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Table 5 Comparison of iron status with complications.

From: 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

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
  1. *Complications were limited to those occurring within 30-days of discharge.
  2. 1Wilcoxon rank-sum test; 2Fisher's exact test