Table 1. Patient characteristics.
| Project | Experimental group (n=52), n (%) | Control group (n=47), n (%) | t/χ2 | P |
|---|---|---|---|---|
| Disease course, years | 0.251 | 0.882 | ||
| <10 | 28 (53.8) | 24 (51.1) | ||
| 10–20 | 9 (17.3) | 10 (21.3) | ||
| >20 | 15 (28.8) | 13 (27.7) | ||
| Gender | 0.017 | 0.896 | ||
| Female | 15 (28.8) | 13 (27.7) | ||
| Male | 37 (71.2) | 34 (72.3) | ||
| Smoke history | 0.007. | 0.932 | ||
| Yes | 25 (48.1) | 23 (48.9) | ||
| No | 27 (51.9) | 24 (51.1) | ||
| Age, years | 0.09 | 0.946 | ||
| ≤60 | 6 (11.5) | 5 (10.6) | ||
| 61–74 | 21 (40.4) | 18 (38.3) | ||
| ≥75 | 25 (48.1) | 24 (51.1) | ||
| Education | 1.871 | 0.392 | ||
| Elementary school | 29 (55.8) | 29 (61.7) | ||
| Middle school | 17 (32.7) | 16 (34.0) | ||
| High school or above | 6 (11.5) | 2 (4.3) | ||