Table 3.
Kaplan-Meier (univariate) analysis considering the most important factors of 5-year survival
| Variable | 5-year survival, n (%) | Median survival, months | 95% CI | p value (log rank test) | |
|---|---|---|---|---|---|
| Gender | |||||
| Male | 29 (43) | 39 | 27.971–50.029 | 0.151 | |
| Female | 35 (31) | 34 | 25.450–42.550 | ||
| Age | |||||
| 81–85 years | 48 (36) | 39 | 29.808–48.192 | 0.048 | |
| 86–90 years | 16 (38) | 38 | 17.888–58.112 | ||
| >90 years | 1 (10) | 24 | 0.0000–59.639 | ||
| Underlying diseases | |||||
| 0–1 | 23 (40) | 56 | 36.040–58.560 | 0.027 | |
| 2 | 29 (34) | 37 | 33.131–40.548 | ||
| 3 | 12 (27) | 30 | 23.135–36.954 | ||
| Operation | |||||
| Radical | 63 (40) | 45 | 35.337–54.663 | 0.0001 | |
| Palliative | 1 (3) | 8 | 4.422–11.578 | ||
| Postoperative morbidity | |||||
| Yes | 19 (34) | 31 | 14.650–47.350 | 0.230 | |
| No | 46 (36) | 39 | 31.926–50.214 | ||
| UICC stage | |||||
| I | 23 (40) | 49 | 22.109–75.891 | 0.0001 | |
| II | 29 (34) | 52 | 35.751–68.249 | ||
| III | 10 (26) | 34 | 24.998–43.002 | ||
| IV | 1 (20) | 8 | 4.897–11.1 | ||
| Histological grade | |||||
| I | 18 (43) | 47 | 24.771–69.229 | 0.085 | |
| II | 36 (34) | 38 | 29.353–46.647 | ||
| III | 10 (26) | 17 | 4.918–29.082 | ||
| Tumor size | |||||
| <20 mm | 14 (47) | 50 | 45.580–54.420 | 0.0001 | |
| 21–50 mm | 40 (42) | 40 | 25.161–54.839 | ||
| >50 mm | 10 (17) | 23 | 11.078–34.922 | ||
| Number of lymph nodes | |||||
| 0 | 47 (42) | 47 | 35.281–58.719 | 0.0001 | |
| 1–3 | 16 (33) | 31 | 18.655–43.345 | ||
| 4–6 | 1 (6) | 15 | 4.679–25.230 | ||
| >6 | 0 (0) | 8 | 0.000–20.002 | ||
| Venous invasion | |||||
| Yes | 2 (4) | 17 | 8.450–25.550 | 0.0001 | |
| No | 62 (48) | 56 | 53.704–58.296 | ||
| Recurrence | |||||
| Yes | 3 (7) | 31 | 22.749–39.251 | 0.0001 | |
| No | 60 (53) | 60 | 57.766–62.234 | ||
CI, confidence interval; UICC, Union for International Cancer Control.