Table 2.
The relationship between PD-1 and baseline data of patients
| Index | Number (n=87) | PD-1 Negative (n=39) | PD-1 Positive (n=48) | x2 value | P value |
|---|---|---|---|---|---|
| Sex | |||||
| Male | 56 | 27 | 29 | 0.728 | 0.393 |
| Female | 31 | 12 | 19 | ||
| Age | |||||
| ≤ 60 years old | 31 | 16 | 15 | 0.896 | 0.343 |
| > 60 years old | 56 | 23 | 33 | ||
| Largest diameter of lesion | |||||
| ≤ 3 cm | 22 | 8 | 14 | 0.852 | 0.355 |
| > 3 cm | 65 | 31 | 34 | ||
| TNM stage | |||||
| Stage II | 17 | 7 | 12 | ||
| Stage IIIA | 27 | 15 | 12 | 1.934 | 0.380 |
| Stage IIIB | 43 | 17 | 24 | ||
| Origin location | |||||
| Neck segment | 14 | 7 | 7 | ||
| Upper segment | 13 | 6 | 7 | 5.519 | 0.137 |
| Middle segment | 29 | 17 | 12 | ||
| Lower segment | 31 | 9 | 22 |
Note: TNM = Tumor Node Metastasis, PD-1 = Programmed death-1.