Use of electronic devices in the last hour before going to sleep and daytime screen use as risk factors for short sleep duration among girls and boys in the youth@hordaland study (n=9846)†
| <5 h | 5–6 h | 6–7 h | 7–8 h | |||||
|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
| Electronic devices used in the last hour before bedtime | ||||||||
| PC | 2.70*** | 2.14 to 3.39 | 2.69*** | 2.09 to 3.46 | 2.30*** | 1.90 to 2.79 | 1.64*** | 1.38 to 1.96 |
| Cell phone | 1.85*** | 1.45 to 2.35 | 1.65*** | 1.28 to 2.13 | 1.75*** | 1.42 to 2.15 | 1.50*** | 1.24 to 1.83 |
| MP3-player | 1.52*** | 1.29 to 1.78 | 1.46*** | 1.12 to 1.73 | 1.33*** | 1.15 to 1.53 | 1.19* | 1.03 to 1.36 |
| iPad or other tablet | 1.19* | 1.01 to 1.41 | 1.29** | 1.09 to 1.54 | 1.18* | 1.92 to 1.37 | 1.10 | 0.95 to 1.28 |
| Console | 1.40*** | 1.19 to 1.64 | 1.38*** | 1.17 to 1.64 | 1.27** | 1.09 to 1.47 | 1.17* | 1.01 to 1.35 |
| TV | 1.51*** | 1.29 to 1.77 | 1.44*** | 1.22 to 1.71 | 1.35*** | 1.17 to 1.56 | 1.16* | 1.01 to 1.33 |
| Daytime screen use | ||||||||
| Total screen time (4 h+) | 3.64*** | 3.06 to 4.33 | 2.66*** | 2.22 to 3.19 | 2.07*** | 1.79 to 2.40 | 1.29*** | 1.12 to 1.49 |
| Console games (2 h+) | 2.03*** | 1.53 to 2.69 | 1.73*** | 1.28 to 2.35 | 1.58** | 1.21 to 2.06 | 1.20 | 0.92 to 1.58 |
| PC games (2 h+) | 1.90*** | 1.51 to 2.38 | 1.22 | 0.95 to 1.58 | 1.39** | 1.12 to 1.73 | 1.06 | 0.86 to 1.32 |
| Online chat (2 h+) | 3.58*** | 3.03 to 4.24 | 2.79*** | 2.33 to 3.33 | 1.98*** | 1.70 to 2.30 | 1.31*** | 1.13 to 1.51 |
| Email (2 h+) | 3.28*** | 2.07 to 5.16 | 2.42*** | 1.48 to 3.95 | 1.34 | 0.84 to 2.14 | 1.14 | 0.72 to 1.82 |
| Other PC use (2 h+) | 2.06*** | 1.74 to 2.42 | 2.04*** | 1.71 to 2.44 | 1.54*** | 1.33 to 1.78 | 1.21** | 1.05 to 1.39 |
*p<0.05; **p<0.01; ***p<0.001.
†Reference: 8–9 h.