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Table 4 Self-reported allopurinol use and iron profile comparison in gout patients

From: The relationship between ferritin and urate levels and risk of gout

Population/marker No allopurinol Allopurinol p (95% CI)for difference
NZ European (n) 23 66  
 Serum iron (μmol L−1) 100.44 98.65 0.77 (− 10.661; 14.258)
 Serum ferritin (ng ml− 1) 253.71 284.31 0.48 (− 115.787; 54.597)
NZ Polynesian (n) 22 74   
 Serum iron (μmol L−1) 91.21 85.08 0.26 (− 4.592; 16.816)
 Serum ferritin (ng ml−1) 373.81 494.32 0.005 (− 204.466; − 36.548)
US (n) 155 34   
 Serum ferritin (ng ml− 1) 158.57 248.21 0.02 (− 164.816; 14.451)
  1. CI confidence interval, NZ New Zealand, US United States