By Professor Andrew Stewart Day

Journal articles

Forbes AJ; Day AS; Frampton CMA; Gearry RB, 2025, 'Compounding Prevalence of Inflammatory Bowel Disease in a 2024 Population-Based Study From Canterbury, New Zealand', Jgh Open, 9, http://dx.doi.org/10.1002/jgh3.70192

Vernon-Roberts A; Day AS, 2025, 'Factors Affecting Disease Activity in Children and Adults with Inflammatory Bowel Disease: An Exploration of Pro-Inflammatory and Anti-Inflammatory Elements', Gastrointestinal Disorders, 7, http://dx.doi.org/10.3390/gidisord7020031

Ritchie K; Vernon-Roberts A; Day AS, 2025, 'Role of noncontrast enhanced abdominal ultrasound in the diagnostic assessment of pediatric inflammatory bowel disease', Journal of Pediatric Gastroenterology and Nutrition, 80, pp. 979 - 987, http://dx.doi.org/10.1002/jpn3.70044

Borichevsky GM; Swaminathan A; Smith BR; Edwards TS; Ashby LV; Frampton CMA; Day AS; Gearry RB; Kettle AJ, 2025, 'Myeloperoxidase Enzyme Activity in Feces Reflects Endoscopic Severity in Inflammatory Bowel Disease.', Inflamm Bowel Dis, http://dx.doi.org/10.1093/ibd/izaf109

O’Donnell JEM; Leach ST; Bowcock NL; Chen S; Gupta N; Jiang K; Lopez RN; Messenger R; Nahidi L; Shapiro A; Day AS; Lemberg DA, 2025, 'Daily Vitamin D3 Versus Stoss Vitamin D3 for Correction of 25OHD Deficiency in Children with Inflammatory Bowel Disease, a Randomised Controlled Trial', Digestive Diseases and Sciences, 70, pp. 1844 - 1853, http://dx.doi.org/10.1007/s10620-025-08913-3

Huang HQ; Li P; Vernon-Roberts A; Day AS; Liu BL; Wu ZR; Liu YL; Ye QR; Wang H, 2025, 'The Inflammatory Bowel Disease Knowledge Inventory Device 2 (IBD-KID2) is an effective tool for measuring disease-specific knowledge in Chinese patients', Plos One, 20, http://dx.doi.org/10.1371/journal.pone.0321036

Edwards TS; Ho SSC; Brown SC; Appleton L; Smith BR; Borichevsky GM; Swaminathan A; Frampton CMA; Gearry RB; Kettle AJ; Day AS, 2025, 'Fecal Myeloperoxidase Levels Reflect Disease Activity in Children With Crohn’s Disease', Inflammatory Bowel Diseases, 31, pp. 800 - 811, http://dx.doi.org/10.1093/ibd/izae262

Philpott H; Lemberg DA; Day AS; Rosenbaum J; Singh H; Rumore S; Ellison S; Couper M; Porter J; Roberts A; Thacker K; Moore D; Furata G; Sharma A, 2025, 'Characteristics and management of eosinophilic esophagitis in Australasian children: a decade of experience', Internal Medicine Journal, 55, pp. 284 - 289, http://dx.doi.org/10.1111/imj.16558

Forbes AJ; Day AS; Frampton CMA; Gearry RB, 2025, 'Incidence of Inflammatory Bowel Disease in Canterbury, New Zealand, 2018–2023', Digestive Diseases and Sciences, 70, pp. 719 - 727, http://dx.doi.org/10.1007/s10620-024-08811-0

Aitchison A; Edwards TS; Day AS, 2025, 'Simulated gastrointestinal digestion of milk caseins containing A1 β-casein does not lead to increased production of inflammatory proteins in intestinal epithelial cells in vitro when compared to milk caseins containing A2 β-casein.', Journal of Functional Foods, 125, http://dx.doi.org/10.1016/j.jff.2025.106669

Forbes AJ; Frampton CMA; Day AS; Gearry RB, 2025, '20-Year Mortality in a Population-Based Cohort of Patients with Inflammatory Bowel Disease from New Zealand', Digestive Diseases and Sciences, http://dx.doi.org/10.1007/s10620-025-09180-y

