Table 3

Multiple regression analysis of local height-for-age Z score against previous height, time of birth (seasonal factors x₁and x₂), H pylori colonisation, and diarrhoeal disease for children aged <1 year

Dependent variable	Variable	Regression coefficient	SE coefficient	t ratio	p value
Height-for-age Z score at 6 months	Height-for-age Z score at 3 months	0.0.758	0.092	4.29	<0.001
	Seasonal factor x₁	−0.143	0.091	−1.58	0.118
	Seasonal factor x₂	0.146	0.087	1.68	0.097
	H pylori at 6 months	−0.281	0.13	−2.17	0.033
(R² = 67.2)	Diarrhoea 3–6 months	0.025	0.4011	0.06	0.951

Height-for-age Z score at 9 months	Height-for-age Z score at 6 months	0.844	0.06	14.0	<0.001
	Seasonal factor x₁	0.157	0.084	1.87	0.065
	Seasonal factor x₂	0.006	0.085	0.07	0.945
	H pylori at 9 months	−0.128	0.12	−1.07	0.29
(R² = 67.7%)	Diarrhoea 6–9 months	−0.524	0.464	−1.13	0.262

Height-for-age Z score at 12 months	Height-for-age Z score at 9 months	0.884	0.046	19.0	<0.001
	Seasonal factor x₁	0.078	0.068	1.14	0.256
	Seasonal factor x₂	−0.142	0.072	−1.99	0.049
	H pylori at 12 months	−0.054	0.098	−0.55	0.582
(R² = 78.4%)	Diarrhoea 9–12 months	−0.655	0.37	−1.76	0.082