Table 3.
Outcomes of Unplanned vs. Planned Drinking
| Independent variable | Est | SE | IRR | 95% CI | p-value |
|---|---|---|---|---|---|
| DV: Number of Drinksa | |||||
| Occasion-level (Level-1) | |||||
| Unplanned occasion (ref = planned) | −0.26 | 0.05 | 0.77 | (0.70, 0.85) | <.01 |
| Day-level (Level-2) | |||||
| Unplanned occasion (ref = planned) | −0.42 | 0.02 | 0.66 | (0.63, 0.69) | <.01 |
| DV: Number of Consequencesb | |||||
| Day-level (Level-1) | |||||
| Unplanned occasion (ref = planned) | −0.18 | 0.08 | 0.83 | (0.72, 0.97) | .02 |
Note. IRR = incidence rate ratio
a
Occasion-level (Level-1) effects were day-mean centered, daily-level (Level-2) effect were person-mean centered.
b
Consequences were assessed once daily, and this model is two-levels: Day-level (Level-1) effects are person-mean centered and Level-2 (person-level) effects were grand-mean centered.