Dominica Gidrewicz’s research while affiliated with University of Calgary and other places

Objectives Celiac disease (CD) is an autoimmune gastrointestinal disorder that requires a strict lifelong gluten‐free diet (GFD). Gluten‐free (GF) foods are more expensive and less readily accessible than gluten‐containing foods, contributing to an increased risk for food insecurity (FI). The study aimed to determine associations between GF‐FI, sociodemographic risk factors and child dietary adherence and diet quality (DQ). Methods A 26‐item, cross‐country online survey was administered through social media to parents of children with CD on the GFD. The survey elicited household and CD child sociodemographic and clinical characteristics (e.g., duration of CD), measures of household FI, child DQ and GFD adherence, and parents' concerns related to GF food. Household GF‐FI was evaluated using the validated Hunger Vital Sign™ and the US Department of Agriculture Six‐Item Short Form Household Food Security Survey Module. Results GF‐FI occurred in 47% of households with children with CD with >30% reporting low to very low food security. Sociodemographic risk factors identified included lower income, renters, rural residency, single‐parental households, and having children with additional dietary restrictions ( p < 0.001). Regardless of FI status, a majority of households reported experiencing significantly higher GF food expenditure. GF‐FI was associated with reduced adherence to the GFD, increased consumption of processed GF food, and lower intakes of fresh fruits and vegetables and GF grains among children with CD ( p < 0.05). Conclusions GF‐FI is prevalent in this multiethnic cohort of households with CD children and is associated with worsening DQ and GFD adherence. Policy interventions are urgently needed to address GF‐FI.

Background Prior surveys of Canadians with celiac disease (CD) have demonstrated several challenges on the path to diagnosis. It has been over a decade since findings from the most recent survey were published. Aims To compare the experiences of Canadian individuals prior to CD diagnosis across time. Methods The State of Celiac Disease in Canada Survey is an online, nationwide survey distributed by Celiac Canada in December 2022. Over 75 questions were included, covering diagnostic pathways, presenting symptoms, and involvement of health care professionals (HCPs). Analysis was restricted to those who responded to having CD, dermatitis herpetiformis, or gluten ataxia, as well as provided the time since their diagnosis. Results A total of 6052 participants were included: 1210 (20.0%) were diagnosed in the last two years, 1113 (18.4%) two to five years ago, 1136 (18.8%) five to 10 years ago, 1040 (17.2%) 10 to 15 years ago, 960 (15.9%) 15 to 25 years ago, and 593 (9.8%) more than 25 years ago. Diarrhea was reported in over 70% of respondents diagnosed over 25 years ago, compared to approximately 50% diagnosed in the last five years (Figure 1A). Conversely, 31% of individuals diagnosed over 25 years ago experienced brain fog compared to 57% of those diagnosed in the last two years. Approximately 25% of respondents diagnosed at least 15 years ago experienced symptoms for more than 20 years prior, compared to 15% of those diagnosed in the last two years (Table 1). There were no clear differences in the proportion of respondents who saw a family physician before diagnosis, but there was a drop in those consulting a gastroenterologist (60% diagnosed more than 25 years ago versus 43% diagnosed in the last five years, Figure 1B). Conclusions Over time, there has been a shift in the clinical presentation of celiac disease, which may reflect improved detection of cases without gastrointestinal symptoms. Delays in diagnosis remain a concern but have also improved over time. The phenomenon of fewer patients consulting with gastroenterologists requires further investigation to understand the cause and impact on accurate diagnosis. Delays in diagnosis across time since diagnosis Note: 496 respondents did not report time from symptoms to diagnosis Symptoms experienced (A) and healthcare professionals consulted (B) prior to diagnosis Funding Agencies Celiac Canada (FKA Canadian Celiac Association)

