Table 3.
Age 14 Alcohol Use
|
Age 14 Intoxication | Age 17½ Alcohol Use
|
Age 17½ Intoxication
|
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---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Step | Predictors | β | ΔR2 | ΔF | β | ΔR2 | ΔF | β | ΔR2 | ΔF | β | ΔR2 | ΔF |
1 | Demographics | .003 | 4.04** | .010 | 12.98*** | .006 | 6.93*** | .007 | 7.59*** | ||||
Sex | .046 | .094 | − .033 | − .050 | |||||||||
Zygosity | .027 | .039 | .039 | .034 | |||||||||
Sibling type | .023 | .014 | .034 | .027 | |||||||||
2a | APs | .029 | 23.98*** | .028 | 22.85*** | .010 | 7.11*** | .018 | 12.42*** | ||||
Dummy 1 | − .177 | − .169 | − .085 | − .047 | |||||||||
Dummy 2 | − .169 | − .150 | − .026 | .058 | |||||||||
Dummy 3 | − .093 | − .106 | .000 | .020 | |||||||||
Dummy 4 | − .348 | − .333 | − .129 | − .073 | |||||||||
Dummy 5 | − .071 | − .078 | − .019 | .030 | |||||||||
3a | PPs | .003 | 5.72** | .007 | 15.18*** | .002 | 2.97 | .003 | 5.11** | ||||
Dummy 1 | − .060 | − .143 | − .033 | − .075 | |||||||||
Dummy 2 | − .006 | − .065 | .011 | − .022 | |||||||||
Total | .035 | .045 | .018 | .027 | |||||||||
|
|||||||||||||
Age 14 Alcohol Use
|
Age 14 Intoxication
|
Age 17½ Alcohol Use
|
Age 17½ Intoxication
|
||||||||||
Step | Predictors | β | ΔR2 | ΔF | β | ΔR2 | ΔF | β | ΔR2 | ΔF | β | ΔR2 | ΔF |
| |||||||||||||
1 | Demographics | .003 | 4.04** | .010 | 12.98*** | .006 | 6.93*** | .007 | 7.59*** | ||||
Sex | .046 | .094 | − .033 | − .050 | |||||||||
Zygosity | .027 | .039 | .039 | .034 | |||||||||
Sibling type | .023 | .014 | .034 | .027 | |||||||||
2b | PPs | .009 | 18.98*** | .016 | 33.16*** | .004 | 6.62*** | .007 | 11.48*** | ||||
Dummy 1 | − .131 | − .205 | − .064 | − .113 | |||||||||
Dummy 2 | − .040 | − .094 | − .002 | − .036 | |||||||||
3b | APs | .022 | 18.57*** | .019 | 15.57*** | .008 | 5.64*** | .014 | 9.84*** | ||||
Dummy 1 | − .164 | − .144 | − .076 | − .033 | |||||||||
Dummy 2 | − .152 | − .118 | − .016 | .075 | |||||||||
Dummy 3 | − .084 | − .090 | .006 | .030 | |||||||||
Dummy 4 | − .317 | − .275 | − .107 | − .039 | |||||||||
Dummy 5 | − .065 | − .066 | − .015 | .036 | |||||||||
Total | .035 | .045 | .018 | .027 |
Note: APs = adolescent-derived profile membership; PPs = parent-derived profile membership. The significance of standardized coefficients for dummy- coded profile membership is not presented, as the interpretation of individual dummy-codes is meaningless. Demographic variables are coded 1 (boy, monozyotic, and same sex) and 2 (girl, dizygotic, and opposite sex).
p ≤ .01.
p ≤ .001.