| Characteristics | Number of subjects | |
| Younger group | Senior group | |
| Age (years) 21 - 23 66 - 84 |
16
|
16 |
| Gender Male Female |
8 8 |
8 8 |
| Marital status Married Never married |
16 |
16
|
| Employment Student Fulltime Part-time Retired |
14 2
|
2 4 10 |
| Ethnicity Japanese |
16 |
16 |