Table 3.
Multilevel negative binomial models estimating associations between sleep and next-day alcohol/cannabis use.
| Alcohol Use (n = 405) |
Cannabis Use (n = 384) |
|
|---|---|---|
| Count Ratio [95% CI] | Count Ratio [95% CI] | |
| Person-Level (Level 3) | ||
| Birth Sex (0=Male; 1=Female) | 0.983 [0.798, 1.212] | 0.529 [0.369, 0.759]*** |
| Baseline Age | 1.034 [0.970, 1.103] | 0.994 [0.889, 1.113] |
| College Student (0=No; 1=Yes) | 1.018 [0.769, 1.348] | 0.898 [0.550, 1.464] |
| Race/Ethnicity (ref = White/Caucasian) | ||
| Asian/Asian American | 0.628 [0.467, 0.845]*** | 0.491 [0.287, 0.840]** |
| Other non-Hispanic | 0.764 [0.583, 1.002] | 1.244 [0.773, 2.003] |
| Hispanic | 1.130 [0.842, 1.516] | 1.427 [0.867, 2.350] |
| Person-Mean Hours High (gmc) | 1.079 [0.983, 1.184] | --- |
| Person-Mean Number of Drinks | --- | 1.097 [0.920, 1.308] |
| Person-Mean Sleep Duration (gmc) | 0.939 [0.800, 1.103] | 0.882 [0.677, 1.151] |
| Burst-Level (Level 2) | ||
| Burst Number | 0.925 [0.896, 0.955]*** | 0.879 [0.845, 0.915]*** |
| Burst-Mean Hours High (pmc) | 0.978 [0.918, 1.042] | --- |
| Burst-Mean Number of Drinks (pmc) | --- | 0.969 [0.902, 1.042] |
| Burst-Mean Sleep Duration (pmc) | 0.913 [0.841, 0.990]* | 1.036 [0.939, 1.142] |
| Day-Level (Level 1) | ||
| Day Number within Burst | 0.997 [0.986, 1.008] | 0.996 [0.989, 1.002] |
| Day of Week (ref. = Monday) | ||
| Tuesday | 1.128 [0.990, 1.286] | 0.925 [0.854, 1.001] |
| Wednesday | 1.309 [1.150, 1.491]*** | 1.007 [0.930, 1.090] |
| Thursday | 1.571 [1.381, 1.787]*** | 1.021 [0.943, 1.106] |
| Friday | 2.775 [2.397, 3.213]*** | 1.218 [1.113, 1.334]*** |
| Saturday | 2.614 [2.253, 3.033]*** | 1.281 [1.169, 1.404]*** |
| Sunday | 1.154 [0.998, 1.334] | 1.087 [0.998, 1.185] |
| Work or School on this Day (0=No; 1=Yes) (pmc) | 0.845 [0.765, 0.933]*** | 0.879 [0.826, 0.936]*** |
| Work or School Tomorrow (0=No; 1=Yes) (pmc) | 0.724 [0.656, 0.800]*** | 0.934 [0.878, 0.995]* |
| Hours High (bmc) | 1.049 [1.018, 1.082]** | --- |
| Number of Drinks (bmc) | --- | 1.020 [1.008, 1.031]*** |
| Last Night Sleep Duration (bmc) | 0.992 [0.966, 1.019] | 1.016 [0.988, 1.044] |
Note. Models excluded participants that did not report any alcohol/cannabis use days across the entire study period for their respective models. Gmc = grand mean centered. Pmc = person mean centered. Bmc = burst mean centered. Models are fit with random intercepts for each participant and for each burst, and random slopes for sleep duration at the day level.