Liu GXH; Day AS, 2025, 'Alpha Fail: Ustekinumab to the Rescue After TNFα Failure in Patients with Moderate to Severe Crohn’s Disease', Digestive Diseases and Sciences, http://dx.doi.org/10.1007/s10620-025-09090-z

Swaminathan A; Borichevsky GM; Frampton CM; Day AS; Hampton MB; Kettle AJ; Gearry RB, 2025, 'Comparison of Fecal Calprotectin and Myeloperoxidase in Predicting Outcomes in Inflammatory Bowel Disease', Inflammatory Bowel Diseases, 31, pp. 28 - 36, http://dx.doi.org/10.1093/ibd/izae032

Vernon-Roberts A; Day AS, 2025, 'Concise Commentary: Do Population Migrations Affect the Incidence, Severity, and Outcomes of Inflammatory Bowel Disease?', Digestive Diseases and Sciences, http://dx.doi.org/10.1007/s10620-025-08972-6

O’Donnell JEM; Leach ST; Bowcock NL; Chen S; Gupta N; Jiang K; Lopez RN; Messenger R; Nahidi L; Shapiro A; Day AS; Lemberg DA, 2025, 'Correction to: Daily Vitamin D3 Versus Stoss Vitamin D3 for Correction of 25OHD Deficiency in Children with Inflammatory Bowel Disease, a Randomised Controlled Trial (Digestive Diseases and Sciences, (2025), 10.1007/s10620-025-08913-3)', Digestive Diseases and Sciences, http://dx.doi.org/10.1007/s10620-025-09061-4

Day AS, 2025, 'Editorial: Insights in pediatric gastroenterology, hepatology & nutrition', Frontiers in Pediatrics, 13, http://dx.doi.org/10.3389/fped.2025.1601516

Verma SK; Wakhlu A; Verma S; Sudhir Verma ; Day AS; Nair NP, 2025, 'Epidemiology & genotyping of rotavirus gastroenteritis and rotavirus associated intussusception in preschool children in central Uttar Pradesh', Clinical Epidemiology and Global Health, 31, http://dx.doi.org/10.1016/j.cegh.2024.101900

Parcińska K; Vernon-Roberts A; Day AS; Banaszkiewicz A, 2025, 'Tłumaczenie i walidacja kwestionariusza IBD-KID2 – Co dzieci z nieswoistym zapaleniem jelit wiedzą o swojej chorobie?', Przegląd Pediatryczny, 54, pp. 47 - 54, http://dx.doi.org/10.26625/10194

Coffey MJ; van Dorst J; Pushpakumara BU; Hudson J; Halim J; Day AS; Oliver M; Ranganathan S; Wainwright C; Selvadurai H; Thomas T; Jaffe A; Ooi CY, 2025, 'WS19.06 Probiotics and the EARly Life effects on intestinal bacteria and inflammation in children with Cystic Fibrosis (PEARL-CF) Study', Journal of Cystic Fibrosis, 24, pp. S35 - S36, http://dx.doi.org/10.1016/j.jcf.2025.03.676

Vernon-Roberts A; Blay L; Day AS, 2024, 'Inflammatory Bowel Disease Knowledge and Education Among Healthcare Professional Groups', Digestive Diseases and Sciences, 69, pp. 4491 - 4492, http://dx.doi.org/10.1007/s10620-024-08719-9

Hall S; Kenrick K; Day AS; Vernon-Roberts A, 2024, 'Access to gluten-free foods for people with coeliac disease in New Zealand', New Zealand Medical Journal, 137, pp. 22 - 39, http://dx.doi.org/10.26635/6965.6642

Swaminathan A; Day AS; Sparrow MP; Peyrin-Biroulet L; Siegel CA; Gearry RB, 2024, 'Review article: Measuring disease severity in inflammatory bowel disease – Beyond treat to target', Alimentary Pharmacology and Therapeutics, 60, pp. 1176 - 1199, http://dx.doi.org/10.1111/apt.18231

Forbes AJ; Frampton CMA; Day AS; Kaplan GG; Gearry RB, 2024, 'The Epidemiology of Inflammatory Bowel Disease in Oceania: A Systematic Review and Meta-Analysis of Incidence and Prevalence', Inflammatory Bowel Diseases, 30, pp. 2076 - 2086, http://dx.doi.org/10.1093/ibd/izad295