Background The COVID-19 pandemic affected various healthcare services, including primary care and management of certain health conditions. There is limited data on how the pandemic impacted those with celiac disease (CD). Aims Explore the implications of the COVID-19 pandemic on CD diagnosis and management. Methods The State of Celiac Disease in Canada Survey was made available online by Celiac Canada in December 2022. Over 75 questions were included, covering diagnostic pathways, COVID-19 factors such as infection and vaccination, perceptions around COVID-19, and gluten-free food access during the pandemic. Analysis was restricted to those who responded to having CD, dermatitis herpetiformis, or gluten ataxia. Results A total of 6052 participants were included. A total of 2320 (38.3%) reported having tested positive for COVID-19 at some time during the pandemic. Among those with an infection at some point, 93.8% tested positive after already being diagnosed with CD. Just under 2% of those testing positive for COVID-19 required hospitalization, of which 10% were admitted to the intensive care unit. Vaccination against COVID-19 was reported by 4695 (77.6%) individuals, although 1157 (19.1%) did not provide a response to this specific question. This did not differ significantly by gender (p = 0.901), although it did across age groups (p ampersand:003C 0.001), with a mean age of 54.2 years who were vaccinated compared to a mean age of 45.7 years who were not vaccinated. 718 (11.9%) of individuals felt they were at higher risk of COVID-19 complications due to having CD; however, 1290 did not respond. Reported delays from symptoms to diagnosis did not increase among those diagnosed during the pandemic compared to those diagnosed before. Most respondents did not feel the pandemic made it more challenging to follow the gluten-free diet, and just over half (52.8%) did not feel it was harder to obtain or access gluten-free food during this time. However, almost three-quarters (73.4%) noted an increase in the cost of gluten-free food during the pandemic – this meant adjusting finances in other areas to afford gluten-free food (28.5%), changing the type of food purchased (19.3%), or accessing a food bank (0.7%). Conclusions A significant number of patients with CD reported COVID-19 infections, but less than 2% had serious outcomes. This survey identified gaps in our understanding of COVID-19 vaccination in patients with CD and highlighted some adverse impacts of the pandemic on the costs of gluten-free foods. Funding Agencies Celiac Canada (FKA Canadian Celiac Association)

Background Adolescents with celiac disease (CD) are at risk for non-adherence to the gluten-free diet (GFD). Knowledge of the GFD may impact adherence. Objectives To examine the relationship between knowledge and adherence to the GFD in a local population of adolescents with CD. Secondary objectives were to identify information sources used to learn about the GFD and to compare adolescent and parent knowledge of the GFD. Design/Methods Adolescents (12-17 years) with CD and their parents from local paediatric gastroenterology clinics completed an online survey containing a knowledge assessment (Gluten-Free Diet Quiz [GFD-Q]), validated adherence scale, GFD information sources, and demographic/clinical information. GFD-Q scores were categorized as “sufficient knowledge” based on correctly identifying: 3/3 gluten-containing foods, at least 4/7 gluten-free foods, and at least 4/7 foods that may contain gluten. Otherwise, scores were termed as indicating “insufficient knowledge”. Results Of 40 adolescents, 15/40 (37%) had sufficient knowledge and 25/40 (63%) had insufficient knowledge. Within the insufficient knowledge group, 14/25 (56%) did not correctly identify enough allowed, gluten-free foods. Parents scored higher on the GFD-Q (67% with sufficient knowledge). Adolescents reported overall adherence to the GFD (88%), with adherence similar between sufficient and insufficient knowledge groups (80% vs. 92%). Most helpful information sources include physicians, another person with CD, parent(s), and Google (online search engine). Apps were infrequently used (20% of adolescents). Conclusion Adolescents report good adherence, but struggle with knowledge of the GFD, particularly in identifying gluten-free foods. Further research is required to explore GFD educational tools, including mobile apps and dietician-led teaching sessions.

Objectives: This study examined the relationship between knowledge of, and adherence to, the gluten-free diet (GFD) in a local population of adolescents with celiac disease (CD). The secondary objectives were to identify information sources used to learn about the GFD and to compare adolescents' and parents' knowledge of the GFD. Methods: Adolescents (12-17 years) with CD and their parents from pediatric gastroenterology clinics in Calgary, Alberta, completed an online survey containing a knowledge assessment (Gluten-Free Diet Quiz [GFD-Q]), an adherence scale, questions about GFD information sources, and demographic/clinical information. GFD-Q scores were deemed "sufficient knowledge" with correct identification of 3/3 gluten-containing foods, ≥4/7 gluten-free foods, and ≥ 4/7 foods that may contain gluten; otherwise, scores were termed "insufficient knowledge". Results: Of the 40 adolescent-parent pairs, 15 of 40 adolescents (37%) had sufficient knowledge, and 25 of 40 adolescents (63%) had insufficient knowledge. Within the insufficient knowledge group, 14 of 25 (56%) did not correctly identify enough allowed gluten-free foods. Parents scored higher on the GFD-Q (67% had sufficient knowledge). Adolescents reported overall adherence to the GFD (88%), with adherence being similar between the sufficient and insufficient knowledge groups (80% versus 92%). The most helpful information sources included physicians, another person with CD, parent(s), and Google; apps were infrequently used. Conclusion: Adolescents report good adherence; however, they struggle with GFD knowledge, particularly in identifying gluten-free foods. Further research is required to explore GFD educational tools, including mobile apps and dietician-led teaching sessions.

