TABLE 5.
The number of low- and high-purity samples in different categories.
| Sample size | High_purity ≥ 80% | Low_purity < 70% |
| All(436) | 129 | 127 |
| N0M0(121) | 46 | 31 |
| N + M0(248) | 61 | 80 |
| N + M0-intes(115) | 28 | 40 |
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