2.2. Data Selection Criteria
tumor
TUMOR
The following methods were used to extract KTSCC patients from the SEER database: The inclusion criteria: primary sites codes: “C01.9,” “C02.0,” “C02.1,” “C02.2,” “C02.3,” “C02.4,” “C02.8,” and “C02.9;” ICD-0-3 Hist/behave codes: 8071/3. Data from 2004 to 2015. A total of 5218 KTSCC patients were screened out using the above inclusion criteria. However, 680 patients were excluded because of unknown tumor size, 372 due to unclear AJCC stage, 263 due to unknown marital status, and 29 due to duplicate patient IDs. Finally, 3874 patients with KTSCC were included, who were randomly divided into the training (70%, 