Table 1. Patient and demographic characteristics according to treatment groups.
| Treatment group, n (%) | Total, n (%) | |||
| Surgery + RT | Surgery alone | P value | ||
| Age | 0.999 | |||
| ≤65 years | 77 (68.8) | 308 (68.8) | 385 (68.8) | |
| >65 years | 35 (31.5) | 140 (31.3) | 175 (31.3) | |
| Gender | 0.766 | |||
| Male | 84 (75.0) | 342 (76.3) | 426 (76.1) | |
| Female | 28 (25.0) | 106 (23.7) | 134 (23.9) | |
| Hypertension | 0.464 | |||
| Yes | 31 (27.7) | 109 (24.3) | 140 (25.0) | |
| No | 81 (72.3) | 339 (75.7) | 420 (75.0) | |
| Diabetes mellitus | 0.819 | |||
| Yes | 19 (17.0) | 72 (16.1) | 91 (16.3) | |
| No | 93 (83.0) | 376 (83.9) | 469 (83.8) | |
| CAD* | 0.341 | |||
| Yes | 11 (9.8) | 32 (7.1) | 43 (7.7) | |
| No | 101 (90.2) | 416 (92.9) | 517 (92.3) | |
| Atrial fibrillation | 0.885 | |||
| Yes | 1 (0.9) | 3 (0.7) | 3 (0.5) | |
| No | 111 (99.1) | 445 (99.3) | 557 (99.5) | |
| Geographic region | 0.926 | |||
| Northern | 44 (39.3) | 187 (41.7) | 231 (41.3) | |
| Central | 27 (24.1) | 111 (24.8) | 138 (24.6) | |
| Southern | 39 (34.8) | 144 (32.1) | 183 (32.7) | |
| Eastern | 2 (1.8) | 6 (1.3) | 8 (1.4) | |
| Urbanization level | 0.776 | |||
| Urban | 26 (23.2) | 109 (24.3) | 135 (24.1) | |
| Suburban | 42 (37.5) | 152 (33.9) | 194 (34.6) | |
| Rural | 44 (39.3) | 187 (41.7) | 231 (41.3) | |
| Total | 112 (100.0) | 448 (100.0) | 560 (100.0) | |
Abbreviation: RT, radiotherapy; CAD, coronary artery disease.
Note 1: All above factors were used for propensity-score match to balance study groups.
Note 2: All P values were calculated by using chi-square test.