The influence of iron status and genetic polymorphisms in the HFE gene on the risk for postoperative complications after bariatric surgery: a prospective cohort study in 1,064 patients

Table 5 Comparison of iron status with complications.

COMPLICATIONS	None N = 910	Any* N = 154	Any vs. None p-value	Major* N = 47	Major vs. None p-value	Minor* N = 107	Minor vs. None p-value
Hepatic Iron Staining	152 (17%)	31 (20%)	0.30²	10 (21%)	0.41²	21 (20%)	0.42²
Serum iron (ug/dL)
Median [Q1, Q3]	61 [49, 77]	67 [54, 83]	0.008¹	69 [57, 83]	0.013¹	66 [52, 83]	0.097¹
Abnormal (% > 160)	3 (<1%)	2 (1%)	0.17²	0 (0%)	0.99²	2 (2%)	0.098²
Ferritin (ng/mL)
Median [Q1, Q3]	99 [49, 163]	105 [62, 195]	0.093¹	120 [70, 235]	0.024¹	91 [61, 184]	0.52¹
Abnormal (% > 400)	30 (4%)	5 (4%)	0.99²	4 (10%)	0.083²	1 (1%)	0.24²
Iron binding capacity (ug/dL)
Median [Q1, Q3]	316 [288, 348]	316 [284, 352]	0.91¹	313 [283, 348]	0.77¹	321 [284, 353]	0.74¹
Abnormal (% > 428)	21 (3%)	3 (2%)	0.99²	1 (3%)	0.99²	2 (2%)	0.99²
Transferrin saturation (%)
Median [Q1, Q3]	19 [15, 25]	21 [17, 27]	0.017¹	24 [19, 28]	0.011¹	21 [16, 27]	0.19¹
Abnormal (% > 55)	0 (0%)	3 (2%)	0.003²	0 (0%)	NA	3 (3%)	0.0014²

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