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Correlation analysis of anxiety and continuous variables.
| Mean (SD) | 1 | 2 | 3 | |
|---|---|---|---|---|
| 1. Anxiety | 2.44 (3.47) | 1 | ||
| 2. Problematic smartphone use | 38.72 (11.13) | 0.459** | 1 | |
| 3. Sleep disturbance | 14.94 (6.13) | 0.579** | 0.404** | 1 |
*Significant at the 0.05 level (two-tailed).
** Significant at the 0.01 level (two-tailed).
