Table 1.
Comparison of continuous features between Japanese dataset and Western datasets
| Feature | Training set | Validation set | p Value | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MSKCC (n = 189) | Scandinavia (n = 815) | Italy (n = 287) | Japan (n = 261) | |||||||
| % of missing data | % of missing data | % of missing data | versus Scandinavian | versus Italian | versus MSKCC | |||||
| Age at surgery (years) | ||||||||||
| Mean | 62.4 | 66.4 | 0.0 | 63.1 | 0.0 | 61.8 | 0.0 | < 0.001 | 0.608 | 0.959 |
| SD | 13.7 | 12.7 | 11.7 | 12.3 | ||||||
| Hemoglobin concentration (mg/dL) | ||||||||||
| Mean | 11.5 | 11.5 | 0.0 | 11.5 | 10 | 12.4 | 0.0 | 0.004 | 0.045 | 0.062 |
| SD | 1.9 | 3.5 | 1.4 | 6.0 | ||||||
| Absolute lymphocyte count (K/μL) | ||||||||||
| Mean | 1.2 | 1.2 | 84.8 | 1.3 | 22.7 | 1.3 | 1.2 | 0.999 | 0.775 | 0.042 |
| SD | 1.3 | 0.74 | 0.5 | 0.9 | ||||||
| Surgeon’s estimate of survival (months) | ||||||||||
| Mean | 10.3 | 11.8 | 0.0 | 11.2 | 86.8 | 8.9 | 49.0 | 0.171 | 0.847 | 0.768 |
| SD | 8.6 | 17.2 | 7.0 | 4.6 | ||||||
MSKCC = Memorial Sloan Kettering Cancer Center.