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Conditional Survival in Uveal Melanoma
Emily C Zabor1, Tomas Radivoyevitch1, Arun D Singh2
1Department of Quantitative Health Sciences & Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio.
Ophthalmology. Retina
|September 26, 2020
Summary
Conditional survival estimates for uveal melanoma patients significantly improve over time. Patients surviving 5 years post-diagnosis have high 10-year conditional survival rates, offering valuable guidance for patient counseling.
Area of Science:
- Ophthalmology
- Oncology
- Biostatistics
Background:
- Uveal melanoma is a rare primary eye cancer.
- Accurate prognostic indicators are crucial for patient management and counseling.
- Conditional survival analysis offers a dynamic approach to estimating prognosis.
Purpose of the Study:
- To investigate conditional survival in patients diagnosed with uveal melanoma in the United States.
- To evaluate how survival probabilities change over time after diagnosis.
- To provide updated survival estimates for uveal melanoma patients.
Main Methods:
- A retrospective cohort study using the Surveillance, Epidemiology, and End Results (SEER) database (SEER 18) from 1975-2011.
- Identified 6863 uveal melanoma cases using ICD-O-3 codes.
- Estimated metastasis-free survival (MFS) and overall survival (OS) using Kaplan-Meier, and calculated conditional MFS (cMFS) and conditional OS.
Main Results:
- The nonconditional 5-year MFS was 80%. Conditional 5-year MFS increased from 82% to 96% after surviving 1 to 4 years.
- The nonconditional 10-year MFS was 69%. Conditional 10-year MFS increased from 87% to 98% after surviving 5 to 9 years.
- Conditional survival estimates consistently improved with longer survival post-diagnosis, confirmed by relative survival analysis.
Conclusions:
- Conditional survival estimates for uveal melanoma improve significantly as time since diagnosis increases.
- Patients surviving at least 5 years demonstrate high conditional 10-year survival rates.
- Conditional survival analysis provides valuable, time-dependent prognostic information for patient counseling.
