Table 3. Prevalence of the five signs among the three groups.
| Younger subjects (N = 31) | Older subjects (N = 30) | Patients with blepharoptosis (N = 39) | p value | |
| With natural-open eyes | ||||
| Puffy eyelid (+:−) | 6∶25 | 1∶29 | 9∶30 | 0.071 |
| Upper eyelid sulcus (+:−) | 2∶29 | 6∶24 | 4∶35 | 0.242 |
| Wrinkles on the forehead (+:−) | 1∶30* | 13∶17 | 28∶11 | <0.001 |
| With wide-open eyes | ||||
| An increase in the wrinkles on the forehead (+:−) | 11∶20 | 12∶18 | 7∶32 | 0.102 |
| DUES-like appearance (+:−) | 4∶27 | 3∶27 | 7∶32 | 0.627 |
All p values were obtained using the chi-square test.
* = statistically significant difference observed compared to the other two groups using Fisher's exact probability test and the Bonferroni correction.