Background & Aims The incidence of biopsy-confirmed celiac disease has increased. However, few studies have explored the incidence of celiac autoimmunity based on positive serology results. Methods A population-based cohort study assessed testing of tissue transglutaminase antibodies (tTG-IgA) in Alberta from 2012 to 2020. After excluding prevalent cases, incident celiac autoimmunity was defined as the first positive tTG-IgA result between 2015 and 2020. Testing and incidence rates for celiac autoimmunity were calculated per 1000 and 100,000 person-years, respectively. Incidence rate ratios (IRRs) were calculated to identify differences by demographic and regional factors. Average annual percent changes (AAPCs) assessed trends over time. Results The testing rate of tTG-IgA was 20.2 per 1000 person-years and remained stable from 2012 to 2020 (AAPC, 1.2%; 95% confidence interval [CI], –0.5 to 2.9). Testing was higher in female patients (IRR, 1.66; 95% CI, 1.65–1.66), those living in metropolitan areas (IRR, 1.39; 95% CI, 1.38–1.40), and in areas of lower socioeconomic deprivation (lowest compared to highest IRR, 1.24; 95% CI, 1.23–1.25). Incidence of celiac autoimmunity was 33.8 per 100,000 person-years and increased from 2015 to 2020 (AAPC, 6.2%; 95% CI, 3.1–9.5). Among those with tTG-IgA results ≥10 times the upper limit of normal, the incidence was 12.9 per 100,000 person-years. The incidence of celiac autoimmunity was higher in metropolitan settings (IRR, 1.28; 95% CI, 1.21–1.35) and in the least socioeconomically deprived areas compared to the highest (IRR, 1.22; 95% CI, 1.14–1.32). Conclusions Incidence of celiac autoimmunity is high and increasing, despite stable testing rates. Variation in testing patterns may lead to underreporting the incidence of celiac autoimmunity in nonmetropolitan areas and more socioeconomically deprived neighborhoods.

Background There is controversy over the recommendations for specific serological strategies implemented and the need for a biopsy to confirm celiac disease (CeD). We reviewed and appraised the current clinical practice guidelines (CPGs) to assess the quality and reliability of recommendations for CeD diagnosis in pediatric and adult populations. Methods We searched databases, including MEDLINE, EMBASE, Web of Science, and CINAHL, between December 2010 and January 2021 for CPGs. Four independent reviewers extracted data. Appraisal of Guidelines Research and Evaluation (AGREE II) criteria were applied by two reviewers, and a standardized score was calculated for each of the six domains. A cut-off of 60% was used to identify high-quality guidelines. Results A total of 654 records were identified, 10 of which were eligible for data extraction. Both adult and pediatric CPGs averaged above 70% for the domains of ‘scope and purpose’ and ‘clarity and presentation’. For ‘stakeholder involvement’, the mean adult and pediatric CPG scores were below the cut-off. Only one adult-focused guideline exceeded the cut-off for the ‘rigour of development’ domain. ‘Applicability’ scores were most alarming, with adult CPGs averaging 21% and pediatric CPGs averaging 23%. Conclusion Our review and appraisal of the CPGs for the diagnosis of CeD highlight significant discrepancies in clinical recommendations and some concerns regarding methodological rigour, particularly in stakeholder engagement, rigour, and applicability. Creating a Canadian guideline of high methodological quality that overcomes these weaknesses is critical to optimize patient care and ensuring accurate diagnoses in CeD.