Table 3.

Linear regression, testing associations of neonatal hair glucocorticoid concentrations, maternal glucocorticoid concentrations, birthweight z-score and exposures around delivery.

Exposure	Hair cortisol concentration		Hair cortisone concentration		Hair cortisol to cortisone ratio
	Unadjusted model	Adjusted model	Unadjusted model	Adjusted model	Unadjusted model	Adjusted model
Term Group
Corresponding maternal hair glucocorticoid	0.261*	0.240**	0.066	NA	0.066	NA
Birth gestation	0.257*	0.127	-0.015	NA	0.295**	0.157
Birthweight z-score	-0.287**	-0.340***	-0.023	NA	-0.304**	-0.365***
Labour
Spontaneous	Ref	Ref	Ref		Ref	Ref
Induced	-0.324**	-0.302**	-0.292*	NA	-0.163	-0.124
No labour	-0.505***	-0.489***	-0.129	NA	-0.474***	-0.484***
Preterm group
Corresponding maternal hair glucocorticoid	0.017	NA	-0.173	NA	0.215	NA
Birth gestation	0.425***	NA	0.354**	0.252*	0.166	NA
Birthweight z-score	0.108	NA	0.108	NA	0.026	NA
Labour
No labour	-0.008	NA	-0.147	NA	0.125	NA
Chorioamnionitis	0.185	NA	-0.297**	-0.227	0.459***	NA

Where at least two variables had a p < 0.1 in unadjusted models these were included as covariates into a mutually adjusted regression model.

^*p-value < 0.1.

^**p-value < 0.05.

^***p-value < 0.01.