Fig. 5 | Scientific Reports

Fig. 5

From: Impact of obesity on iron metabolism and the effect of intravenous iron supplementation in obese patients with absolute iron deficiency

Fig. 5

Erythropoietin levels among BMI, sex and correlations with iron-related and hematological biomarkers. Bars show the median and interquartile range of erythropoietin based on body mass index categories and sex (A). Heat map showing the correlations between erythropoietin levels and iron-related and hematological variables in all participants and among body mass index categories (B). Detailed correlations between erythropoietin levels and hemoglobin among body mass index categories (C). EPO, erythropoietin; Hb, hemoglobin; sTfR, soluble transferrin receptor; TfSI, transferrin saturation index; MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration; MCV, mean corpuscular volume. Differences between body mass index categories and women and men were determined using Mann–Whitney U-test. The Spearman rho correlation coefficient test was used. Only comparisons with p-value < 0.1 are indicated. Ө 0.1 > p-value ≥ 0.05; *0.01 ≤ p-value < 0.05; **0.001 ≤ p-value < 0.01; ***0.0001 ≤ p-value < 0.001; **** p-value < 0.0001.

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