Table 1.

Twin correlations of log-transformed means of alcohol consumption over time

	Twin 1
Twin 2	Epoch 1 (age 12–14 years)	Epoch 2 (age 15–17 years)	Epoch 3 (age 18–21 years)	Epoch 4 (age 22–25 years)	Epoch 5 (age 26–29 years)	Epoch 6 (age 30–33 years)
Monozygotic twins
Epoch 1	0.24
Epoch 2	0.26	0.37
Epoch 3	0.18	0.37	0.56
Epoch 4	0.14	0.32	0.49	0.51
Epoch 5	0.12	0.28	0.39	0.45	0.45
Epoch 6	0.12	0.27	0.36	0.42	0.44	0.44
Dizygotic twins
Epoch 1	0.28
Epoch 2	0.24	0.33
Epoch 3	0.2	0.3	0.38
Epoch 4	0.2	0.25	0.33	0.25
Epoch 5	0.19	0.21	0.27	0.17	0.19
Epoch 6	0.15	0.16	0.21	0.19	0.19	0.23