Table 1 Participants’ demographic data. Table reproduced from Chapple et al. 2017 [23]
|  | China (n = 4136) | Taiwan (n = 2068) | South Korea (n = 2080) | Overall (n = 8284) |
|---|---|---|---|---|
Sex | ||||
 Men | 50.3% | 48.6% | 47.6% | 49.2% |
 Women | 49.7% | 51.4% | 52.4% | 50.8% |
Age group | ||||
 40–44 years | 19.9% | 15.6% | 16.9% | 18.1% |
 45–49 years | 19.6% | 16.1% | 16.8% | 18.0% |
 50–54 years | 15.3% | 16.3% | 16.3% | 15.8% |
 55–59 years | 12.7% | 14.9% | 14.4% | 13.7% |
  ≥ 60 years | 32.6% | 37.1% | 35.6% | 34.4% |
Education | ||||
 High school or less | 28.0% | 39.3% | 30.3% | 31.4% |
 Some college | 28.4% | 23.7% | 3.4% | 20.9% |
 College degree/college graduate | 40.2% | 28.2% | 57.0% | 41.4% |
 Postgraduate | 3.5% | 8.8% | 9.4% | 6.3% |
Marital status | ||||
 Single | 2.9% | 14.9% | 9.2% | 7.5% |
 Divorced | 1.5% | 5.2% | 4.0% | 3.0% |
 Married/living with partner | 91.7% | 72.8% | 81.6% | 84.5% |
 Widow/widower | 3.2% | 6.3% | 4.5% | 4.3% |
 Prefer not to answer | 0.8% | 0.7% | 0.7% | 0.7% |
Work status | ||||
 Homemaker | 2.6% | 12.0% | 22.4% | 9.9% |
 Retired | 28.7% | 16.9% | 6.0% | 20.1% |
 Student | 0.0% | 0.1% | 0.2% | 0.1% |
 Working, full-time | 62.6% | 60.0% | 53.9% | 59.8% |
 Working, part-time | 3.7% | 6.2% | 8.0% | 5.4% |
 Other work for pay | 0.4% | 0.8% | 3.2% | 1.2% |
 Other | 1.1% | 1.9% | 3.7% | 2.0% |
 Unemployed | 0.6% | 1.3% | 2.3% | 1.2% |
 Permanently disabled/cannot work due to ill health | 0.1% | 0.8% | 0.4% | 0.4% |