TABLE 2.

Zinc and Copper Concentrations at Baseline and End of Study in Zinc-Supplemented and Placebo-Group Children

Zinc Group (n = 1210)Placebo Group (n = 1221)Difference in Means or Difference in Proportions (95% CI)
Baseline
 Plasma zinc (μg/dL; mean [SD])62.0 (14.3)62.0 (11.2)0 (−1.0 to 1.0)
  <60 (μg/dL; n [%])553 (45.8%)513 (42.0%)3.8% (−0.3% to 7.6%)
n = 478)(n = 472)
 Plasma copper (μg/dL; mean [SD])166.8 (33.3)165.2 (37.3)1.6 (−2.9 to 6.1)
End of study(n = 450)(n = 499)
 Plasma zinc (μg/dL; mean [SD])129.1 (66.3)60.8 (13.8)68.3 (62.3–74.2)
  <60 (μg/dL; n [%])21 (4.6%)256 (51.3%)−46.7% (−41.8% to −51.4%)
(n = 440)(n = 490)
 Plasma copper (μg/dL; mean [SD])140.4 (36.5)155.9 (31.6)−15.5 (−19.9 to −11.1)