Correlation analysis between bladder cancer and cigarette smoking in various countries

Area of Science:

• Epidemiology
• Oncology
• Public Health

Background:

• Cigarette smoking is a known risk factor for bladder cancer.
• Global variations in bladder cancer mortality rates exist, with higher rates observed in European countries compared to Asian countries.

Purpose of the Study:

• To investigate the relationship between bladder cancer mortality rates and cigarette smoking prevalence across different countries.
• To determine if smoking prevalence alone can account for the observed differences in bladder cancer mortality rates.

Main Methods:

• Analysis of age-adjusted bladder cancer mortality rates and cigarette smoking prevalence data from various countries.
• Correlation analysis was performed, initially across 20 countries, and then restricted to 16 Caucasian-predominant countries in Europe, North America, and Oceania.

Main Results:

• No significant correlation was found between bladder cancer mortality and smoking prevalence in a global analysis of 20 countries.
• A strong positive correlation was observed in Caucasian populations (Europe, North America, Oceania): 0.68 for males and 0.49 for females.
• In Japan and the US, male bladder cancer incidence increased as smoking prevalence decreased, while rates remained stable in females.

Conclusions:

• Cigarette smoking prevalence does not solely explain global bladder cancer mortality disparities.
• Race appears to be a significant risk factor for bladder cancer, potentially more so than smoking prevalence.
• Long-term monitoring of bladder cancer incidence rates is crucial for accurately assessing the impact of smoking cessation efforts.