Table 2. Characteristic data from different study cohorts.
| Study cohort at baseline*1 (n = 5248) | Potential participants*2 (n = 2366) | OVIS participants (n = 1927) | |
| Age at diagnosis in years (Mean ± SD) | 60.7 ± 12.1 | 59.6 ± 11.7 | 58.8 ± 11.3 |
| Dwelling category | |||
| City | 47.7% | 51.1% | 51.4% |
| Country | 51.9% | 48.9% | 48.6% |
| Tumor, node, metastasis T (tumor) | |||
| T1 | 48.5% | 51.3% | 54.6% |
| T2 | 34.4% | 35.8% | 35.4% |
| T3 | 4.8% | 4.6% | 4.8% |
| T4 | 6.9% | 4.4% | 3.6% |
| Unknown | 5.4% | 3.9% | 1.4% |
| Tumor, node, metastasis N (regional lymph nodes) | |||
| N0 | 53.8% | 58.8% | 62.0% |
| N1 | 30.4% | 30.5% | 30.7% |
| N2 | 3.7% | 3.5% | 3.5% |
| N3 | 0.4% | 0.1% | – |
| Unknown | 11.8% | 7.0% | 3.9% |
| Tumor, node, metastasis M (distant metastases) | |||
| M0/Unknown | 95.2% | 97.1% | 97.5% |
| M1 | 4.8% | 2.9% | 2.5% |
*1Inclusion criteria apply, reported by name or anonymously;*2 Inclusion criteria apply, reported by name, corresponds to eligible patients, SD; standard deviation.