. Author manuscript; available in PMC: 2013 Mar 2.

Published in final edited form as: Psychopharmacology (Berl). 2009 Nov 21;208(1):143–158. doi: 10.1007/s00213-009-1716-z

Table 4.

Effect of tobacco smoke exposure on responding for food pellets.

Time	Active lever		Inactive lever
	C (n=10)	Tobacco (n=10)	C (n=10)	Tobacco (n=10)

3W/Day 22 – 24 hrs	255.6 ± 3.9	148.0 ± 20.1**	0.1 ± 0.1	4.7 ± 2.8
3W/Day 23 – 40 min	256.0 ± 3.4	200.1 ±19.2**	1.3 ± 0.9	2.4 ± 1.5
4W/Day 29 – 24 hrs	256.0 ± 3.4	177.5 ± 20.1**	0.4 ± 0.3	3.7 ± 1.9
4W/Day 30 – 40 min	259.6 ± 3.6	202.5 ± 20.8*	0.2 ± 0.1	0.2 ± 0.1

Data are expressed as means (± S.E.M.). Abbreviations: C, control group; 3W, 3 weeks of smoke exposure; 4W, 4 weeks of smoke exposure. Time (min/hrs) indicates duration after last smoke exposure session. Asterisks (**P<0.01, *P<0.05) indicate fewer responses on the active lever compared to the control group.