Table 6. Stochastic Actor-Based model of friendship tie choice and adolescent drinking behavior for "Jefferson High" (n = 976).
| Effect name | Model 1 | Model 2 | Model 3 | Model 4 | ||||
|---|---|---|---|---|---|---|---|---|
| Network decision: Friendship tie choice | beta | s.e. | beta | s.e. | beta | s.e. | beta | s.e. |
| Constant friendship rate (period 1) | 35.55*** | 2.51 | 35.01*** | 2.19 | 35.23*** | 2.09 | 35.42*** | 1.85 |
| Out-degree (density) | -2.51*** | 0.24 | -2.47*** | 0.26 | -2.37*** | 0.22 | -2.46*** | 0.29 |
| Reciprocity | 2.73*** | 0.11 | 2.75*** | 0.10 | 2.73*** | 0.11 | 2.74*** | 0.12 |
| Transitive triplets | 0.51*** | 0.04 | 0.51*** | 0.04 | 0.51*** | 0.04 | 0.51*** | 0.04 |
| 3-cycles | -0.43*** | 0.07 | -0.43*** | 0.09 | -0.44*** | 0.09 | -0.42*** | 0.08 |
| In-degree popularity | 0.04* | 0.02 | 0.04* | 0.02 | 0.03*** | 0.01 | 0.04** | 0.01 |
| In-in degree^(1/2) assortativity | -0.03 | 0.03 | -0.04 | 0.03 | -0.03 | 0.02 | -0.04 | 0.04 |
| Gender similarity | 0.27*** | 0.04 | 0.27*** | 0.06 | 0.27*** | 0.04 | 0.27*** | 0.06 |
| Grade similarity | 0.41*** | 0.03 | 0.41*** | 0.03 | 0.41*** | 0.02 | 0.41*** | 0.03 |
| Parental education similarity | 0.04 | 0.02 | 0.04 | 0.02 | 0.04 | 0.03 | 0.04 | 0.03 |
| Parental support ego | 0.03 | 0.08 | 0.31 | 0.68 | 0.03 | 0.08 | 0.04 | 0.07 |
| Parental monitoring ego | -0.31 | 0.23 | -0.30 | 0.24 | -0.76 | 0.88 | -0.30 | 0.27 |
| Parental home drinking environment ego | 0.00 | 0.04 | 0.00 | 0.02 | -0.01 | 0.03 | -0.06 | 0.08 |
| Drinking alter | 0.11** | 0.04 | 0.10 | 0.10 | 0.12** | 0.04 | 0.07 | 0.09 |
| Drinking ego | -0.08* | 0.04 | -0.07* | 0.04 | -0.08** | 0.03 | -0.08† | 0.04 |
| Drinking similarity | 0.14* | 0.06 | 0.13* | 0.05 | 0.14*** | 0.04 | 0.13* | 0.04 |
| Parental support ego x Drinking alter | -0.14 | 0.28 | ||||||
| Parental monitoring ego x Drinking alter | 0.25 | 0.52 | ||||||
| Parental home drinking environment ego x Drinking alter | 0.03 | 0.05 | ||||||
| Behavior decision: Alcohol use | ||||||||
| Rate drinking behavior (period 1) | 21.82*** | 2.06 | 21.61*** | 2.17 | 21.17*** | 2.61 | 21.04*** | 2.73 |
| Drinking behavior linear shape | -1.36*** | 0.25 | -1.57*** | 0.40 | -1.27*** | 0.22 | -1.40*** | 0.24 |
| Drinking behavior quadratic shape | 0.23*** | 0.03 | 0.23*** | 0.02 | 0.23*** | 0.02 | 0.23*** | 0.03 |
| Drinking behavior in-degree | 0.01† | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| Drinking behavior peer influence | 0.36* | 0.16 | 0.29† | 0.15 | 0.32* | 0.14 | -0.09 | 0.71 |
| Effect from gender (female = 1) | -0.09** | 0.03 | -0.10** | 0.04 | -0.10* | 0.04 | -0.10* | 0.05 |
| Effect from grade | 0.02 | 0.03 | 0.04 | 0.03 | 0.01 | 0.02 | 0.03 | 0.03 |
| Effect from depressive symptoms | 0.03 | 0.07 | 0.03 | 0.04 | 0.03 | 0.06 | 0.03 | 0.05 |
| Effect from parental home drinking environment | 0.06* | 0.03 | 0.06** | 0.02 | 0.06* | 0.03 | 0.05 | 0.04 |
| Effect from parental support | -0.07 | 0.12 | -0.01 | 0.18 | -0.08 | 0.08 | -0.07 | 0.08 |
| Effect from parental monitoring | -0.34 | 0.30 | -0.28 | 0.17 | -0.49† | 0.29 | -0.35 | 0.29 |
| Effect from parental support x peer influence | -0.31 | 6.98 | ||||||
| Effect from parental monitoring x peer influence | -1.75 | 2.97 | ||||||
| Effect from parental home drinking environment x peer influence | 0.38 | 0.52 | ||||||
† Two-sided p<0.1.
* Two-sided p<0.05.
** Two-sided p<0.01.
*** Two-sided p<0.001.