McLay L; Hunter J; Ballam K; Marie Emerson L; Day AS; Vandeleur M; Dalton S; Radcliffe Z; Woodford E, 2024, 'An evaluation of psychosocial sleep interventions for children with chronic health conditions: A systematic review', Sleep Medicine Reviews, 77, http://dx.doi.org/10.1016/j.smrv.2024.101962

Liu GXH; Day AS, 2024, 'Plant-based Diets for Inflammatory Bowel Disease: What Is the Evidence?', Inflammatory Bowel Diseases, 30, pp. 1865 - 1876, http://dx.doi.org/10.1093/ibd/izad213

Forbes AJ; Frampton CMA; Day AS; DeVries M; McVicar N; Su H; Gearry RB, 2024, 'Ten-year outcomes of a prospective population-based incidence cohort of inflammatory bowel disease patients from Canterbury, New Zealand', Jgh Open, 8, http://dx.doi.org/10.1002/jgh3.70038

Magen-Rimon R; Day AS; Shaoul R, 2024, 'An Overview of Nutritional Interventions in Inflammatory Bowel Diseases', Nutrients, 16, http://dx.doi.org/10.3390/nu16183055

Vernon-Roberts A; Verma S; Day AS; Ho SSC, 2024, 'Meta-analysis: High pooled positive predictive value of the European Society of Paediatric Gastroenterology, Hepatology and Nutrition no-biopsy approach for coeliac disease testing in children', Alimentary Pharmacology and Therapeutics, 60, pp. 672 - 685, http://dx.doi.org/10.1111/apt.18177

Khayatan D; Lemberg DA; Day AS, 2024, 'The Role of Topical Tacrolimus in the Management of Inflammatory Bowel Disease: A Comprehensive Review', Journal of Clinical Medicine, 13, http://dx.doi.org/10.3390/jcm13185518

Swaminathan A; Day AS, 2024, 'Measures of Gut Inflammation in Patients with Inflammatory Bowel Disease: Are Blood-Based Biomarkers Sufficient?', Digestive Diseases and Sciences, 69, pp. 2723 - 2724, http://dx.doi.org/10.1007/s10620-024-08567-7

Swaminathan A; Borichevsky GM; Frampton C; Kettle AJ; Peyrin-Biroulet L; Siegel CA; Day AS; Gearry RB, 2024, 'Development and investigation of a non-invasive disease severity index for inflammatory bowel disease.', J Crohns Colitis, 18, pp. 2023 - 2032, http://dx.doi.org/10.1093/ecco-jcc/jjae106

Hall S; Kenrick K; Day AS; Vernon-Roberts A, 2024, 'A Systematic Review of Tools to Assess Coeliac Disease-Related Knowledge', Journal of Clinical Medicine, 13, http://dx.doi.org/10.3390/jcm13144053

Bener A; Tokaç M; Tewfik I; Zughaier SM; Ağan AF; Day AS, 2024, 'Breastfeeding Duration Reduces the Risk of Childhood Leukemia and Modifies the Risk of Developing Functional Gastrointestinal Disorders', Breastfeeding Medicine, 19, pp. 539 - 546, http://dx.doi.org/10.1089/bfm.2024.0033

Mathias RM; Chu MKW; Edwards S; Day AS; Ma C; Jairath V; Bryant RV, 2024, 'Editorial: Sonographic assessment of colonic content—A new tool for constipation? Authors' reply', Alimentary Pharmacology and Therapeutics, 60, pp. 296 - 297, http://dx.doi.org/10.1111/apt.18109

Mathias RM; Chu MKW; Edwards S; Day AS; Ma C; Jairath V; Bryant RV, 2024, 'Meta-analysis: Intestinal ultrasound to evaluate colonic contents and constipation', Alimentary Pharmacology and Therapeutics, 60, pp. 6 - 16, http://dx.doi.org/10.1111/apt.18029

Denny A; Day AS; Vernon-Roberts A, 2024, 'Association between Paediatric Complementary and Alternative Medicine Use and Parental Health Literacy, Child Health, and Socio-Economic Variables: A Prospective Study', Pediatric Reports, 16, pp. 368 - 384, http://dx.doi.org/10.3390/pediatric16020032

Grover Z; Day AS, 2024, 'Novel pharmacological developments in the management of paediatric inflammatory bowel disease', Journal of Paediatrics and Child Health, 60, pp. 162 - 163, http://dx.doi.org/10.1111/jpc.16607

