Figure 3.

Association between dietary iron intakes and quality of life measured with McMaster IBDQ for UC patients with quiescent (closed triangles and full black line, n = 42) or relapsed (open triangles and dashed black line, n = 6) disease activity. A, total dietary iron; B, haem iron; C, non-haem iron and D, fortificant iron. p = 0.029 (for total dietary iron, panel A) for the comparison of the slopes for the respective linear associations using analysis of covariance (ANCOVA). For relapsing patients, further analysis was not considered appropriate for the sub-fractions of dietary iron given the very small study numbers.

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