Background: The association between beverage intake and ulcerative colitis (UC) is not well-established, with no available data from Arab countries. Herein, we investigated the potential association of consuming coffee, tea, and carbonated soft drinks with UC among a population from Saudi Arabia. Methods: This hospital-based case-control study used data of 171 newly diagnosed UC patients and 400 patients with other gastrointestinal conditions who served as controls. All UC cases were ascertained by endoscopy, while beverage intake was assessed by a questionnaire that was completed before diagnosis. We computed odds ratios (ORs) and 95% confidence intervals (95% CIs) of UC and UC extension for frequent versus infrequent intakes of coffee, tea, and carbonated soft drinks using logistic regression. Results: Overall, 23.4% of UC patients had pancolitis, 21.1% extensive, 51.4% left-sided, and 4.1% proctitis. UC patients had a similar sex distribution to the controls but were older and had a lower BMI. After adjustment for age, sex, body mass index, and smoking history, frequent intakes of coffee and tea were associated with lower odds of UC: 0.62 (0.42, 0.91) and 0.53 (0.35, 0.79), respectively. On the other hand, frequent intakes of carbonated soft drinks were associated with increased odds of UC: 9.82 (6.12, 15.76). The frequency of beverage consumption was not associated with UC extension. Conclusion: UC was negatively associated with frequent coffee and tea consumption but positively associated with frequent carbonated soft drink intake in Saudi people. More population-based prospective cohort studies are needed to confirm our findings.

Background: Inflammatory bowel disease (IBD), which includes ulcerative colitis (UC) and Crohn’s disease (CD), is a complex disease with increasing global incidence and prevalence. Although dairy consumption has been linked to various chronic diseases, its relationship with IBD remains uncertain. Additionally, there is a lack of data on this topic from Arab countries. This study aimed to investigate the association between dairy consumption and IBD through a case–control study among Arab populations, followed by a meta-analysis of available studies. Method: First, we used data from 158 UC patients, 244 CD patients, and 395 controls attending a polyclinic in Riyadh, Saudi Arabia. All participants were aged ≥ 18 years. Logistic regression was used to calculate the odds ratios (ORs) and 95% confidence intervals (95% CIs) of UC and CD for individuals who reported the highest versus the lowest frequencies of dairy consumption. Next, we conducted a meta-analysis, combining our results with those from other eligible studies after searching several databases. We used the I² statistics to examine statistical heterogeneity across studies and the regression test for funnel plot asymmetry to assess publication bias. Results: The case–control study showed a negative association between frequent dairy consumption and UC (OR (95% CI) = 0.64 (0.41, 1.00)) but not CD (OR (95% CI) = 0.97 (0.65, 1.45)). In the meta-analysis, the highest frequencies of dairy consumption were negatively associated with both UC and CD: ORs (95% CIs) = 0.82 (0.68, 0.98) and 0.72 (0.59, 0.87), respectively. A moderate heterogeneity across studies was noticed in the UC meta-analysis (I² = 59.58%) and the CD meta-analysis (I² = 41.16%). No publication bias was detected. Conclusions: Frequent dairy consumption could protect against the development of UC and CD, suggesting potential dietary recommendations in the context of IBD prevention.

