Table 2.
Clinical characteristics of the high risk and low risk groups.
| Clinical indicatorsa | High risk (n = 211) | Low risk (n = 211) | p value for chi-square testsb |
|---|---|---|---|
| Age | 0.254 | ||
| ≥ 65 years | 113 (53.6) | 125 (59.2) | |
| < 65 years | 97 (46.0) | 84 (39.8) | |
| Missing | 1 (0.5) | 2 (0.9) | |
| Sex | 1.000 | ||
| Male | 138 (65.4) | 137 (64.9) | |
| Female | 73 (34.6) | 74 (35.1) | |
| AJCC TNM stage | 0.011 | ||
| Stage I | 18 (8.5) | 39 (18.5) | |
| Stage II | 67 (31.8) | 70 (33.2) | |
| Stage III | 91 (43.1) | 82 (38.9) | |
| Stage IV | 26 (12.3) | 15 (7.1) | |
| Stage x or missing | 9 (4.3) | 5 (2.4) | |
| T | 0.011 | ||
| T1 | 5 (2.4) | 17 (8.1) | |
| T2 | 42 (19.9) | 52 (24.6) | |
| T3 | 95 (45.0) | 95 (45.0) | |
| T4 | 66 (31.3) | 46 (21.8) | |
| Tx or missing | 3 (1.4) | 1 (0.5) | |
| N | 0.132 | ||
| N0 | 52 (24.6) | 73 (34.6) | |
| N1 | 62 (29.4) | 60 (28.4) | |
| N2 | 43 (20.4) | 43 (20.4) | |
| N3 | 46 (21.8) | 33 (15.6) | |
| Nx or missing | 8 (3.8) | 2 (0.9) | |
| M | 0.138c | ||
| M0 | 182 (86.3) | 195 (92.4) | |
| M1 | 17 (8.1) | 9 (4.3) | |
| Mx or missing | 12 (5.7) | 7 (3.3) |
aData are presented as the number (%), AJCC: American Joint Committee on Cancer, T: tumor status, N: regional lymph node status, M: metastasis status.
bData containing missing values were not included in the statistical analysis.
cChi-square test with Yates' continuity correction.