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. Author manuscript; available in PMC: 2010 Jul 19.
Published in final edited form as: J Psychophysiol. 2009;23(2):52–62. doi: 10.1027/0269-8803.23.2.52

Table 5.

Mean (SD) for P50, N100, and P200 ratio and difference score for smokers (n = 11) and nonsmokers (n = 11)

P50 N100 P200
Smoking Non Smoking Non Smoking Non
Ratio 66.32
(35.72)		 53.07
(32.34)		 56.46
(24.22)		 44.14
(21.30)		 62.77
(23.65)		 45.58
(28.23)
Difference
score		 0.77
(0.63)		 1.66
(1.60)		 −2.78
(2.08)		 −4.59
(3.85)		 4.56
(4.11)		 7.20
(5.10)

Note. The two groups were matched at the group level for gender, age, education, and Shipley total score.