Advancing Precision Lung Cancer Surveillance and Outcomes in Diverse Populations

Inclusion Criteria: * Adults diagnosed with primary, pathologically confirmed stage I-IIIA non- small cell lung cancer (NSCLC). * Received curative-intent therapy, including: Surgical resection, or Stereotactic body radiation therapy (SBRT), with or without adjuvant therapy. * Completed curative-intent therapy and survived at least 5 months after therapy initiation. * Received care within the University of Florida (Gainesville or Jacksonville) health system, and are included in the OneFlorida+ clinical data network. * Have available: Structured EHR data (including tumor registry linkage, imaging, procedures, and vital statistics), and Unstructured clinical documents (clinic notes, radiology reports, pathology reports) enable NLP extraction. \- Have ≥1 follow-up encounter in the EHR after treatment completion to allow surveillance assessment. Exclusion Criteria: * Histology other than NSCLC, including: Small-cell lung cancer Carcinoid tumors Rare non-NSCLC primary tumors * Metastatic disease (stage IV) at diagnosis. * No curative-intent therapy received (e.g., palliative treatment only). * Patients with incomplete treatment records prevent the determination of the treatment completion date. * Patients with no surveillance-relevant follow-up data, including: No post-treatment clinical notes No radiology/pathology records No linked tumor registry or vital status data * Patients with recurrence or who die within the first 5 months after starting curative-intent therapy (insufficient window for guideline-defined surveillance). * Patients with missing identifiers prevent linkage to cancer registries or the death index. * Individuals whose imaging cannot be classified as surveillance vs. diagnostic due to the absence of relevant structured or unstructured data.