| Item | Category | Control group (n = 50) | Observation group (n = 50) | t/χ2 | P |
| Age (years) |
| 51.780 ± 10.829 | 50.220 ± 10.100 | −0.745 | 0.458 |
| Gender | Male | 18 | 17 | 0.044 | 0.834 |
| Female | 32 | 33 |
|
| |
| Education level | Primary school | 5 | 5 | 3.382 | 0.848 |
| Junior high school | 7 | 8 |
|
| |
| High school | 15 | 10 |
|
| |
| Junior college or above | 23 | 27 |
|
| |
| Course of disease (year) |
| 1.899 ± 0.748 | 1.791 ± 0.586 | −0.804 | 0.424 |
| TNM staging | 0 | 2 | 2 | 4.174 | 0.124 |
| 1 | 44 | 48 |
|
| |
| 2 | 4 | 0 |
|
| |
| Maximum tumor diameter (cm) |
| 13.780 ± 7.291 | 13.980 ± 7.852 | 0.132 | 0.895 |
| Surgical site | Left side | 20 | 21 | 0.041 | 0.839 |
| Right side | 30 | 29 |
|
|