Table 1.
Demographics of participants
| Adult | Teenager | P -value | |
|---|---|---|---|
| No. of subjects (n) |
26 |
26 |
- |
| Male: female |
13: 13 |
13: 13 |
0.999 |
| Age (yr) |
28.4 ± 5.1 |
15.3 ± 0.7 |
< 0.001 |
| Height (cm) |
167.1 ± 8.0 |
164.4 ± 7.3 |
0.207 |
| Weight (kg) |
59.4 ± 11.1 |
57.8 ± 10.4 |
0.590 |
| Body mass index (kg/m2) |
21.1 ± 2.3 |
21.3 ± 2.8 |
0.796 |
| Non-smoker: smoker |
24 : 2 |
25 : 1 |
0.999 |
| Computer usage time (hr/day) |
5.3 ± 3.7 |
2.2 ± 2.0 |
0.002 |
| TV viewing time (hr/day) |
1.7 ± 1.1 |
1.9 ± 1.6 |
0.783 |
| Mobile phone usage time (hr/day) |
0.6 ± 0.5 |
1.3 ± 1.3 |
0.116 |
| Mobile phone usage periods (yr) | 11.8 ± 2.4 | 5.7 ± 1.9 | < 0.001 |