In utero and childhood exposure to tobacco smoke and multi-layer molecular signatures in children

Table 3 Correlation among variables of pregnancy and childhood exposure to tobacco smoking

		Pregnancy exposure		Childhood exposure
		Any maternal smoking in pregnancy	Sustained maternal smoking in pregnancy	Global-SHS	Home-SHS	Urinary cotinine
Pregnancy exposure	Any maternal smoking in pregnancy	1
Pregnancy exposure	Sustained maternal smoking in pregnancy	1*	1
Childhood exposure	Global-SHS	0.4	0.4	1
	Home-SHS	0.6	0.6	1**	1
	Urinary cotinine	0.7	0.7	0.7	0.8	1

*Complete cases were used to test the correlation between any and sustained maternal smoking in pregnancy, and since non-sustained smokers are excluded from sustained maternal smoking in pregnancy, both variables are virtually the same in this comparison
**By definition, all children exposed at home to SHS are also exposed in global-SHS (n = 214); however, unexposed children according to global-SHS are both exposed (n = 214) and unexposed (n = 777) at home

ISSN: 1741-7015