Cancer Survival by Stage at Diagnosis in Kuwait: A Population-Based Study

Area of Science:

• Oncology
• Public Health
• Epidemiology

Background:

• Cancer diagnosis stage significantly influences patient survival outcomes.
• Variations in cancer stage distribution and survival rates exist globally.
• Understanding these disparities is key to improving cancer care.

Purpose of the Study:

• To analyze the distribution of cancer diagnosis stages for 12 major cancers in Kuwait.
• To estimate stage-specific net survival rates at 1 and 5 years post-diagnosis.
• To compare stage-specific survival between Kuwait and the United States.

Main Methods:

• Utilized data from the Kuwait Cancer Registry (2000-2013 diagnoses).
• Examined Surveillance Epidemiology and End Results (SEER) Summary Stage distribution.
• Calculated net survival, controlling for background mortality and age-standardizing using International Cancer Survival Standard (ICSS) weights.

Main Results:

• A low percentage of patients (14.2%) were diagnosed at an early, localized stage.
• The proportion of known cancer stages decreased over time (88.9% to 59.4%).
• While stage-specific survival was similar between Kuwait and the US, overall survival was lower in Kuwait for colon, lung, and breast cancers due to late-stage diagnoses.

Conclusions:

• Late-stage diagnosis is a primary driver of lower overall cancer survival in Kuwait compared to the US.
• Enhancing public awareness of cancer symptoms and risk factors is essential.
• Investing in early cancer detection strategies is critical to improve survival rates.