Alcohol consumption modifies the total lung capacity in smokers

Area of Science:

• Pulmonary Medicine
• Nutritional Science
• Epidemiology

Background:

• Smoking is a primary cause of airflow obstruction and emphysema.
• Emphysema, characterized by lung tissue destruction, can occur independently of airflow obstruction.
• Alcohol consumption has been hypothesized to influence smoking-related emphysema risk.

Purpose of the Study:

• To investigate the impact of total energy and nutrient intake, including alcohol, on smoking-related emphysema.
• To determine if specific dietary components modify the relationship between smoking and lung function.

Main Methods:

• A population-based study of 478 men aged 68 years ('Men Born in 1914' cohort in Malmö, Sweden).
• Assessment of lung function (including total lung capacity - TLC) and detailed nutrient intake, including alcohol consumption.
• Statistical analysis to explore correlations between nutrient intake, smoking status, and lung function parameters.

Main Results:

• No significant associations were found between nutrient intake and lung function in non-smokers and ex-smokers.
• In current smokers, men in the highest and lowest quintiles of TLC differed significantly in alcohol intake.
• Among smokers with airflow obstruction (FEV1/VC < 70%), alcohol intake showed a positive correlation with TLC (r=0.31, p=0.006) after adjustments.

Conclusions:

• In male smokers experiencing airway obstruction, emphysema (defined by large TLC) is associated with higher alcohol consumption.
• Total energy intake and other macronutrients (protein, fat, carbohydrate) were not significantly linked to smoking-related emphysema in this cohort.
• Findings suggest a potential role for alcohol in the pathogenesis or manifestation of emphysema in male smokers with airway obstruction.