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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Clin Gastroenterol Hepatol. 2013 Nov 20;12(7):1170–1178. doi: 10.1016/j.cgh.2013.11.017

Table 4.

Potential factors associated with iron deficiency in Black or American Indian/Alaska Native Race

Iron Deficient Iron Normal P value
Black Race
 Number 15 (75) 5 (25)
 Female sex 13 (87) 5 (100) 1.0
 Obesity 15 (100) 4 (80) 0.25
 Diabetes present 8 (53) 3 (60) 1.0
 BMI (kg/m2) 38.8 ± 6.4 34.4 ± 5.8 0.089
 Waist circumference 114 ± 17 107 ± 14 0.52
 No. of alcoholic drinks/week 0.1 ± 0.17 0 ± 0 0.21
 Dietary iron consumed (mg/day) 11.3 ± 8.5 14.1 ± 8.3 0.38
 Dietary vitamin C (mg/day) 134 ± 157 108 ± 58 0.51
 Supplemental vitamin C (mg/day) 0 ± 0 140 ± 269 0.02
American Indian or Alaska Native Race
 Number 22 (51) 21 (49)
 Female sex 16 (73) 12 (57) 0.35
 Obesity 19 (86) 12 (57) 0.045
 Diabetes present 8 (36) 4 (19) 0.31
 BMI (kg/m2) 36.6 ± 4.3 32.3 ± 6.0 0.009
 Waist circumference 113 ± 13 103 ± 12 0.016
 No. of alcoholic drinks/week 0.14 ± 0.18 0.63 ± 1.9 0.98
 Dietary iron consumed (mg/day) 13.0 ± 6.2 15.4 ± 6.3 0.24
 Dietary vitamin C (mg/day) 130 ± 153 117 ± 60 0.65
 Supplemental vitamin C (mg/day) 118 ± 263 65 ± 154 0.38

Values are N (%) or mean ± SD

P values from Fisher’s exact test for categorical variables or Wilcoxon rank sum test for continuous variables.