Table 2.
Participant demographics and grouping information.
| Group A | Group B | Group C | |||
|---|---|---|---|---|---|
| Number | 30 | 30 | 30 | / | / |
| Number of eyes | 30 | 30 | 30 | / | / |
| Sex (male: female) | 0.57 | 0.42 | 0.42 | χ2 = 0.407 | 0.816 |
| Age | 25.26 ± 2.24 | 24.90 ± 1.60 | 24.90 ± 1.68 | F = 1.220 | 0.300 |
| Years of smartphone use | 9.80 ± 2.36 | 8.80 ± 2.37 | 9.40 ± 3.46 | F = 1.220 | 0.378 |
Note: Data are presented as mean ± SD. Differences in sex composition were compared by Chi-square test, and differences in age and years of mobile phone use were analyzed by One-Way Anova. P ≤ 0.05 was regarded as a statistical difference.