Table 5. Multiple linear regression models including ferritin or haemoglobin as dependent variables and age, gender and H. pylori (HP) infection as independent variables in children from United Kingdom (n = 81), Chile (n = 105) and Brazil (n = 125).

	United Kingdom				Chile				Brazil
	Univariateanalysis		Multivariateanalysis		Univariateanalysis		Multivariateanalysis		Univariateanalysis		Multivariateanalysis
	Beta	P value	Beta	P value	Beta	P value	Beta	P value	Beta	P value	Beta	P value
	Coefficient		coefficient		coefficient		coefficient		coefficient		coefficient
FERRITIN
Age	−0.135	0.25	–	–	−0.046	0.64	–	–	−0.048	0.59	–	–
Gender	−0.157	0.02	–	–	−0.165	0.09	−0.169	0.08	−0.286	0.001	−0.276	0.02
HP infection	−0.043	0.71	–	–	−0.211	0.03	−0.214	0.03	−0.155	0.08	−0.197	0.05
HAEMOGLOBIN
Age	0.451	<0.001	0.46	<0.001	0.187	0.06	0.294	0.005	0.280	0.002	0.304	0.001
Gender	−0.161	0.17	−0.199	0.07	−0.127	0.19	−0.248	0.01	−0.151	0.09	−0.140	0.10
HP infection	0.216	0.06	0.069	0.53	−0.182	0.06	−0.197	0.03	−0.164	0.09	−0.149	0.09