Retrospective Assessment of AE-Related Healthcare Resource Utilization and Costs of Immune Checkpoint Inhibitor and Targeted Therapy for Adjuvant Treatment of Melanoma

Inclusion Criteria: * Patients with at least one diagnosis of malignant melanoma of skin (The International Classification of Diseases, 9th Revision, Clinical Modification \[ICD-9\] codes: 172.0-172.9 or V10.82; ICD-10 (10th revision) codes: C43.0 C43.10, C43.11, C43.111, C43.112, C43.12, C43.121, C43.122, C43.20, C43.21, C43.22, C43.30 C43.31 C43.39 C43.4, C43.51, C43.52, C43.59 C43.60, C43.61, C43.62, C43.70, C43.71, C43.72, C43.8 C43.9 D03.0 D03.10 D03.11, D03.111, D03.112, D03.12, D03.121, D03.122, D03.20 D03.21 D03.22 D03.30 D03.39 D03.4 D03.51 D03.52 D03.59 D03.60 D03.61 D03.62 D03.70 D03.71 D03.72 D03.8 D03.9 Z85.820) anytime from the start of data collection until the start of study period. * Patients with a procedure of first lymph node dissection or nodal basin ultrasound surveillance, per the National Comprehensive Cancer Network (NCCN) guidelines version 2.2020. The first lymph node dissection / nodal basin ultrasound surveillance signified that the patient was eligible to receive systemic treatment as adjuvant therapy. * The first lymph node dissection or nodal basin ultrasound surveillance (index adjuvant date) must have had a diagnosis of malignant melanoma of skin within 6 months, to ensure that the dissection was related to melanoma. * Patients with at least pharmacy or medical claim for the study drugs within 1 year on and after index date. The index date was the date of first prescription of study drug, IO (i.e., nivolumab, ipilimumab + nivolumab, pembrolizumab) or dabrafenib + trametinib. * At least 18 years of age at the time of adjuvant treatment initiation. * Patients with at least 6 months of continuous enrollment prior to the index date. * Patients with at least 6 months of continuous enrollment after the index date. Exclusion Criteria: * Patients with a diagnosis of non-melanoma primary malignancy (ICD-9: 140.xx-165.xx, 170.xx-171.xx, 173.xx-195.xx, 200.xx-208.xx; ICD-10: C00.x - C14.x, C41.x, C49.x, C50, C51) during the 6 months pre-index period. * Patients with chemotherapy or interferon alpha before index date. * Patients with pregnancy (ICD-9: 630.xx-679.xx, V22.xx-V24.xx, V27.xx-V28.xx; ICD-10: O00 - O99) any time during the study period.