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Featured researches published by Nikolaos Mastellos.


Implementation Science | 2015

A cluster randomised controlled trial evaluating the effectiveness of eHealth-supported patient recruitment in primary care research: the TRANSFoRm study protocol

Nikolaos Mastellos; Anna Andreasson; Kit Huckvale; Mark E. Larsen; Vasa Curcin; Josip Car; Lars Agréus; Brendan Delaney

BackgroundOpportunistic recruitment is a highly laborious and time-consuming process that is currently performed manually, increasing the workload of already busy practitioners and resulting in many studies failing to achieve their recruitment targets. The Translational Medicine and Patient Safety in Europe (TRANSFoRm) platform enables automated recruitment, data collection and follow-up of patients, potentially improving the efficiency, time and costs of clinical research. This study aims to assess the effectiveness of TRANSFoRm in improving patient recruitment and follow-up in primary care trials.Methods/designThis multi-centre, parallel-arm cluster randomised controlled trial will compare TRANSFoRm-supported with standard opportunistic recruitment. Participants will be general practitioners and patients with gastro-oesophageal reflux disease from 40 primary care centres in five European countries. Randomisation will take place at the care centre level. The intervention arm will use the TRANSFoRm tools for recruitment, baseline data collection and follow-up. The control arm will use web-based case report forms and paper self-completed questionnaires. The primary outcome will be the proportion of eligible patients successfully recruited at the end of the 16-week recruitment period. Secondary outcomes will include the proportion of recruited patients with complete baseline and follow-up data and the proportion of participants withdrawn or lost to follow-up. The study will also include an economic evaluation and measures of technology acceptance and user experience.DiscussionThe study should shed light on the use of eHealth to improve the effectiveness of recruitment and follow-up in primary care research and provide an evidence base for future eHealth-supported recruitment initiatives. Reporting of results is expected in October 2015.Trial registrationEudraCT: 2014-001314-25


BMC Medical Informatics and Decision Making | 2016

Feasibility of extracting data from electronic medical records for research: an international comparative study.

Michelle Helena van Velthoven; Nikolaos Mastellos; Azeem Majeed; John O’Donoghue; Josip Car

BackgroundElectronic medical records (EMR) offer a major potential for secondary use of data for research which can improve the safety, quality and efficiency of healthcare. They also enable the measurement of disease burden at the population level. However, the extent to which this is feasible in different countries is not well known. This study aimed to: 1) assess information governance procedures for extracting data from EMR in 16 countries; and 2) explore the extent of EMR adoption and the quality and consistency of EMR data in 7 countries, using management of diabetes type 2 patients as an exemplar.MethodsWe included 16 countries from Australia, Asia, the Middle East, and Europe to the Americas. We undertook a multi-method approach including both an online literature review and structured interviews with 59 stakeholders, including 25 physicians, 23 academics, 7 EMR providers, and 4 information commissioners. Data were analysed and synthesised thematically considering the most relevant issues.ResultsWe found that procedures for information governance, levels of adoption and data quality varied across the countries studied. The required time and ease of obtaining approval also varies widely. While some countries seem ready for secondary uses of data from EMR, in other countries several barriers were found, including limited experience with using EMR data for research, lack of standard policies and procedures, bureaucracy, confidentiality, data security concerns, technical issues and costs.ConclusionsThis is the first international comparative study to shed light on the feasibility of extracting EMR data across a number of countries. The study will inform future discussions and development of policies that aim to accelerate the adoption of EMR systems in high and middle income countries and seize the rich potential for secondary use of data arising from the use of EMR solutions.


PLOS ONE | 2015

Development of the CHARIOT Research Register for the Prevention of Alzheimer’s Dementia and Other Late Onset Neurodegenerative Diseases

Mark E. Larsen; Lisa Curry; Nikolaos Mastellos; Catherine Robb; Josip Car; Lefkos Middleton

Background Identifying cognitively healthy people at high risk of developing dementia is an ever-increasing focus. These individuals are essential for inclusion in observational studies into the natural history of the prodromal and early disease stages and for interventional studies aimed at prevention or disease modification. The success of this research is dependent on having access to a well characterised, representative and sufficiently large population of individuals. Access to such a population remains challenging as clinical research has, historically, focussed on patients with dementia referred to secondary and tertiary services. The primary care system in the United Kingdom allows access to a true prodromal population prior to symptoms emerging and specialist referral. We report the development and recruitment rates of the CHARIOT register, a primary care-based recruitment register for research into the prevention of dementia. The CHARIOT register was designed specifically to support recruitment into observational natural history studies of pre-symptomatic or prodromal dementia stages, and primary or secondary prevention pharmaceutical trials or other prevention strategies for dementia and other cognitive problems associated with ageing. Methods Participants were recruited through searches of general practice lists across the west and central London regions. Invitations were posted to individuals aged between 60 and 85 years, without a diagnosis of dementia. Upon consent, a minimum data set of demographic and contact details was extracted from the patient’s electronic health record. Results To date, 123 surgeries participated in the register, recruiting a total of 24,509 participants–a response rate of 22.3%. The age, gender and ethnicity profiles of participants closely match that of the overall eligible population. Higher response rates tended to be associated with larger practices (r = 0.34), practices with a larger older population (r = 0.27), less socioeconomically disadvantaged practices (r = 0.68), and practices with a higher proportion of White patients (r = 0.82). Discussion Response rates are comparable to other registers reported in the literature, and indicate good interest and support for a research register and for participation in research for the prevention of age-related neurodegenerative diseases and dementia. We consider that the simplicity of the approach means that this system is easily scalable and replicable across the UK and internationally.


