Sander Veldhuyzen van Zanten

Dr. Sander Veldhuyzen van Zanten


Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

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

Representative Publications

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11 August 2022 in Nutrients
Verified
Journal Article
Open access
PDF file
AKAmmar Hassanzadeh Keshteli
Ammar Hassanzadeh Keshteli
RVRosica Valcheva
Rosica Valcheva
CNCheryl Nickurak
Cheryl Nickurak
HPHeekuk Park
Heekuk Park
RMRupasri Mandal
Rupasri Mandal
LDLevinus A Dieleman
Levinus A Dieleman
A relationship between ulcerative colitis (UC) and diet has been shown in epidemiological and experimental studies. In a 6-month, open-label, randomized, placebo-controlled trial, adult UC patients in clinical remission were randomized to either an “Anti-inflammatory Diet (AID)” or “Canada’s Food Guide (CFG)”. Menu plans in the AID were designed to increase the dietary intake of dietary fiber, probiotics, antioxidants, and omega-3 fatty acids and to decrease the intake of red meat, processed meat, and added sugar. Stool was collected for fecal calprotectin (FCP) and microbial analysis. Metabolomic analysis was performed on urine, serum, and stool samples at the baseline and study endpoint. In this study, 53 patients were randomized. Five (19.2%) patients in the AID and 8 (29.6%) patients in the CFG experienced a clinical relapse. The subclinical response to the intervention (defined as FCP < 150 µg/g at the endpoint) was significantly higher in the AID group (69.2 vs. 37.0%, p = 0.02). The patients in the AID group had an increased intake of zinc, phosphorus, selenium, yogurt, and seafood versus the control group. Adherence to the AID was associated with significant changes in the metabolome, with decreased fecal acetone and xanthine levels along with increased fecal taurine and urinary carnosine and p-hydroxybenzoic acid levels. The AID subjects also had increases in fecal Bifidobacteriaceae, Lachnospiraceae, and Ruminococcaceae. In this study, we found thatdietary modifications involving the increased intake of anti-inflammatory foods combined with a decreased intake of pro-inflammatory foods were associated with metabolic and microbial changes in UC patients in clinical remission and were effective in preventing subclinical inflammation.

1 April 2010 in Clinical Gastroenterology and Hepatology
Verified
Journal Article
Closed access
MLMorgan Langille
Morgan Langille
ABAndré Bernard
André Bernard
CRChris Rodgers
Chris Rodgers
SHStephanie Hughes
Stephanie Hughes
DLDes Leddin
Des Leddin
SZSander Veldhuyzen van Zanten
Sander Veldhuyzen van Zanten

7 April 2017 in Journal of Medical Internet Research
Verified
Journal Article
Open access
DKDawn Kingston
Dawn Kingston
MAMarie-Paule Austin
Marie-Paule Austin
SZSander Veldhuyzen van Zanten
Sander Veldhuyzen van Zanten
PHPaula Harvalik
Paula Harvalik
RGRebecca Giallo
Rebecca Giallo
ABAnne Biringer
Anne Biringer
Journal of Medical Internet Research - International Scientific Journal for Medical Research, Information and Communication on the Internet

6 March 2014 in Trials
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Journal Article
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DKDawn Kingston
Dawn Kingston
MAMarie-Paule Austin
Marie-Paule Austin
KHKathy Hegadoren
Kathy Hegadoren
SMSheila McDonald
Sheila McDonald
GLGerri Lasiuk
Gerri Lasiuk
SZSander Veldhuyzen van Zanten
Sander Veldhuyzen van Zanten
Stress, depression, and anxiety affect 15 to 25% of pregnant women. However, fewer than 20% of prenatal care providers assess and treat mental health problems and fewer than 20% of pregnant women seek mental healthcare. For those who seek treatment, the lack of health system integration and existing barriers frequently prevent treatment access. Without treatment, poor prenatal mental health can persist for years and impact future maternal, child, and family well-being. The purpose of this randomized controlled trial is to evaluate the effectiveness of an integrated process of online psychosocial assessment, referral, and cognitive behavior therapy (CBT) for pregnant women compared to usual prenatal care (no formal screening or specialized care). The primary outcome is self-reported prenatal depression, anxiety, and stress symptoms at 6 to 8 weeks postrandomization. Secondary outcomes are postpartum depression, anxiety, and stress symptoms; self-efficacy; mastery; self-esteem; sleep; relationship quality; coping; resilience; Apgar score; gestational age; birth weight; maternal-infant attachment; infant behavior and development; parenting stress/competence; and intervention cost-effectiveness, efficiency, feasibility, and acceptability. Pregnant women are eligible if they: 1) are <28 weeks gestation; 2) speak/read English; 3) are willing to complete email questionnaires; 4) have no, low, or moderate psychosocial risk on screening at recruitment; and 5) are eligible for CBT. A sample of 816 women will be recruited from large, urban primary care clinics and allocation is by computer-generated randomization. Women in the intervention group will complete an online psychosocial assessment, and those with mild or moderate depression, anxiety, or stress symptoms then complete six interactive cognitive behavior therapy modules. All women will complete email questionnaires at 6 to 8 weeks postrandomization and at 3, 6, and 12 months postpartum. Clinic-based providers and researchers conducting chart abstraction and analysis are blinded. Qualitative interviews with 8 to 10 healthcare providers and 15 to 30 intervention group women will provide data on feasibility and acceptability of the intervention. Results of this trial will determine the feasibility and effectiveness of an integrated approach to prenatal mental healthcare and the use of highly accessible computer-based psychosocial assessment and CBT on maternal, infant, and family-based outcomes. ClinicalTrials.gov Identifier: NCT01901796

