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Table 1 Baseline characteristics of the 591 children from Flores island, Indonesia

From: Effect of a short course of iron polymaltose on acquisition of malarial parasitaemia in anaemic Indonesian schoolchildren: a randomized trial

Variablea IPM group Placebo group
Number 294 297
Gender, male, n (%) 225 (77) 224 (75)
Age, years, mean ± SD 10.2 ± 2.8 10.5 ± 3.0
 Baseline age 5–11, n (%) 206 (70) 190 (64)
 Baseline age 12–15, n (%) 59 (20) 72 (24)
 Baseline age 16–18, n (%) 29 (10) 35 (12)
Weight, kg, mean ± SD 24.8 ± 8.1 26 ± 9.7
PCR Plasmodium, n (%) 16 (5.4) 18 (6.1)
 PCR P. falciparum, n (%) 3 (1.0) 11 (3.7)
 PCR P. vivax, n (%) 13 (4.4) 7 (2.4)
Haemoglobin concentration, g/dl, mean ± SD 12.0 ± 0.8 12.0 ± 0.9
Haematocrit, mean ± SD 37.4 ± 3.1 37.7 ± 2.5
Mean corpuscular volume (MCV), fl, mean ± SD 74.2 ± 5.5 73.7 ± 5.7
 MCV < 75 fl, n (%) 147 (52) 164 (57)
 MCV ≥ 75 fl, n (%) 147 (48) 132 (43)
Ferritin concentration, µg/l, median (IQR) 43.5 (28.3–64.8) 40.4 (26.6–64.2)
Number with ferritin < 30 µg/l, n (%) 77 (26) 82 (28)
 With MCV < 75 fl, n (%) 39 (13) 52 (18)
 With MCV ≥ 75 fl, n (%) 38 (13) 29 (10)
Number with ferritin < 12 µg/l, n (%) 18 (6) 33 (11)
 With MCV < 75 fl, n (%) 6 (2) 21 (7)
 With MCV > 75 fl, n (%) 12 (4) 11 (4)
Suspected thalassaemia, n (%)b 62 (21) 74 (25)
  1. aDifferences in distribution of baseline characteristics were analysed using the Chi square test or Student t test using log transformed data. There were no statistically significant differences between except in number of number with positive PCR Plasmodium falciparum (P = 0.03), number of children with ferritin level < 12 µg/l) (P = 0.03) and number of children with serum ferritin level < 12 µg/l and microcytosis (P = 0.03)
  2. bSuspected thalassemia was defined as Mentzer index (MI) < 13, the ratio of (MCV/RBC)
  3. IPM iron polymaltose, IQR interquartile range, PCR polymerase chain reaction