Table 1.

Demographic and Rating Scale Variables

Variable	Total group (n = 62)	Regular nicotine cigarette (n = 46)	De-nicotinized cigarette (n = 16)	p-value (Nic vs De-Nic groups)
Age	40.5 (± 1.5)	41.6 (± 1.7)	37.3 (± 3.4)	NS
Percent female	32.3%	34.8%	25.0%	NS
Cigs/day	24.2 (± 0.9)	24.9 (± 1.0)	22.3 (± 1.6)	NS
Years of smoking	22.5 (± 1.5)	23.5 (± 1.7)	19.8 (± 3.3)	NS
Education (yrs)	13.8 (± 0.2)	13.8 (± 0.3)	13.9 (± 0.3)	NS
FTND	6.4 (± 0.2)	6.4 (± 0.3)	6.4 (± 0.4)	NS
HAM-D	1.8 (± 0.3)	1.5 (± 0.3)	2.4 (± 0.6)	NS
HAM-A	2.0 (± 0.3)	1.7 (± 0.3)	2.6 (± 0.8)	NS
CO level (p.p.m.)	17.0 (± 1.1)	17.5 (± 1.5)	15.3 (± 1.7)	NS
% Change in UTS (craving) with smoking	−74.9 (± 3.1)	−76.0 (± 3.5)	−71.8 (± 6.9)	NS
% Change in STAI with smoking	−25.0 (± 15.0)	−26.1 (± 19.5)	−21.7 (± 16.3)	NS
% Change in Mood with smoking	7.6 (± 5.4)	15.2 (± 6.0)	−0.5 (± 4.4)	0.04

Values are stated as mean ( ± SEM); p-values are for unpaired Student’s t-tests between the groups that smoked either a regular nicotine or a denicotinized cigarette. Cig, cigarette; CO, exhaled carbon monoxide; De-Nic, denicotinized; FTND, Fagerström Test for Nicotine Dependence; HAM-A, Hamilton Anxiety Rating Scale; HAM-D, Hamilton Depression Rating Scale; Mood, mood analog rating scale score; Nic, nicotine; NS, nonsignificant; p.p.m., parts per million; STAI, Spielberger State-Trait Anxiety Index state anxiety questions total score; UTS, Urge to Smoke Scale; yrs, years.