12 February 2007 in Alimentary Pharmacology & Therapeutics
Verified
Journal Article
Open access
PDF file
SZSander Veldhuyzen van Zanten
Sander Veldhuyzen van Zanten
David ArmstrongDavid Armstrong
David Armstrong
ABA. Barkun
A. Barkun
OJO. Junghard
O. Junghard
RWR. J. White
R. J. White
IWI. K. Wiklund
I. K. Wiklund
Summary: Background The reflux disease questionnaire (RDQ) is a short, patient‐completed instrument.Aims To investigate the psychometric characteristics of the RDQ in patients with heartburn‐predominant (HB) and non‐heartburn predominant (NHB) dyspepsia.Methods HB (n = 388) and NHB (n = 733) patients were randomized to esomeprazole 40 mg daily or twice daily for 1 week, followed by 3 weeks of esomeprazole 40 mg daily.Results High factor loadings (0.78–0.86) supported the ‘regurgitation’ dimension of the RDQ. Overlapping factor loadings in the ‘heartburn’ and ‘dyspepsia’ dimensions suggested symptom overlap. All dimensions demonstrated high internal consistency (Cronbach’s alpha: 0.79–0.90). Intra‐class correlation coefficients over 4 weeks were good (0.66–0.85). The RDQ showed good responsiveness over 4 weeks of treatment, with high effect sizes (≥0.80). Moderate or large symptom improvements were reported by 90% and 77% of HB and NHB patients, respectively, following treatment. Patients who responded to acid suppression also experienced symptom benefits in all RDQ dimensions.Conclusions The RDQ is reliable, valid and responsive to change in HB and NHB patients. The symptom overlap is important but need not play a major role in determining treatment strategy as both patient groups benefited from proton pump inhibitor treatment.

14 October 2015 in BMC Gastroenterology
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Journal Article
Open access
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SQSamuel Quan
Samuel Quan
HYHong Yang
Hong Yang
DTDivine Tanyingoh
Divine Tanyingoh
PVPaul Villeneuve
Paul Villeneuve
DSDavid Stieb
David Stieb
GKGilaad Kaplan
Gilaad Kaplan
Recent studies have demonstrated an association between short-term elevations in air pollution and an increased risk of exacerbating gastrointestinal disease. The objective of the study was to evaluate if day-to-day increases in air pollution concentrations were positively associated with upper gastrointestinal bleeding (UGIB) secondary to peptic ulcer disease (PUD). A time-stratified case-crossover study design was used. Adults presenting to hospitals with their first UGIB secondary to PUD from 2004–2010 were identified using administrative databases from Calgary (n = 1374; discovery cohort) and Edmonton (n = 1159; replication cohort). Daily concentrations of ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, and particulate matter (PM10 and PM2.5) were estimated in these two cities. Conditional logistic regression models were employed, adjusting for temperature and humidity. Odds ratios (OR) with 95 % confidence intervals (CI) were expressed relative to an interquartile range increase in the concentration of each pollutant. No statistically significant associations were observed for any of the individual pollutants based on same-day, or 1-day lag effects within the Calgary discovery cohort. When the air pollution exposures were assessed as 3-, 5-, and 7-day averages, some pollutants were inversely associated with UGIB in the discovery cohort; for example, 5-day averages of nitrogen dioxide (OR = 0.68; 95 % CI: 0.53–0.88), and particulate matter <2.5 μm (OR = 0.75; 95 % CI: 0.61–0.90). However, these findings could not be reproduced in the replication cohort. Our findings suggest that short-term elevations in the level of ambient air pollutants does not increase the incidence of UGIB secondary to PUD.