Figure 4.

Association between dietary iron intakes and adjusted IBDQ scores for UC patients with quiescent (closed triangles and full black line, n = 42) and relapsed (open triangles and dashed black line, n = 6) disease activity. IBDQ scores are predicted values adjusted for age and gender (entered as covariates in the linear regression model). Dietary iron is expressed as iron density values. p = 0.0001 for the comparison of the slopes for the respective linear associations using analysis of covariance (ANCOVA).

Tolkien et al. Nutrition Journal 2013 12:152   doi:10.1186/1475-2891-12-152
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