John Ong

Dr. John Ong

Department of Medicine, University of Cambridge, Cambridge, Cambridgeshire, UK
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orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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20 March 2020 in Gut
Verified
Journal Article
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John OngJohn Ong
John Ong
BYBarnaby Edward Young
Barnaby Edward Young
SOSharon Ong
Sharon Ong

14 September 2019 in Biotechnology and Bioengineering
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Journal Article
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John OngJohn Ong
John Ong
JZJunzhe Zhao
Junzhe Zhao
AJAlexander W. Justin
Alexander W. Justin
Athina MarkakiAthina Markaki
Athina Markaki
Albumin, the most abundant plasma protein in mammals, is a versatile and easily obtainable biomaterial. It is pH and temperature responsive, dissolvable in high concentrations and gels readily in defined conditions. This versatility, together with its inexpensiveness and biocompatibility, makes albumin an attractive biomaterial for biomedical research and therapeutics. So far, clinical research in albumin has centered mainly on its use as a carrier molecule or nanoparticle to improve drug pharmacokinetics and delivery to target sites. In contrast, research in albumin‐based hydrogels is less established albeit growing in interest over recent years. In this minireview, we report current literature and critically discuss the synthesis, mechanical properties, biological effects and uses, biodegradability and cost of albumin hydrogels as a xeno‐free, customizable, and transplantable construct for tissue engineering and regenerative medicine.

26 December 2019 in Journal of Clinical Medicine
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Journal Article
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WLWan Yen Lim
Wan Yen Lim
John OngJohn Ong
John Ong
SOSharon Ong
Sharon Ong
YHYing Hao
Ying Hao
HAHairil Rizal Abdullah
Hairil Rizal Abdullah
UMUn Sam May Mok
Un Sam May Mok
The Maslach Burnout Inventory for healthcare professionals (MBI-HSS) and its abbreviated version (aMBI), are the most common tools to detect burnout in clinicians. A wide range in burnout prevalence is reported in anesthesiology, so this study aimed to ascertain which of these two tools most accurately detected burnout in our anesthesiology residents. The MBI-HSS and aMBI were distributed amongst 86 residents across three hospitals, with a total of 58 residents completing the survey (67.4% response rate; 17 male and 41 female). Maslach-recommended cut-offs for the MBI-HSS and the aMBI with standard cut-offs were used to estimate burnout prevalence, and actual prevalence was established clinically by a thorough review of multiple data sources. Burnout proportions reported by the MBI-HSS and aMBI were found to be significantly different; 22.4% vs. 62.1% respectively (p < 0.0001). Compared to the actual prevalence of burnout in our cohort, the MBI-HSS detected burnout most accurately; area under receiver operating characteristic of 0.99 (95% confidence interval (CI): 0.92–1.0). Although there was a good correlation between the MBI-HSS and aMBI subscale scores, the positive predictive value of the aMBI was poor; 33.3% (95% CI:27.5–39.8%), therefore caution and clinical correlation are advised when using the aMBI tool because of the high rates of false-positives.

11 March 2021 in Journal of Gastroenterology and Hepatology
Verified
Journal Article
Open access
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John OngJohn Ong
John Ong
CSCarla Swift
Carla Swift
MBMichael Bath
Michael Bath
SOSharon Ong
Sharon Ong
WLWan Yen Lim
Wan Yen Lim
YDYock Young Dan
Yock Young Dan
Background and Aims: Burnout is an important occupational hazard, and the scale of the problem within gastroenterology remains poorly understood. The primary objective of this study was to understand the prevalence of burnout in gastroenterology and ascertain if there was a common prevalence within the field. The secondary objective was to identify factors and job‐related stressors that commonly contribute to burnout in gastroenterologists.Methods: Systematic searches were conducted in PubMed, Scopus, Cochrane, and PsycINFO by two reviewers independently for articles published to 1 September 2020. The primary outcome measure was the reported prevalence of burnout in gastroenterologists. The secondary outcome measures were (i) the prevalence of non‐somatic burnout symptoms (emotional exhaustion, depersonalization, and low personal accomplishment) and (ii) the frequency of risk factors and stressors reported in studies. Data were presented, and limited meta‐analyses discussed.Results: Data were extracted from 11 studies. 54.5% (6/11) of these studies reported the prevalence of burnout in gastroenterologists; this ranged from 18.3% to 64.4%. Similar to burnout prevalence, burnout symptoms showed geographical variation and were common in gastroenterologists (up to 63.9%). Factors associated with work volume, age, and female gender were the three most frequently reported risk factors for increased levels of stress and burnout in 72.7% (8/11), 54.5% (6/11), and 45.5% (5/11) of studies, respectively. Significant methodological and clinical heterogeneity was observed.Conclusions: Burnout and its non‐somatic symptoms are common in gastroenterologists, but the syndrome is understudied within the field. Further research and good quality data are needed to help address the problem.

