Table 3: Changes in ferritin, retinol, and folate concentrations in children before and after the intervention of nutritional education in schools from Aragua, Táchira, and Lara States, Venezuela. Classification by State of precedence.

Ferritin (μg/L)Serum retinol μg/dLSerum folate nmol/L
𝑛 Before interventionAfter interventionBefore interventionAfter interventionBefore interventionAfter intervention

Aragua69 1 2 . 0 0 ± 1 0 . 1 7 a 2 4 . 3 3 ± 1 8 . 3 4 2 0 . 6 6 ± 6 . 7 2 a , b 1 7 . 1 7 ± 3 . 6 9 a 7 . 4 3 ± 4 . 9 9 1 0 . 3 4 ± 8 . 9 0 a , b
Táchira179 2 1 . 0 6 ± 1 2 . 8 1 b 2 3 . 6 0 ± 1 6 . 4 8 2 3 . 7 2 ± 5 . 9 5 b 2 2 . 4 5 ± 5 . 8 8 b 1 2 . 9 9 ± 7 . 2 4 1 2 . 1 6 ± 9 . 2 9 b
Lara179 1 6 . 5 2 ± 1 0 . 6 2 a , b 2 0 . 8 8 ± 1 3 . 9 0 2 0 . 5 0 ± 6 . 9 1 a 2 0 . 4 8 ± 5 . 7 4 b 1 1 . 2 1 ± 9 . 3 5 9 . 1 9 ± 8 . 0 7 a

Total427 𝟏 𝟔 . 𝟓 𝟑 ± 𝟏 𝟑 . 𝟏 𝟕 𝟐 𝟐 . 𝟗 𝟒 ± 𝟏 𝟔 . 𝟐 𝟒 𝟐 𝟏 . 𝟔 𝟔 ± 𝟔 . 𝟔 𝟒 𝟐 𝟎 . 𝟎 𝟗 ± 𝟓 . 𝟏 𝟎 𝟏 𝟎 . 𝟓 𝟒 ± 𝟕 . 𝟏 𝟗 𝟏 𝟎 . 𝟓 𝟔 ± 𝟖 . 𝟕 𝟓

*Statistically significant difference between before and after intervention ( 𝑃 < . 0 5 ).
aDifferent superscript letters, statistically different between states ( 𝑃 < . 0 5 ).