Table 2.
Model statistics for final weekday sleep duration (n = 3405), weekend sleep duration (n = 3399), social sleep lag (n = 3324), and weekend sleep midpoint (n = 3391) models in an ordinal regression procedure. Numbers represent p values for each predictor variable, and asterisks indicate the model described in the main text and figures. Age is modeled as a restricted spline in both individual and interaction terms which contain age. Model building and selection is detailed in Supplementary Files 1–4.
| Gender | Race | Age | BMI | Age * BMI | Age * Gender | |
|---|---|---|---|---|---|---|
| Weekday sleep duration | ||||||
| Model 1 | 8.65 · 10−8 | - | - | - | - | - |
| Model 2 | 2.97 · 10−9 | 8.24 · 10−8 | - | - | - | - |
| Model 3* | 1.81 · 10−9 | 5.81 · 10−8 | 3.16 · 10−17 | - | - | - |
| Model 4 | 6.88 · 10−10 | 4.47 · 10−7 | 1.36 · 10−15 | 0.10 | - | - |
| Weekend sleep duration | ||||||
| Model 1 | 4.88 · 10−17 | - | - | - | - | - |
| Model 2 | 2.24 · 10−18 | 3.34 · 10−4 | - | - | - | - |
| Model 3* | 1.55 · 10−17 | 6.49 · 10−6 | 4.72 · 10−22 | - | - | - |
| Model 4 | 1.58 · 10−17 | 8.06 · 10−6 | 5.92 · 10−22 | 0.80 | - | - |
| Social sleep lag | ||||||
| Model 1 | 3.46 · 10−3 | - | - | - | - | - |
| Model 2 | 5.38 · 10−3 | 0.03 | - | - | - | - |
| Model 3* | 0.08 | 0.87 | 6.59 · 10−76 | - | - | - |
| Model 4 | 0.09 | 0.86 | 1.26 · 10−75 | 0.87 | - | - |
| Weekend sleep midpoint | ||||||
| Model 1 | 0.01 | - | - | - | - | - |
| Model 2 | 0.02 | 0.29 | - | - | - | - |
| Model 3 | 0.11 | 0.77 | 4.02 · 10−80 | - | - | - |
| Model 4 | 0.16 | 0.56 | 2.09 · 10−80 | 8.56 · 10−3 | - | - |
| Model 5 | 0.23 | 0.60 | 1.55 · 10−80 | 8.44 · 10−3 | 5.42 · 10−4 | - |
| Model 6* | 0.24 | 0.58 | 9.32 · 10−81 | 7.96 · 10−3 | 2.21 · 10−4 | 5.18 · 10−5 |