Table 4.
Analysis of variance test results of 3 Poisson mixed-effects models relative to a baseline model for the selection of the random intercept or slope effects.
| Models | Akaike information criterion | P value (analysis of variance) |
| Count of cigarettes (approximately 1) | 15853.0 | N/Aa |
| Count of cigarettes (approximately 1 + [1|participant_ID]) | 15754.1 | <.001 |
| Count of cigarettes (approximately 1 + [hour|participant_ID]) | 15754.5 | .17 |
| Count of cigarettes (approximately hour + [1|participant_ID]) | 15750.7 | .02 |
aN/A: not applicable (reference model).