Review Article
Prognostic Models for Predicting Overall Survival in Patients with Primary Gastric Cancer: A Systematic Review
Table 4
Characteristics of models with external validation and those without.
| | Externally validated models (n = 20) mean (SD) | Not externally validated models (n = 81) mean (SD) | value |
| Training sample size | 3902.55 (5777.62) | 634.17 (926.30) | 0.021 | Number of events | 2825.12 (4069.04) | 344.75 (613.35) | 0.028 | Number of candidate predictors | 75.80 (204.53) | 12.83 (28.26) | 0.185 | EPV | 364.21 (542.04) | 44.70 (82.97) | 0.033 | Number of final predictors | 6.65 (3.44) | 5.94 (6.08) | 0.490 | Length of follow-up (month) | 64.24 (29.65) | 43.76 (19.15) | 0.122 | Age | 63.00 (4.99) | 59.87 (3.39) | 0.034 | Male% | 64.92 (4.10) | 67.29 (6.54) | 0.053 | c statistic | 0.80 (0.06) | 0.75 (0.07) | 0.042 |
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EPV: event per variable.
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