Journal of innovation in health informatics | 2014

Using information to deliver safer care: a mixed-methods study exploring general practitioners' information needs in North West London primary care.

Nikolaos Mastellos; Josip Car; Azeem Majeed; Paul Aylin

Background The National Health Service in England has given increasing priority to improving inter-professional communication, enabling better management of patients with chronic conditions and reducing medical errors through effective use of information. Despite considerable efforts to reduce patient harm through better information usage, medical errors continue to occur, posing a serious threat to patient safety. Objectives This study explores the range, quality and sophistication of existing information systems in primary care with the aim to capture what information practitioners need to provide a safe service and identify barriers to its effective use in care pathways. Method Data were collected through semi-structured interviews with general practitioners from surgeries in North West London and a survey evaluating their experience with information systems in care pathways. Results Important information is still missing, specifically discharge summaries detailing medication changes and changes in the diagnosis and management of patients, blood results ordered by hospital specialists and findings from clinical investigations. Participants identified numerous barriers, including the communication gap between primary and secondary care, the variable quality and consistency of clinical correspondence and the inadequate technological integration. Conclusion Despite attempts to improve integration and information flow in care pathways, existing systems provide practitioners with only partial access to information, hindering their ability to take informed decisions. This study offers a framework for understanding what tools should be in place to enable effective use of information in primary care.


BMC Medical Education | 2018

Training community healthcare workers on the use of information and communication technologies: a randomised controlled trial of traditional versus blended learning in Malawi, Africa

Nikolaos Mastellos; Tammy Tran; Kanika Dharmayat; Elizabeth Cecil; Hsin-yi Lee; Cybele P. Wong; Winnie Mkandawire; Emmanuel Ngalande; Joseph Tsung-Shu Wu; Victoria Hardy; Baxter Griphin Chirambo; John O’Donoghue

BackgroundDespite the increasing uptake of information and communication technologies (ICT) within healthcare services across developing countries, community healthcare workers (CHWs) have limited knowledge to fully utilise computerised clinical systems and mobile apps. The ‘Introduction to Information and Communication Technology and eHealth’ course was developed with the aim to provide CHWs in Malawi, Africa, with basic knowledge and computer skills to use digital solutions in healthcare delivery. The course was delivered using a traditional and a blended learning approach.MethodsTwo questionnaires were developed and tested for face validity and reliability in a pilot course with 20 CHWs. Those were designed to measure CHWs’ knowledge of and attitudes towards the use of ICT, before and after each course, as well as their satisfaction with each learning approach. Following validation, a randomised controlled trial was conducted to assess the effectiveness of the two learning approaches. A total of 40 CHWs were recruited, stratified by position, gender and computer experience, and allocated to the traditional or blended learning group using block randomisation. Participants completed the baseline and follow-up questionnaires before and after each course to assess the impact of each learning approach on their knowledge, attitudes, and satisfaction. Per-item, pre-post and between-group, mean differences for each approach were calculated using paired and unpaired t-tests, respectively. Per-item, between-group, satisfaction scores were compared using unpaired t-tests.ResultsScores across all scales improved after attending the traditional and blended learning courses. Self-rated ICT knowledge was significantly improved in both groups with significant differences between groups in seven domains. However, actual ICT knowledge scores were similar across groups. There were no significant differences between groups in attitudinal gains. Satisfaction with the course was generally high in both groups. However, participants in the blended learning group found it more difficult to follow the content of the course.ConclusionsThis study shows that there is no difference between blended and traditional learning in the acquisition of actual ICT knowledge among community healthcare workers in developing countries. Given the human resource constraints in remote resource-poor areas, the blended learning approach may present an advantageous alternative to traditional learning.


Cochrane Database of Systematic Reviews | 2014

Transtheoretical model stages of change for dietary and physical exercise modification in weight loss management for overweight and obese adults

Nikolaos Mastellos; Laura Gunn; Lambert Felix; Josip Car; Azeem Majeed


International Journal of Integrated Care | 2013

Integrated care pilot in north west London: a mixed methods evaluation

Natasha Curry; Matthew Harris; Laura Gunn; Yannis Pappas; Ian Blunt; Michael Soljak; Nikolaos Mastellos; Holly Holder; Judith Smith; Azeem Majeed; Agnieszka Ignatowicz; Felix Greaves; Athina Belsi; Nicola Costin-Davis; Jessica D. Jones Nielsen; Geva Greenfield; Elizabeth Cecil; Susan Patterson; Josip Car; Martin Bardsley


Cochrane Database of Systematic Reviews | 2016

Automated telephone communication systems for preventive healthcare and management of long-term conditions

Pawel Posadzki; Nikolaos Mastellos; Rebecca Ryan; Laura Gunn; Lambert M Felix; Yannis Pappas; Marie-Pierre Gagnon; Steven A. Julious; Liming Xiang; Brian Oldenburg; Josip Car


International Journal of Integrated Care | 2014

Assessing patients’ experience of integrated care: a survey of patient views in the North West London Integrated Care Pilot

Nikolaos Mastellos; Laura Gunn; Matthew Harris; Azeem Majeed; Josip Car; Yannis Pappas


Family Practice | 2016

Feasibility and acceptability of TRANSFoRm to improve clinical trial recruitment in primary care

Nikolaos Mastellos; Grzegorz Bliźniuk; Dorota Czopnik; Mark McGilchrist; Andrzej Misiaszek; Piotr Bródka; Vasa Curcin; Josip Car; Brendan Delaney; Anna Andreasson

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Josip Car

Nanyang Technological University

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Azeem Majeed

Imperial College London

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Victoria Hardy

University of Washington

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Ciara Heavin

University College Cork

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Tammy Tran

Imperial College London

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