Table 5.

Final factor loadings, eigenvalues, and variance explained in principal component analyses for the FTND-R and FTND.

Item	Factor 1	Factor 2
FTND-R
2. Smoke more first 2 hours of day	.67
4. Cigarette most hate to give up	.52
5. Difficult to refrain	.60
6. Smoke when ill	.73
Eigenvalue	1.60
Percent Variance	40.10%
FTND
2. Smoke more first 2 hours of day	--	.71
4. Cigarette most hate to give up	--	.82
5. Difficult to refrain	.81	--
6. Smoke when ill	.72	--
Eigenvalue	1.41	1.01
Percent Variance	35.34%	25.21%

Note. N = 343, FTND-R = Fagerström Test of Nicotine Dependence-Revised, FTND = Fagerström Test of Nicotine Dependence.