Long-Term Safety Outcomes and First-Line Treatment Patterns in Patients With Non-Small Cell Lung Cancer and Programmed Death-1 (Pd-L1) <1%

Inclusion Criteria:Inclusion Criteria: * Are ≥ 18 years of age at the index date * Have a confirmed diagnosis of advanced/metastatic non-small cell lung cancer (NSCLC) (stage IIIB-IV) (squamous and non-squamous) * Have PD-L1\< 1% level as reported * Received one of the following 1L treatments: * Cohort 1: nivolumab + ipilimumab * Cohort 2: nivolumab + ipilimumab + platinum-based chemotherapy * Cohort 3: Immuno-oncology (IO)-based therapy (excluding nivolumab-based regimens) with chemotherapy * Cohort 4: Dual-IO with chemotherapy (eg. tremelimumab-actl + durvalumab + carboplatin + albumin-bound paclitaxel, tremelimumab-actl + durvalumab + \[carboplatin or cisplatin\] + gemcitabine, tremelimumab-actl + durvalumab + carboplatin + albumin-bound paclitaxel, tremelimumab-actl + durvalumab + \[carboplatin or cisplatin\] + pemetrexed) * Have ≥ 6 months of documented post-index (follow-up) period after the index date - Participants who die within 6 months of follow-up will be included Exclusion Criteria: * Have positive or unknown EGFR or ALK mutation before the index date * Have a gap of \> 120 days between metastatic NSCLC diagnosis and index date * Were included in a clinical trial for 1L therapy * Enter a hospice within 6 months of the follow-up will be excluded * Have other concurrent primary cancer diagnoses