Yanna Ko

ORCID: 0000-0002-9569-2809
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About
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Research Areas
  • Inflammatory Bowel Disease
  • Microscopic Colitis
  • Eosinophilic Esophagitis
  • Biosimilars and Bioanalytical Methods
  • Leprosy Research and Treatment
  • Immunodeficiency and Autoimmune Disorders
  • Chronic Lymphocytic Leukemia Research
  • Pregnancy and Medication Impact
  • Gastric Cancer Management and Outcomes
  • Child Nutrition and Water Access
  • Infective Endocarditis Diagnosis and Management
  • Gastrointestinal disorders and treatments
  • Tuberculosis Research and Epidemiology
  • Pericarditis and Cardiac Tamponade
  • Mycobacterium research and diagnosis
  • Gastrointestinal Bleeding Diagnosis and Treatment
  • Liver Diseases and Immunity
  • IL-33, ST2, and ILC Pathways
  • Viral-associated cancers and disorders
  • Dysphagia Assessment and Management
  • Diverse Approaches in Healthcare and Education Studies
  • Colorectal and Anal Carcinomas
  • Viral Infections and Immunology Research
  • Health Systems, Economic Evaluations, Quality of Life
  • Kawasaki Disease and Coronary Complications

Camden and Campbelltown Hospitals
2021-2024

Western Sydney University
2023-2024

Canterbury Hospital
2024

Concord Repatriation General Hospital
2014-2024

Weatherford College
2023

Macquarie University
2023

The University of Sydney
2020-2022

Concord Hospital
2014-2016

UNSW Sydney
2012-2015

Bankstown Lidcombe Hospital
2015

<h3>Objective</h3> The rising incidence of inflammatory bowel disease in Asia supports the importance environmental risk factors aetiology. This prospective population-based case-control study Asia-Pacific examined prior to patients developing IBD. <h3>Design</h3> 442 incident cases (186 Crohn9s (CD); 256 UC; 374 Asians) diagnosed between 2011 and 2013 from eight countries Australia 940 controls (frequency-matched by sex, age geographical location; 789 completed an factor questionnaire at...

10.1136/gutjnl-2014-307410 article EN Gut 2014-09-12

The expanding options in advanced therapies for ulcerative colitis (UC) and Crohn's disease (CD) present challenges treatment selection. Persistence analysis assesses drug durability real-world settings, acting as a surrogate marker medication efficacy tolerance. Unlike traditional comparative studies, persistence provides insights extending beyond the initial year of treatment.

10.1111/apt.18006 article EN cc-by-nc Alimentary Pharmacology & Therapeutics 2024-04-23

Summary Background Medication persistence contributes real‐world evidence about treatment effectiveness, tolerability and prescriber patient acceptability. Aims To evaluate of biological agents in Crohn's disease (CD) ulcerative colitis (UC) the effects immunomodulator use lines. Methods Retrospective national population‐based data on for adalimumab, infliximab vedolizumab ustekinumab CD UC were analysed from Australian Pharmaceutical Benefits Scheme using Kaplan‐Meier analysis Cox...

10.1111/apt.16436 article EN Alimentary Pharmacology & Therapeutics 2021-06-20

Inflammatory bowel diseases (IBD) may result in disability. We aim to validate a novel scoring system for the IBD disability index (IBD-DI), and identify predictors of its correlation with work absenteeism. This prospective ambulatory clinic cohort study measured IBD-DI, Crohn's Disease Activity Index (CDAI) disease (CD) or partial Mayo score (pMayo) ulcerative colitis (UC), IBDQ quality-of-life, Work Productivity Impairment. Negative IBD-DI represented greater Validation tests were...

