TABLE 1

ID, IDA, and Anemia in the 1999–2002 National Health and Nutrition Examination Survey,7 Children 12 to 35 Months of Age

Population Sampled (No.)Proportion of US Toddler Population, % (SE)aID, % (SE)IDA, % (SE)All Anemia, % (SE)
General US population (672)9.2 (1.3)2.1 (0.6)5.1 (0.8)
Above poverty line (355)b66.4 (2.9)8.9 (1.7)2.2 (0.8)c4.6 (1.1)
Below poverty line (268)b33.6 (2.9)8.6 (1.6)2.3 (1.2)c6.2 (1.3)
Enrolled in WIC (360)d44.4 (3.2)10.7 (2.1)3.1 (1.2)c6.6 (1.4)
Non-Hispanic white (196)58.0 (3.8)7.3 (1.9)2.0 (0.8)c4.6 (1.2)
Non-Hispanic black (173)14.1 (2.1)6.6 (1.8)1.6 (0.9)c8.3 (1.9)
Mexican American (231)15.0 (2.2)13.9 (3.1)0.9 (0.7)c3.2 (1.2)c
Other ethnicity (72)13.0 (2.7)15.2 (4.7)c4.4 (2.7)c5.5 (2.7)c
  • Shown are the unweighted number and weighted percentage and SEs for all children with complete data for Hb, SF, transferrin saturation, and zinc protoporphyrin. Anemia was defined as a Hb concentration of <11.0 g/dL; ID7 was defined as an abnormal value for at least 2 of 3 indicators: SF (abnormal cutoff: <10 μg/dL), zinc protoporphyrin (>1.42 μmol/L red blood cells), and transferrin saturation (<10%); and IDA was defined as anemia plus ID.

  • a Proportion of row descriptor of all children in analytic sample (N = 672).

  • b Children with income data (N = 623).

  • c Estimate is statistically unreliable. Relative SE (SE of estimate/estimate × 100) ≥ 30%.

  • d Any member of household who received benefits from WIC in the previous 12 months: children with food-security data (N = 668).