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. Author manuscript; available in PMC: 2013 Jan 29.
Published in final edited form as: Neuropsychopharmacology. 2009 Jun 3;34(10):2252–2264. doi: 10.1038/npp.2009.52

Table 4.

Multiplex Ever Smoker Pedigree Cohort Covariate Associations with the FTND

Variable N FTND M (SD) r or t1 P2 t3 P4
Age5 423 3.9 (2.7) 0.24 <0.001 6.87 <0.0001
Depressive symptoms6 410 3.9 (2.7) 0.11 0.022 3.65 0.0003
Education
 ≥16 years 110 3.3 (3.0) 3.07 0.002 4.93 <0.0001
 <16 years 312 4.2 (2.5)
Sex
 Female 219 3.6 (2.7) 2.43 0.015 2.83 0.0048
 Male 206 4.3 (2.6)
1

Univariate association estimate.

2

Univariate P.

3

Multivariate association estimate.

4

Multivariate P.

5

Mean (SD) 39.4 (13.6).

6

Mean (SD) 11.9 (9.4)

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