. Author manuscript; available in PMC: 2006 Feb 7.

Published in final edited form as: Br J Nutr. 2005 Dec;94(6):969–975. doi: 10.1079/bjn20051586

Table 3.

Effect of interaction between Helicobacter pylori infection and treatment with Fe supplements on Hb, haematocrit and serum ferritin after 8 weeks of treatment for all children in the trial (Values are mean effect with 95 % CI in parentheses)

	Effect on
Variable^*	Hb (g/l)	Haematocrit (%)	Ferritin (μg/l)^†
Interaction (between treatment and H. pylori)^‡	-4·50 (2·15, -11·15)	-1·20 (0·73, -3·13)	1·67 (1·02, 2·75)
P value	0·18	0·22	0·04

Separate multiple linear regression models were fitted for Hb, haematocrit and ferritin values after 8 weeks of supplementation (dependent variables) on all children in the trial. Other variables in the models are treatment with Fe, H. pylori status, sex, age and admission values of Hb or haematocrit or ferritin (log-transformed).

^†

Ferritin was modelled after log transformation and therefore the effect and confidence interval are in ratio mode.

^‡

H. pylori: present= 1, absent = 0; treatment with Fe: yes = 1, no = 0.