A new study, primarily led by La Trobe University, indicates that a reduction in annual per-person alcohol consumption in Australia could significantly decrease deaths from several alcohol-related cancers. The research, which analyzed over 70 years of national data, suggests that a one-litre reduction in pure alcohol consumption per person annually could lower mortality rates for specific cancers, with effects particularly noticeable among individuals aged 50 and older.
Study Methodology and Scope
Published in the British Journal of Cancer, the study utilized more than 70 years of national data encompassing mortality rates, alcohol and tobacco consumption, and health expenditure. Researchers from La Trobe University, the University of Melbourne, and Curtin University, among other partner institutions, employed advanced time-series modelling techniques. The aim was to examine the long-term association between population-level alcohol consumption and deaths from four key alcohol-related cancers: upper aerodigestive tract (UADT), liver, colorectal, and female breast cancer. Associate Professor Jason Jiang, the lead author from La Trobe's Department of Public Health and Centre for Alcohol Policy Research (CAPR), noted that this study represents the first to analyze these associations in Australia using long-term aggregate data.
Key Findings on Alcohol's Impact
The study's findings highlighted long-term alcohol exposure as a causal factor for a notable proportion of specific cancer deaths:
- Approximately 45% of male UADT cancer deaths
- Approximately 21% of female UADT cancer deaths
- Approximately 48% of male liver cancer deaths
- Approximately 15% of male colorectal cancer deaths and 4% for females
- Approximately 14% of female breast cancer deaths
These estimates were reported to be higher than those from previous Australian studies, which researchers attributed to reflecting the cumulative effects of decades of drinking. The most significant alcohol-related cancer impacts were observed in individuals aged 50 years and older. The study also noted that without preventive actions, alcohol-related cancer deaths could increase due to Australia's ageing population and higher drinking rates among older age groups.
Potential Mortality Reductions
The research modeled that a one-litre reduction in per-person annual pure alcohol consumption, an amount equivalent to approximately 2.5 one-litre bottles of spirits, could lead to the following estimated reductions in alcohol-related cancer deaths:
- 3.6% fewer UADT cancer deaths in men and 3.4% fewer in women
- 3.9% fewer male liver cancer deaths
- 1.2% fewer male colorectal cancer deaths and 0.7% fewer in women
- 2.3% fewer female breast cancer deaths
These potential reductions represent an overall decrease of up to 4% across the identified cancers.
Policy Considerations and Health Guidelines
Researchers suggest that policy interventions aimed at reducing population-wide alcohol consumption could result in substantial reductions in cancer mortality. These interventions include alcohol taxation, regulating availability, and limiting alcohol advertising.
The study referenced the Australian Guidelines to Reduce Health Risk from Drinking Alcohol, which advise limiting consumption to no more than 10 standard drinks per week and no more than four standard drinks on any single day to mitigate lifetime health risks. While the World Health Organization (WHO) indicates there is no safe level of alcohol consumption for cancer risk, adhering to established drinking guidelines is noted to considerably reduce the risk of developing alcohol-related cancers, alongside other conditions such as cardiovascular diseases and mental disorders.