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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Addict Behav. 2010 Oct 14;36(3):175–182. doi: 10.1016/j.addbeh.2010.10.001

Table 3.

Twin correlations. Polychoric correlations for ordinalized twin data are presented for monozygotic twins (below diagonal, and listed first on the diagonal) and dizygotic twins (above the diagonal, and listed second on the diagonal).

Wave 2
SxAnxDep		 Wave 3
SxAnxDep		 Wave 4
SxAnxDep		 Wave 2
Intox		 Wave 3
Intox		 Wave 4
Intox
Wave 2 SxAnxDep 0.50/0.36 0.37 0.28 0.09 0.08 0.02
Wave 3 SxAnxDep 0.44 0.54/0.46 0.34 0.17 0.05 0.02
Wave 4 SxAnxDep 0.38 0.41 0.47/0.32 0.08 0.11 0.00
Wave 2 Intox 0.01 −0.01 −0.04 0.84/0.57 0.39 0.09
Wave 3 Intox 0.13 0.08 0.09 0.59 0.85/0.66 0.23
Wave 4 Intox 0.01 0.01 0.00 0.37 0.54 0.72/0.32