Table 2:

Associations between thymic indices and 6 wk vaccination-induced cortisol responsiveness (∆Cortisol) in infants determined by multivariate regression modelling

	Male				Female
	Regression model		∆Cortisol (µg/dL)		Regression model		∆Cortisol (µg/dL)
	R2	p	β (SE)	p	R2	P	β (SE)	p
Thymic index
1 w	0.243	0.016	−5.50 (1.81)	0.0032	0.346	<0.001	1.60 (1.46)	0.28
6 w	0.315	<0.001	−10.4 (2.95)	<0.001	0.216	0.0085	−1.278 (2.97)	0.67
10 w	0.286	0.0028	−11.6 (3.21)	<0.001	0.172	0.021	−2.309 (2.92)	0.43
15 w	0.222	0.034	−12.5 (3.27)	<0.001	0.204	0.014	−1.99 (3.04)	0.51

Regression models determined association between thymic index and cortisol response (∆Cortisol) controlling the factors: infant’s behaviour during saliva collection, saliva collection time, pre-vaccine cortisol, mode of delivery, birthweight, length for age Z-score, weight for length Z-score, and breastfeeding status. 1 w regression model was determined by using birthweight and birth length instead of weight for length and length for age Z-scores, respectively.