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Table 1 Baseline characteristics of the schoolchildren involved in the intervention study after randomization*

From: Does vitamin A supplementation protect schoolchildren from acquiring soil-transmitted helminthiasis? A randomized controlled trial

Characteristics Vitamin A Placebo
N 125 125
Male/Female 63/62 63/62
Age (years)a 10 (8, 11) 10 (9, 11)
Serum retinol level (μmol/L)a 1.12 (0.69, 1.47) 1.14 (0.69, 1.40)
Weight (kg)b 22.7 ± 4.5 22.6 ± 5.5
Height (cm)b 123.8 ± 7.5 122.6 ± 8.4
Paternal education level (at least 6 years)c 38 (30.4) 43 (34.4)
Maternal education level (at least 6 years)c 25 (20.0) 28 (22.4)
Low household income (<RM500)c 102 (81.6) 98 (78.4)
  1. aMedian (Interquartile range).
  2. bMean ± SD.
  3. cNumber (%).
  4. *No significant differences in the variables and characteristics between vitamin A and placebo groups.