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 8 Comparison of iron status with length of stay.

Length of stay	<4 days N = 947	4+ days N = 117	p-value
Hepatic Iron Staining	159 (17%)	24 (21%)	0.30²
Serum iron (ug/dL)*
Median [Q1, Q3]	61 [49, 77]	63 [52, 83]	0.062¹
Abnormal (% > 160)	5 (<1%)	0 (0%)	0.99²
Ferritin (ng/mL)*
Median [Q1, Q3]	94 [49, 163]	118 [68, 195]	0.0093¹
Abnormal (% > 400)	33 (4%)	2 (2%)	0.42²
Iron binding capacity (ug/dL)*
Median [Q1, Q3]	316 [287, 348]	313 [290, 352]	0.68¹
Abnormal (% > 428)	22 (3%)	2 (2%)	0.99²
Transferrin saturation (%)*
Median [Q1, Q3]	19 [15, 25]	22 [17, 27]	0.026¹
Abnormal (% > 55)	3 (<1%)	0 (0%)	0.99²

*Serum iron, ferritin, iron binding capacity, and transferring saturation were available for n = 894, n = 900, n = 895, and n = 891 subjects, respectively.
¹Wilcoxon rank-sum test; ²Fisher's exact test

ISSN: 1754-9493