Figure1
Negative correlation between average daily energy intake and average total sleep duration in a sample of 51 Dutch students (r = −0.378, p = 0.006). Energy intake is the individual daily average over 7 days as reported in a food diary. Total sleep time is the individual daily average sleep time including daytime naps as reported in a sleep diary.
Table 1
Correlational analyses on the food and sleep diary data.
| Analysis | r | p |
|---|---|---|
| Primary analyses: total sleep time | ||
| total sleep time (including daytime napping) & total energy intake (kcal) | −0.378 | 0.006* |
| total sleep time (including daytime napping) & fat intake (%) | 0.132 | 0.355 |
| total sleep time (including daytime napping) & saturated fat intake (%) | 0.320 | 0.022 |
| total sleep time (including daytime napping) & carbohydrate intake (%) | 0.090 | 0.530 |
| total sleep time (including daytime napping) & protein intake (%) | −0.283 | 0.044 |
| Sensitivity analyses: nighttime sleep | ||
| nighttime sleep & total energy intake (kcal) | −0.379 | 0.006 |
| nighttime sleep & fat intake (%) | 0.148 | 0.301 |
| nighttime sleep & saturated fat intake (%) | 0.270 | 0.055 |
| nighttime sleep & carbohydrate intake (%) | 0.069 | 0.631 |
| nighttime sleep & protein intake (%) | −0.261 | 0.064 |
| Sensitivity analysis: total sleep time and energy intake (kcal) divided by time awake | ||
| total sleep time (including daytime napping )& energy intake (kcal) per awake minute | −0.187 | 0.190 |
| Sensitivity analyses: total sleep time and energy consumed during different meals | ||
| total sleep time (including daytime napping) & energy intake (kcal) during breakfast | −0.228 | 0.104 |
| total sleep time (including daytime napping) & energy intake (kcal) during lunch | −0.215 | 0.125 |
| total sleep time (including daytime napping) & energy intake (kcal) during dinner | −0.206 | 0.142 |
| total sleep time (including daytime napping) & energy intake (kcal) as snacks | −0.214 | 0.128 |