Table 4 Relationship between smartphone addiction and smoking, depression, insomnia, and ADHD symptoms
| Â | Smartphone addiction | No smartphone addiction | P-value | ||
|---|---|---|---|---|---|
Number | % | Number | % | 0.039* | |
Smoking | |||||
 Yes | 22 | 8.4 | 31 | 12.4 |  |
 Low independence | 7 | 2.7 | 20 | 8.0 | |
 Low to moderate independence | 6 | 2.3 | 4 | 1.6 | |
 Moderate independence | 7 | 2.7 | 6 | 2.4 | |
 High independence | 2 | .8 | 1 | .4 | |
 No smoking | 239 | 91.6 | 220 | 87.6 | |
Depression | |||||
 Moderate depression | 20 | 7.7 | 20 | 8.0 | 0.013* |
 Moderately severe depression | 42 | 16.1 | 11 | 4.4 | |
 Severe depression | 27 | 10.3 | 15 | 6.0 | |
 No depression | 172 | 65.9 | 205 | 81.7 | |
Insomnia | |||||
 insomnia | 151 | 65.7 | 99 | 44.4 | < 0.001* |
 No insomnia | 79 | 34.3 | 124 | 55.6 |  |
ADHD symptoms | |||||
 Have ADHD symptoms | 110 | 47.8 | 44 | 19.7 | < 0.001* |
 Have no ADHD symptoms | 120 | 52.2 | 179 | 80.3 | |