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Table 3 Total and bioavailable iron intake and bioavailability in preschool children from 12 to 59 moa,b

From: Sociodemographic factors associated with low intake of bioavailable iron in preschoolers: National Health and Nutrition Survey 2012, Mexico

 12–59 mo
(n = 1012)
12–23 mo
(n = 151)
24–59 mo
(n = 861)
Mean ± SD (p50)Mean ± SD (p50)Mean ± SD (p50)
Total Iron (mg/d)9.22 ± 6.77 (7.78)7.48 ± 6.31 (6.62)9.47 ± 6.77 (7.91)
Non-heme Iron (mg/d)8.98 ± 6.72 (7.57)7.32 ± 6.30 (6.21)9.20 ± 6.72 (7.77)
Heme Iron (mg/d)0.24 ± 0.33 (0.11)0.15 ± 0.25 (0.03)0.25 ± 0.34 (0.11)
Non-heme Iron bioavailability(%)c8.33 ± 5.08 (7.01)11.21 ± 7.46 (9.70)7.92 ± 4.55 (6.75)
Total Iron bioavailability (%) d9.15 ± 5.36 (7.83)12.03 ± 7.83 (10.49)8.74 ± 4.83 (6.73)
Bioavailable non-heme Iron, (mg/d)0.68 ± 0.70 (0.51)0.77 ± 0.76 (0.52)0.67 ± 0.69 (0.51)
Bioavailable heme Iron, (mg/d)e0.06 ± 0.09 (0.02)0.04 ± 0.07 (0.01)0.06 ± 0.09 (0.03)
Total FeBio, (mg/d) f0.75 ± 0.73 (0.60)0.81 ± 0.76 (0.59)0.74 ± 0.71 (0.59)
  1. aSD: Standar Desviation; p50: median
  2. bEvery estimation was adjusted by survey design
  3. cBioavailability of non-heme iron was estimated using the Armah et al. equation [14]
  4. dTotal iron bioavailability was estimated adding non-heme iron and heme iron bioavailabilities
  5. fBioavailable total iron was estimated adding bioavailable non-heme iron and bioavailable heme iron
  6. eBioavailable heme iron was estimated using conservative values; value = 35% if serum ferritin (SF) < 12 μg/L and value = 25% if SF ≥12 μg/L.