Background: Inflammatory bowel diseases (IBD), including ulcerative colitis (UC) and Crohn’s disease (CD), are chronic conditions with complex etiologies that may involve dietary factors. This study investigates the association between fruit and vegetable consumption and the risk of UC and CD, focusing on gender-specific differences. Methods: A hospital-based case–control study, comprising 158 UC patients (93 men and 65 women), 245 CD patients (167 men and 78 women), and 395 controls without IBD (256 men and 139 women), was conducted in Riyadh, Saudi Arabia. Fruit and vegetable consumption data were gathered through a self-administered questionnaire distributed before diagnosis. Logistic regression analysis was applied to estimate the odds ratios (ORs) and 95% confidence intervals (95% CIs) for UC and CD among the participants reporting the daily consumption of fruits and vegetables. Results: Among men, daily vegetable consumption was associated with higher odds of UC in the age-adjusted model [OR (95% CI): 1.78 (1.02, 3.10)], but this association became non-significant after further adjustment for body mass index, smoking, anemia, and elevated liver enzymes [OR (95% CI): 1.70 (0.91, 3.18)]. No significant associations were observed between vegetable consumption and CD. In contrast, the women who consumed vegetables every day had a non-significant inverse association with UC and a significant inverse association with CD in both the age-adjusted and multivariable-adjusted models [ORs (95% CIs): 0.44 (0.23, 0.87) and 0.41 (0.20, 0.84), respectively]. Fruit consumption was neither associated with UC nor CD in either sex. Conclusions: Daily vegetable consumption was significantly associated with decreased odds of CD among women, but not men, highlighting potential sex-specific dietary influences on IBD risk.

Background: Inflammatory bowel diseases (IBD), including ulcerative colitis (UC) and Crohn’s disease (CD), are chronic conditions influenced by various factors, including diet. This study examined the association between fast food consumption and IBD risk through a case-control study and a meta-analysis of epidemiological evidence. Methods: We analyzed data from a hospital-based case-control study conducted in Riyadh. The study included 158 UC patients, 244 CD patients, and 395 controls without IBD. Fast food consumption was assessed using a self-administered questionnaire distributed before diagnoses were made. We used logistic regression to calculate odds ratios (ORs) and 95% confidence intervals (95% CIs) of UC and CD for individuals who reported daily fast food consumption. Then, we merged our results with those from other studies investigating the same association into a meta-analysis. Results: In the case-control study, daily consumption of fast food was strongly associated with UC and CD among Saudi people: age- and sex-adjusted ORs (95% CIs) = 6.29 (3.89, 10.16) and 5.92 (3.98, 8.80), respectively. The associations remained robust after further adjustments: ORs (95% CIs) = 6.61 (3.93, 11.12) and 5.90 (3.89, 8.94), respectively. Similarly, the meta-analysis revealed higher odds of fast food intake associated with UC and CD, with pooled odds ratios (95% CIs) of 2.41 (1.07, 5.45) and 2.65 (1.23, 5.70), respectively. Conclusions: Our findings highlight the potential role of fast food consumption in the development of IBD. From a preventive medicine perspective, fast food consumption should be discouraged to reduce the risk of IBD.

Background and Objectives: Diet is a potential modifiable risk factor for ulcerative colitis (UC). This study examined the associations of individual dietary components and combined dietary profiles with UC. Methods and Study Design: This case–control study included 157 patients with UC and 395 controls. Dietary consumption frequencies were converted into ordinal scores ranging from 1 to 4. Participants were additionally classified into four dietary profiles based on combined levels of risk-promoting and protective food consumption. Logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs). Results: Higher consumption of fast food (OR = 5.30, 95% CI: 3.65, 7.70), carbonated soft drinks (OR = 9.37, 95% CI: 5.78, 15.18), and spicy food (OR = 1.56, 95% CI: 1.21, 2.01) was positively associated with UC. Dairy consumption was inversely associated with UC (OR = 0.52, 95% CI: 0.33, 0.82). In sex-stratified analyses, vegetable consumption was inversely associated with UC among women only. Compared with participants with high risk-promoting/low protective food consumption, those with low risk-promoting/low protective food consumption (OR = 0.07, 95% CI: 0.02, 0.21) and those with low risk-promoting/high protective food consumption (OR = 0.08, 95% CI: 0.03, 0.17) had substantially lower odds of UC. The high risk-promoting/high protective food consumption was not associated with UC. Conclusions: Frequent consumption of fast food, carbonated soft drinks, and spicy food was associated with higher odds of UC, whereas dairy consumption was associated with lower odds. Lower consumption of risk-promoting foods, irrespective of protective food consumption, was associated with substantially lower odds of UC. Prospective studies are needed to confirm these associations.