TABLE 2.
Prevalence of screen time, obesity and chronic back pain across the four survey waves
| 2002 | 2006 | 2010 | 2014 | |
|---|---|---|---|---|
| Mean screen hours per day (SD) | 3.99 (2.40) | 5.58 (3.66) | 6.05 (3.87) | 6.40 (4.28) |
| Screen time (% exceeding 2 h/day) | 80.18 | 87.77 | 89.76 | 88.59 |
| BMI (mean; SD) | 19.13 (3.22) | 19.39 (3.29) | 19.50 (3.39) | 19.56 (3.46) |
| Obesity (% PC > 97) | 4.02 | 4.45 | 5.18 | 5.25 |
| Back pain (%) | ||||
| Rarely or never | 65.05 | 64.27 | 62.26 | 59.04 |
| About every month | 16.89 | 16.83 | 17.84 | 18.76 |
| About every week | 7.72 | 7.81 | 8.46 | 9.26 |
| More than once a week | 5.82 | 6.08 | 6.22 | 7.07 |
| About every day | 4.52 | 5.00 | 5.22 | 5.87 |
| Chronic back pain (%) | 18.06 | 18.89 | 19.90 | 22.20 |
Abbreviation: BMI, body mass index.