Table 1.
Demographic, Socioeconomic and Medical Characteristics (n = 153)
| Characteristics | Median [25th, 75th Percentiles] or n (%) | Range |
|---|---|---|
| Age (year) | 71 [65, 80] | 47–92 |
| Sex | ||
| Male | 130 (85.0) | |
| Female | 23 (15.0) | |
| Residence | ||
| Urban | 143 (93.5) | |
| Rural area | 10 (6.5) | |
| Education | ||
| Illiteracy | 2 (1.3) | |
| Primary school | 22 (14.4) | |
| Junior middle school | 52 (34.0) | |
| Senior middle school | 48 (31.4) | |
| University | 29 (18.9) | |
| Employment status | ||
| Currently working | 9 (5.9) | |
| Retired | 119 (77.8) | |
| Other | 25 (16.2) | |
| Medical insurance | ||
| No insurance | 17 (11.1) | |
| URMI and NRCMI | 115 (75.2) | |
| Free Medical Service | 13 (8.5) | |
| Medical Insurance outside Beijing | 8 (5.2) | |
| Smoking status | ||
| Never-smoker | 32 (20.9) | |
| Ex-smoker | 76 (49.7) | |
| Current-smoker | 45 (29.4) | |
| Smoking index (pack·year)a | 30.0 [20.0, 46.3] | 2.5–112.0 |
Notes: Data are presented as median [25th, 75th percentiles] or n (%); aSmoking index was calculated in current- and ex-smokers.
Abbreviations: BMI, body mass index; URMI, Urban Residents Medical Insurance; NRCMI, New Rural Cooperative Medical Insurance.