Table 1 Characteristics of survey population (N,%)
| Â | Total N(%) | Participants with evaluable photographs N(%) | Non-participants or participants with non-evaluable photographs N(%) | p value | |
|---|---|---|---|---|---|
*Age (Yrs) |  |  | 61.25 ± 7.37 | 61.47 ± 7.46 | 0.38 |
**Gender | Male | 2467 (37.5) | 2043 (39.5) | 424 (38.7) | 0.63 |
Female | 3800 (62.5) | 3129 (60.5) | 671 (61.3) | Â | |