Conditional survival in patients with gallbladder cancer

Area of Science:

• Oncology
• Cancer Research
• Survival Analysis

Background:

• Conditional survival (CS) is a clinically relevant prognostic factor for cancer survivors.
• CS in gallbladder (GB) cancer requires further evaluation.
• Accurate survival information for GB cancer patients is crucial.

Purpose of the Study:

• To evaluate cancer-specific CS and cancer-specific survival (CSS) rates in GB cancer patients at multiple time points.
• To identify prognostic factors influencing cancer-specific CS rates.
• To provide more precise survival data for GB cancer survivors.

Main Methods:

• Utilized data from 9760 GB cancer patients (2004-2013) from the SEER database.
• Calculated 3-year cancer-specific CS rates using covariate-adjusted survival functions in Cox models.
• Performed Cox proportional hazards regression to identify prognostic factors for CSS and CS rates.

Main Results:

• The adjusted 5-year CSS rate was 26.1%.
• Adjusted 3-year cancer-specific CS rates at 1, 3, and 5 years post-diagnosis were 55.5%, 81.5%, and 90.5%, respectively.
• At diagnosis, age, race, histology, grade, T, N, M categories, surgery, radiotherapy, insurance, and marriage status were significant prognostic factors. Post-diagnosis, only T and M categories remained significant (P=.007, P=.009).

Conclusions:

• T and M categories are significant prognostic factors for GB cancer survival even 5 years post-diagnosis.
• Local treatments at diagnosis were not significant long-term prognostic factors.
• GB cancer patients at high risk may benefit from adjuvant therapy post-primary treatment.