10.1016/j.crohns.2014.02.028 article EN Journal of Crohn s and Colitis 2014-03-22

The choice between infliximab (IFX) and vedolizumab (VED) as a first-line biological agent in moderate-to-severe ulcerative colitis (UC) can be difficult. Second-line efficacy may decline following prior treatment failure UC patients. However, it is not known whether second-line IFX declines after of VED.We aimed to compare persistence VED, particular VED.Persistence VED was analysed from the Australian Pharmaceutical Benefits Scheme registry data either first- or UC. Propensity score...

10.1177/17562848221080793 article EN cc-by-nc Therapeutic Advances in Gastroenterology 2022-01-01

INTRODUCTION: Comparative effectiveness research provides data on the relative benefits and risks between treatments. In Crohn's disease (CD), however, there are few head-to-head studies comparing advanced therapies none with long-term follow-up. Real-world effectiveness, defined by treatment persistence, obtained from prospective population-based patient cohorts, may help determine best sequencing positioning of biological agents. METHODS: We analyzed prospectively collected Australian...

10.14309/ajg.0000000000002679 article EN The American Journal of Gastroenterology 2024-01-26

Background/Aims To examine the association between use of oral contraceptive pills (OCPs) and risk developing inflammatory bowel diseases (IBD), in a modern cohort. Methods A prospective nested case-control study across sites Asia-Pacific region was conducted; involving female IBD cases asymptomatic controls. Subjects completed questionnaire addressing questions related to OCP use. Primary outcome development those exposed versus non-exposure. Secondary outcomes were Crohn's disease (CD)...

10.5217/ir.2018.16.3.409 article EN cc-by-nc Intestinal Research 2018-01-01

Supporting Information Video S1 showing index transthoracic echocardiography, demonstrating moderately reduced left ventricular systolic function, and serial marked improved of function Please note: The publisher is not responsible for the content or functionality any supporting information supplied by authors. Any queries (other than missing content) should be directed to corresponding author article.

10.5694/mja2.51554 article EN The Medical Journal of Australia 2022-05-23

Abstract Background Treatment persistence (duration of medication use) provides real-world evidence on therapeutic effectiveness, tolerability and prescriber patient preferences. Biological agent in Crohn’s disease (CD) ulcerative colitis (UC) was compared from a national population-based registry with no hierarchical prescribing order. We hypothesised immunotherapy co-therapy would increase for anti-TNF agents, but not non-anti-TNF agents due to reduced immunogenicity. Methods A randomly...

10.1093/ecco-jcc/jjz203.490 article EN Journal of Crohn s and Colitis 2020-01-01

Clinical: Diagnosis and outcome S57 Conclusions: Vitamin D deficiency is common in CD patients, but also healthy controls.For ethnicity, never using a solarium azathioprine use are associated with vitamin levels.Appropriate screening, the importance of dietary intake sunlight exposure should be stressed to both patients normal population.

10.1016/s1873-9946(13)60144-0 article EN Journal of Crohn s and Colitis 2013-02-01

Inflammatory bowel disease (IBD) experienced a rapid rise in incidence and prevalence developing countries that parallels rates of accelerated industrialization these regions.1 Migrant studies can investigate the epidemiological factors driving this change. Migrants form unique population for investigating evolving pattern IBD globally. Groups migrating from areas low to high will experience shorter time period between risk factor exposure onset. This is relevant those related lifestyle...

10.1111/jgh.14427 article EN Journal of Gastroenterology and Hepatology 2018-09-01

Introduction: Mr PH is a 33 yo man who was diagnosed with Ulcerative colitis (UC) in January 2021. He commenced on prednisone enema and mesalazine 4.8g partial improvement of symptoms. Case description/methods: returned to our clinic month later February 2021 new pleuritic chest pain. febrile 38.2 deg tachycardic 110 bpm. An ECG showed normal sinus rhythm but had widespread ST elevation PR depression. His cardiac enzyme troponin elevated 122ng/L (normal < 15) diagnosis pericarditis...

10.14309/01.ajg.0000783220.74727.c0 article EN The American Journal of Gastroenterology 2021-10-01
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