. Author manuscript; available in PMC: 2008 Nov 15.

Published in final edited form as: Biol Psychiatry. 2007 Jun 1;62(10):1155–1161. doi: 10.1016/j.biopsych.2006.12.027

Table 4. Means (SEM) startle magnitude (μV) in the PPI experiment.

INSTRUCTION	Stimulus type	Non smokers	Non abstinent smokers	Abstinent smokers
Attend	Control startle	15.3 (12.1)	16.5 (13.2)	23.8 (19.1)
	Prepulse	10.3 (9.0)	10.0 (12.6)	11.5 (12.4)
	PPI^*	5.0 (10.3)	6.4 (5.1)	12.2 (15.9)
Ignore	Control startle	14.0 (11.7)	15.0 (11.9)	23.1 (17.0)
	Prepulse	10.5 (8.9)	11.3 (13.6)	12.5 (13.0)
	PPI^*	3.4 (10.6)	3.6 (6.0)	10.5 (15.1)

PPI was calculated as the difference score between control startle trials and prepulse trials