3 May 2019 in Journal of Clinical Gastroenterology
Verified
Journal Article
Closed access
John OngJohn Ong
John Ong
CSCarla Swift
Carla Swift
BSBenjamin G. Stokell
Benjamin G. Stokell
SOSharon Ong
Sharon Ong
PLPierino Lucarelli
Pierino Lucarelli
YAYasseen Al-Naeeb
Yasseen Al-Naeeb
Background and Goals: Bouveret syndrome is characterized by gastroduodenal obstruction caused by an impacted gallstone. Current literature recommends endoscopic therapy as the first line of intervention despite significantly lower success rates compared with surgery. The lack of treatment efficacy studies and the paucity of clinical guidelines contribute to current practices being arbitrary. The aim of this systematic review was to identify factors that predict outcomes of endoscopic therapy. Subsequently, a predictive tool was devised to predict the success of endoscopic therapy and recommendations were proposed to improve current management strategies of impacted gallstones in the upper gastrointestinal tract. Methods: A systematic search of PubMed, Medline, Cochrane, and Scopus was performed for articles that contained the terms “Bouveret syndrome,” “Bouveret’s syndrome,” “gallstone” AND “gastric obstruction” and “gallstone” AND “duodenal obstruction” that were published between January 1, 1950 to April 15, 2018. Articles were reviewed by 3 reviewers and raw data collated. χ2 and Kolmogorov-Smirnov tests were used to test associations between predictors and endoscopic outcomes. A logistic regression model was then used to create a predictive tool which was cross validated. Results: Failure of endoscopic therapy is associated with increasing gallstone length (P<0.0001) and impaction in the distal duodenum (P<0.05). Using multiple endoscopic modalities is associated with better success rates (P<0.05). The novel predictive tool predicted success of endoscopic therapy with an area under the receiver operating characteristic score of 0.86 (95% confidence interval: 0.79-0.94). Conclusion: In Bouveret syndrome, a selective approach to endoscopic therapy can expedite definitive treatment and improve current management strategies.

21 September 2018 in BMJ Open
Verified
Journal Article
Open access
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John OngJohn Ong
John Ong
CSCarla Swift
Carla Swift
NMNicholas Magill
Nicholas Magill
SOSharon Ong
Sharon Ong
ADAnne Day
Anne Day
ASArun Shankar
Arun Shankar
Objective To determine quantitatively if a positive association exists between the mentoring of junior doctors and better training outcomes in postgraduate medical training within the UK. Design Observational study. Participants 117 trainees from the East of England Deanery (non-mentored group) and the recently established Royal College of Physicians (RCP) Mentoring scheme (mentored group) who were core medical trainees (CMTs) between 2015 and 2017 completed an online survey. Trainees who received mentoring at the start of higher specialty training, incomplete responses and trainees who were a part of both the East of England deanery and RCP Mentoring scheme were excluded leaving 85 trainees in the non-mentored arm and 25 trainees in the mentored arm. Responses from a total of 110 trainees were analysed. Main outcome measures Pass rates of the various components of the Membership of the Royal College of Physicians (MRCP) (UK) examination (MRCP Part 1, MRCP Part 2 Written and MRCP Part 2 PACES), pass rates at the Annual Review of Competency Progression (ARCP), trainee involvement in significant events, clinical incidents or complaints and trainee feedback on career progression and confidence. Results Mentored trainees reported higher pass rates of the MRCP Part 1 exam versus non-mentored trainees (84.0% vs 42.4%, p<0.01). Mentored international medical graduates (IMGs) reported higher pass rates than non-mentored IMGs in the MRCP Part 2 Written exam (71.4% vs 24.0%, p<0.05). ARCP pass rates in mentored trainees were observed to be higher than non-mentored trainees (95.8% vs 69.9%, p<0.05). Rates of involvement in significant events, clinical incidents and complaints in both groups did not show any statistical difference. Mentored trainees reported higher confidence and career progression. Conclusions A positive association is observed between the mentoring of CMTs and better training outcomes. Further studies are needed to investigate the causative effects of mentoring in postgraduate medical training within the UK.