Table 1. Characteristics of study subjects (n = 229,099).
| Variable | Category | N | % (weighted) |
|---|---|---|---|
| Sex | Male | 102,572 | 49.6 |
| Female | 126,527 | 50.4 | |
| Age group, years | 19–29 | 23,383 | 17.3 |
| 30–39 | 26,712 | 16.4 | |
| 40–59 | 80,082 | 39.5 | |
| ≥60 | 98,922 | 26.8 | |
| Education level | No or primary education | 57,901 | 12.7 |
| Middle school | 25,505 | 8.2 | |
| High school | 75,409 | 37.1 | |
| College or higher | 70,060 | 42.0 | |
| Marital status | Currently married | 152,095 | 63.9 |
| Ever-married | 41,416 | 12.4 | |
| Never-married | 35,372 | 23.7 | |
| Live alone | No | 194,090 | 88.8 |
| Yes | 34,835 | 11.2 | |
| Employment status | Self-employed | 43,153 | 14.8 |
| Salaried | 85,855 | 47.0 | |
| Economically inactive | 94,420 | 38.2 | |
| Subjective health status | Very healthy | 10,590 | 5.5 |
| Healthy | 67,216 | 33.2 | |
| Neutral | 102,443 | 46.2 | |
| Unhealthy | 39,229 | 12.5 | |
| Very unhealthy | 9,604 | 2.5 | |
| Contact frequency with relative/family | <1/month | 34,748 | 18.1 |
| 1/month | 27,685 | 14.5 | |
| 2–3/month | 32,099 | 15.0 | |
| 1/week | 28,911 | 12.6 | |
| 2–3/week | 38,537 | 14.7 | |
| ≥4/week | 67,039 | 25.2 | |
| Contact frequency with neighbor | <1/month | 73,594 | 47.4 |
| 1/month | 14,428 | 7.6 | |
| 2–3/month | 14,692 | 7.0 | |
| 1/week | 17,570 | 7.6 | |
| 2–3/week | 32,158 | 11.6 | |
| ≥4/week | 75,357 | 18.8 | |
| Contact frequency with friend | <1/month | 45,724 | 16.7 |
| 1/month | 28,886 | 13.3 | |
| 2–3/month | 30,814 | 14.8 | |
| 1/week | 24,592 | 11.9 | |
| 2–3/week | 40,378 | 18.4 | |
| ≥4/week | 58,465 | 25.0 |
The frequency (N) is based on the sample. % is estimated for the population by adjusting for the sampling weights in the complex survey data.