Fig 1.
Age distribution of patients with Crohn’s disease and ulcerative colitis across 10-year age groups.
a. Age distribution across 10-year age groups for patients with Crohn’s disease (CD). b. Age distribution across 10-year age groups for patients with ulcerative colitis.
Fig 2.
Age distribution by Montreal classification for Crohn’s disease and ulcerative colitis.
a. Age distribution by Montreal classification in Crohn’s disease (CD). b. Age distribution by Montreal classification in ulcerative colitis (UC).
Fig 3.
Evolution of mean ages of patients with CD and UC during the 20 year study-period.
Solid lines represent the annual mean age for each disease group (red for CD and blue for UC). Dotted lines represent the fitted linear trend lines for each disease type, illustrating changes over time.
Fig 4.
Location distribution across age groups for ulcerative colitis by sex.
a. Location distribution across age groups in males with UC. b. Location distribution across age groups in females with UC.
Fig 5.
Location distribution across age groups for Crohn’s disease by sex.
a. Location distribution across age groups in males with CD. b. Location distribution across age groups in females with CD.
Fig 6.
Annual incidence of IBD in Lebanon from 2000 to 2020.
Blue points represent the observed annual number of new IBD cases, and the orange line represents the fitted Poisson regression model using u = year as a continuous predictor.
Fig 7.
Annual incidence of inflammatory bowel disease (IBD) in Lebanon from 2000 to 2020.
The observed yearly counts are shown as points. The solid curve represents the fitted quasi-Poisson regression model using year as a continuous predictor, and the shaded area indicates the corresponding 95% confidence interval. Based on this model, the estimated Annual Percentage Change (APC) in IBD incidence was 7.1% per year (95% CI: 4.7-9.7).
Table 1.
Incidence Rate Ratios (IRRs) for IBD incidence, Lebanon 2000-2025.
Fig 8.
Forest plot of incidence rate ratios (IRRs) with 95% confidence intervals for sex, age groups, disease type, and calendar periods, Lebanon 2000-2025.
The vertical dashed line incidicates the null value (IIR = 1).