Klomberg RCW; Hellendoorn AE; Kemos P; Rizopoulos D; Ruemmele FM; Croft NM; de Ridder L; van der Woerd WL; Sunseri WM; Posovszky C; Urlep D; Giles EM; Misak Z; Ebach DR; Pujol- Muncunill G; Griffiths AM; Day AS; Carroll MW; Schaart MW; Morris MA; Ong SY; Szitanyi P, 2024, 'Rare and severe adverse events in children with inflammatory bowel disease: analysis of data from the PIBD-SETQuality Safety Registry', Lancet Child and Adolescent Health, 8, pp. 422 - 432, http://dx.doi.org/10.1016/S2352-4642(24)00078-6

Swaminathan A; Day AS; Gearry RB, 2024, 'Assessing disease severity in inflammatory bowel disease - Can we reliably encompass the full burden of illness?', Digestive and Liver Disease, 56, pp. 905 - 906, http://dx.doi.org/10.1016/j.dld.2024.01.185

Vernon-Roberts A; Humphrey O; Day AS, 2024, 'Exploring the Diagnostic Spectrum of Children with Raised Faecal Calprotectin Levels', Children, 11, http://dx.doi.org/10.3390/children11040420

Vernon-Roberts A; Safe M; Day AS, 2024, 'Editorial: Pediatric Functional Gastrointestinal Disorders: Challenges in Diagnosis and Treatment', Gastrointestinal Disorders, 6, pp. 308 - 312, http://dx.doi.org/10.3390/gidisord6010021

Vernon-Roberts A; Day AS, 2024, 'Patterns of vitamin D testing and supplementation for children with inflammatory bowel disease in Australasia', Jgh Open, 8, http://dx.doi.org/10.1002/jgh3.13041

Tao Q; Chang Y; Day AS; Wu J; Wang X, 2024, 'Association between serum 25-hydroxyvitamin D level and myopia in children and adolescents: a cross-sectional study', Translational Pediatrics, 13, pp. 310 - 317, http://dx.doi.org/10.21037/tp-23-617

Goodsall TM; Day AS; Andrews JM; Ruszkiewicz A; Ma C; Bryant RV, 2024, 'Composite Assessment Using Intestinal Ultrasound and Calprotectin Is Accurate in Predicting Histological Activity in Ulcerative Colitis: A Cohort Study', Inflammatory Bowel Diseases, 30, pp. 190 - 195, http://dx.doi.org/10.1093/ibd/izad043

Vernon-Roberts A; Blay L; Day AS, 2024, 'Knowledge Levels About Inflammatory Bowel Disease Vary Between Healthcare Professional Groups', Digestive Diseases and Sciences, 69, pp. 410 - 418, http://dx.doi.org/10.1007/s10620-023-08191-x

Bener A; Ozturk AE; Ustundag UV; Barisik CC; Agan AF; Day AS, 2024, 'Assessing the Impact of Serum Calcium, 25-Hydroxy Vitamin D, Ferritin, and Uric Acid Levels on Colorectal Cancer Risk', Journal of Clinical Medicine Research, 16, pp. 483 - 490, http://dx.doi.org/10.14740/JOCMR5296

Bener A; Öztürk AE; Dasdelen MF; Barisik CC; Dasdelen ZB; Agan AF; De La Rosette J; Day AS, 2024, 'Colorectal cancer and associated genetic, lifestyle, cigarette, nargileh-hookah use and alcohol consumption risk factors: a comprehensive case-control study', Oncology Reviews, 18, http://dx.doi.org/10.3389/or.2024.1449709

Shaoul R; Lightdale JR; Day AS, 2024, 'Editorial: Pediatric endoscopy and sedation—volume II', Frontiers in Pediatrics, 12, http://dx.doi.org/10.3389/fped.2024.1403090

Vernon-Roberts A; Premaratne M; Wright R; Keenan JI; Day AS, 2024, 'Profile of Helicobacter pylori infections among children in the South Island of New Zealand (2010–2021)', Helicobacter, 29, http://dx.doi.org/10.1111/hel.13037

Edwards TS; Day AS, 2024, 'The role of fecal biomarkers in individuals with inflammatory bowel disease', Expert Review of Molecular Diagnostics, 24, pp. 497 - 508, http://dx.doi.org/10.1080/14737159.2024.2375224

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