Table V.

Summary results of final adjusted analyses of maternal prenatal exposure to nicotine and reading skill outcomes.

	Final
	1:Low		2:High		Overall
	Beta	p	Beta	p	p
Reading speed	−1.1	0.08	−3.0	0.03	0.03
Single-word identification	−0.6	0.08	−2.0	0.01	0.01
Spelling	−0.06	0.1	−0.3	0.001	0.002
Accuracy	−1.5	0.01	−5.2	<.0001	<.0001
Real words reading	−0.1	0.2	−0.8	0.0004	0.001
Nonword reading	−0.03	0.8	−0.4	0.2	0.4
Comprehension	−1.7	0.005	−4.6	0.0003	<.0001

Linear regression coefficients (Beta) and P values are presented. The non-smoking category is the reference group for nicotine exposure.