Spatial variability of the effect of air pollution on term birth weight: evaluating influential factors using Bayesian hierarchical models

Table 2 Statistics of the effects^a of NO₂ and NO_x on term birth weight across all the tracts

Pollutants	Period	Mean (g/ppb)	95 % confidence intervals	Mean of deviance information criterion
NO₂(ppb)	1st trimester	−0.99	[−1.39, −0.59]	512
	2st trimester	−0.79	[−1.26, −0.32]	501
	3st trimester	−1.27	[−1.72, −0.82]	505
	Entire Pregnancy	−1.89	[−2.23, −1.55]	454
NO_x(ppb)	1st trimester	−0.54	[−0.80, −0.28]	514
	2st trimester	−0.52	[−0.78, −0.26]	512
	3st trimester	−0.61	[−0.90, −0.32]	512
	Entire Pregnancy	−0.87	[−1.09, −0.65]	465

^aChange in term birth weight (g) per unit increase in exposure to air pollution (ppb)

ISSN: 1476-069X