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Table 3 Effects of vitamin A supplementation on intensities of STH reinfection after 3 and 6 months of the interventions among Aboriginal schoolchildren *

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

Infection/Group Baseline After 3 months After 6 months P
Ascaris     n.s.
Vitamin A 19,869 (9,744) 896 (263)a,1 14,867 (5,246)
Placebo 16,072 (8,151) 1,339 (519)a,1 13,368 (6,367)
Total 17,978 (8,473) 1,112 (411)a,1 14,113 (5,415)
Trichuris     n.s.
Vitamin A 5,474 (2,031) 439 (190)a,1 2,859 (799)a,2
Placebo 5,624 (3,449) 722 (240)a,1 3,678 (562)a,2
Total 5,548 (3,230) 579 (212)a,1 3,270 (622)a,2
Hookworm     n.s.
Vitamin A 59 (20) 9 (8)a,1 14 (11)a,2
Placebo 57 (19) 6 (7)a,1 11 (8)a,2
Total 58 (17) 7 (4)a,1 12 (5)a,2
  1. *All values are arithmetic mean counts of egg per gram faeces (SD).
  2. aSignificant difference from baseline (Wilcoxon signed-rank test): 1(P < .001), 2(P < .01).
  3. PP-values for the differences between vitamin A and placebo groups (Mann Whitney U test; not significant).