. Author manuscript; available in PMC: 2010 Sep 6.

Published in final edited form as: Nicotine Tob Res. 2007 Nov;9(Suppl 4):S555–S570. doi: 10.1080/14622200701673480

Table 5.

Intercorrelations of FTND items using Wisconsin and Yale TTURC data

FTND items	1	2	3	4	5	6
1		.22	.38	.36	.39	.29
2	.28		.06	.24	.11	.26
3	.31	.03		.12	.39	.11
4	.27	.27	.12		.20	.22
5	.26	.02	.39	.07		.13
6	.30	.21	.07	.13	.15

Note. Intercorrelations above the diagonal are based on Wisconsin TTURC data and intercorrelations below the diagonal in italics are based on Yale TTURC data.

N's for Wisconsin data = 1,464 to 1,475 and N's for Yale data = 373 to 379.