usage among clinical researchers working in academic-led clinical trials in Ireland. Conclusion: Applying the KTA framework to empirical data has led to an intervention that is implementable in clinical practice and has the potential to positively change monitoring practices of clinical researchers. This thesis provides critical evidence on the complexities associated with implementing RBM in academic-led clinical trials. It provides practical recommendations to guide clinical researchers who wish to perform RBM.
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    Exploring the relationship between patterns of physical activity, sedentary behaviour and cardiometabolic health in middle-aged Irish adults
    (University College Cork, 2016) Dillon, Christina B.; Phillips, Catherine; Donnelly, Alan; Dahly, Darren; Health Research Board
    Background and Study Rationale Being physically active is a major contributor to both physical and mental health. More specifically, being physically active lowers risk of coronary heart disease, high blood pressure, stroke, metabolic syndrome (MetS), diabetes, certain cancers and depression, and increases cognitive function and wellbeing. The physiological mechanisms that occur in response to physical activity and the impact of total physical activity and sedentary behaviour on cardiometabolic health have been extensively studied. In contrast, limited data evaluating the specific effects of daily and weekly patterns of physical behaviour on cardiometabolic health exist. Additionally, no other study has examined interrelated patterns and minute-by-minute accumulation of physical behaviour throughout the day across week days in middle-aged adults. Study Aims The overarching aims of this thesis are firstly to describe patterns of behaviour throughout the day and week, and secondly to explore associations between these patterns and cardiometabolic health in a middle-aged population. The specific objectives are to: 1 Compare agreement between the International Physical Activity Questionnaire-Short Form (IPAQ-SF) and GENEActiv accelerometer-derived moderate-to-vigorous (MVPA) activity and secondly to compare their associations with a range of cardiometabolic and inflammatory markers in middle-aged adults. 2 Determine a suitable monitoring frame needed to reliably capture weekly, accelerometer-measured, activity in our population. 3 Identify groups of participants who have similar weekly patterns of physical behaviour, and determine if underlying patterns of cardiometabolic profiles exist among these groups. 4 Explore the variation of physical behaviour throughout the day to identify whether daily patterns of physical behaviour vary by cardiometabolic health. Methods All results in this thesis are based on data from a subsample of the Mitchelstown Cohort; 475 (46.1% males; mean aged 59.7±5.5 years) middle-aged Irish adults. Subjective physical activity levels were assessed using the IPAQ-SF. Participants wore the wrist GENEActiv accelerometer for 7 consecutive days. Data was collected at 100Hz and summarised into a signal magnitude vector using 60s epochs. Each time interval was categorised based on validated cut-offs. Data on cardiometabolic and inflammatory markers was collected according to standard protocol. Cardiometabolic outcomes (obesity, diabetes, hypertension and MetS) were defined according to internationally recognised definitions by World Health Organisation (WHO) and Irish Diabetes Federation (IDF). Results The results of the first chapter suggest that the IPAQ-SF lacks the sensitivity to assess patterning of activity and guideline adherence and assessing the relationship with cardiometabolic and inflammatory markers. Furthermore, GENEActiv accelerometer-derived MVPA appears to be better at detecting relationships with cardiometabolic and inflammatory markers. The second chapter examined variations in day-to-day physical behaviour levels between- and within-subjects. The main findings were that Sunday differed from all other days in the week for sedentary behaviour and light activity and that a large within-subject variation across days of the week for vigorous activity exists. Our data indicate that six days of monitoring, four weekdays plus Saturday and Sunday, are required to reliably estimate weekly habitual activity in all activity intensities. In the next chapter, latent profile analysis of weekly, interrelated patterns of physical behaviour identified four distinct physical behaviour patterns; Sedentary Group (15.9%), Sedentary; Lower Activity Group (28%), Sedentary; Higher Activity Group (44.2%) and a Physically Active Group (11.9%). Overall the Sedentary Group had poorer outcomes, characterised by unfavourable cardiometabolic and inflammatory profiles. The remaining classes were characterised by healthier cardiometabolic profiles with lower sedentary behaviour levels. The final chapter, which aimed to compare daily cumulative patterns of minute-by-minute physical behaviour intensities across those with and without MetS, revealed significant differences in weekday and weekend day MVPA. In particular, those with MetS start accumulating MVPA later in the day and for a shorted day period. Conclusion In conclusion, the results of this thesis add to the evidence base regards an optimal monitoring period for physical behaviour measurement to accurately capture weekly physical behaviour patterns. In addition, the results highlight whether weekly and daily distribution of activity is associated with cardiometabolic health and inflammatory profiles. The key findings of this thesis demonstrate the importance of daily and weekly physical behaviour patterning of activity intensity in the context of cardiometabolic health risk. In addition, these findings highlight the importance of using physical behaviour patterns of free-living adults observed in a population-based study to inform and aid health promotion activity programmes and primary care prevention and treatment strategies and development of future tailored physical activity based interventions.
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    The effect of complex workplace dietary interventions on employees dietary behaviours, nutrition knowledge and health status
    (University College Cork, 2015) Geaney, Fiona; Harrington, Janas; Perry, Ivan J.; Greiner, Birgit; McKenzie, Kenneth; Health Research Board; Irish Heart Foundation; Department of Agriculture, Fisheries and Food, Ireland
    Background The growing prevalence and associated burden of diet-related non-communicable diseases is a global public health concern. The environments in which people live and work influences their dietary behaviours. Aim The focus of this thesis was on the effectiveness of complex workplace dietary interventions. The comparative effectiveness of a complex workplace environmental dietary modification intervention and an educational intervention were assessed both alone and in combination relative to a control workplace setting. Methods The systematic review was guided by the PRISMA statement. In a cluster controlled trial, four workplaces were purposively allocated to control, nutrition education alone (Education), environmental dietary modification alone (Environment) and nutrition education and environmental dietary modification (Combined intervention). The interventions were guided by the MRC framework. In the control workplace, data were collected at baseline and follow-up. In the intervention related sub-study, the relationships between nutrition knowledge, diet quality and hypertension were examined. Results The systematic review provided limited evidence. In the FCW study, 850 employees aged 18-64 years were recruited at baseline with N(response rate %) in each workplace as follows: Control: 111(72%), Education: 226(71%), Environment: 113(91%), Combined intervention: 400(61%). Complete follow-up data was obtained for 517 employees (61%). There were significant positive changes in dietary intakes of saturated fat(p=0.013), salt(p=0.010) and nutrition knowledge(p=0.034) between baseline and follow-up at 7-9 months in the combined intervention versus the control workplace in the fully adjusted multivariate analysis. Small but significant changes in BMI(-1.2kg/m2 (p=0.047) were also observed in the combined intervention. In the sub-study, nutrition knowledge was positively significantly associated with diet quality and blood pressure but no evidence of a mediation effect of the DASH score was detected between nutrition knowledge and blood pressure. Conclusion This thesis provides critical evidence on the effectiveness of complex workplace dietary interventions in a manufacturing working population.