Table 5.
Activities in the last hour before sleep with significant (p < 0.05) or trend-level (p < 0.10) relationships with sleep outcomes.
| Activity | B | Minutes | 95% CI | P |
|---|---|---|---|---|
| TIB | ||||
| Computer work | −0.092 | −5.52 | (−0.134, −0.05) | <0.001 |
| Listen to music | −0.046 | −2.76 | (−0.097, 0.005) | 0.076 |
| Read printed material | −0.051 | −3.06 | (−0.099, −0.003) | 0.037 |
| Text on phone | 0.054 | 3.24 | (−0.004, 0.111) | 0.066 |
| TST | ||||
| Computer work | −0.086 | −5.16 | (−0.127, −0.045) | <0.001 |
| Listen to music | −0.042 | −2.52 | (−0.091, 0.008) | 0.097 |
| Read printed material | −0.052 | −3.12 | (−0.099, −0.006) | 0.027 |
| Surf the internet | −0.07 | −4.20 | (−0.144, 0.005) | 0.068 |
| BT | ||||
| Computer work | 0.057 | 3.42 | (0.015, 0.1) | 0.008 |
| Email or instant messaging | −0.082 | −4.92 | (−0.175, 0.01) | 0.081 |
| Play video game | 0.258 | 15.48 | (0.101, 0.415) | 0.001 |
| SOL | ||||
| Surf the internet | 0.023 | 1.38 | (0.007, 0.039) | 0.004 |
| WASO | ||||
| Listen to audiobook | 0.071 | 4.26 | (−0.007, 0.150) | 0.075 |
| Surf the internet | 0.022 | 1.32 | (0.010, 0.034) | <0.001 |
Minutes = number of minutes per block that activity reduces/increases sleep outcome. For example, computer work reduces TST by 5.16 min and pushes BT later by 3.42 min per 15-min block.