. Author manuscript; available in PMC: 2012 Jul 1.

Published in final edited form as: J Hum Cap. 2011 Summer;5(2):207–254. doi: 10.1086/660885

Table A5.

Coefficients of the Cigarette Number Function of the Bivariate Probit Model of Child Neurodevelopment Risk Status^a

	Total sample	Low SES sample
Number of cigarettes during pregnancy
Maternal mental health problems	0.820 (0.566)	0.904 (1.122)
Maternal chronic physical health problems	0.088 (0.375)	0.285 (0.721)
Socioeconomic status index	0.131 (0.089)	0.103 (0.157)
African ancestry	0.337 (0.276)	0.216 (0.314)
Native ancestry	−0.310^* (0.162)	−0.572^** (0.235)
maternal age	−0.120^** (0.054)	−0.147^* (0.076)
maternal age squared	0.002^** (0.001)	0.002^* (0.001)
Mother is single	0.266 (0.175)	0.354 (0.284)
Mother is in a stable relationship	0.258^** (0.121)	0.412 (0.266)
Number of child’s older siblings	0.218^** (0.090)	0.233^** (0.117)
Brazil	−0.180 (0.174)	−0.057 (0.319)
Chile	−0.115 (0.133)	−0.020 (0.182)
Area-level average cigarette number	0.516^*** (0.084)	0.324^* (0.174)
Area-level average cigarette number × socioeconomic status index	−0.526^*** (0.163)	−0.759^*** (0.281)
Constant	1.847^** (0.864)	2.135^** (1.082)
Observations	1584	798

Note: Standard errors are in parentheses.

^{*, ** and ***}

indicate p <0.1, <0.05 and <0.01, respectively.