Table 1.
Demographic data of the two groups
| Patient group | Healthy comparison group | F or χ 2 | p | |
|---|---|---|---|---|
| (n = 247) | (n = 362) | |||
| Age (years) | 47.45 ± 7.43 | 46.59 ± 7.57 | 1.911 | 0.167 |
| Years of schooling | 9.77 ± 3.42 | 9.53 ± 3.43 | 0.713 | 0.399 |
| Educational level (%) | 1.021 | 0.796 | ||
| Primary school | 19.8 | 20.2 | ||
| Junior high school | 47.0 | 43.6 | ||
| Senior middle school | 17.0 | 19.9 | ||
| College and above | 16.2 | 16.3 | ||
| Residence (%) | 0.097 | 0.755 | ||
| Urban | 40.5 | 39.2 | ||
| Rural | 59.5 | 60.8 | ||
| Marital status (%) | 2.670 | 0.263 | ||
| Married | 89.5 | 93.1 | ||
| Widowed | 3.2 | 2.5 | ||
| Divorced | 7.3 | 4.4 | ||
| Employment status (%) | 9.875 | 0.007 | ||
| Employed | 77.3 | 74.3 | ||
| Housewife | 15.4 | 10.8 | ||
| Retired | 7.3 | 14.9 |