BACKGROUND: Dry eye is a common disease, and coffee is a popular beverage that is heavily consumed in Korea and worldwide. We examined the correlation between coffee consumption and dry eye.METHODS: This study was performed using data from the 5th Korean National Health and Nutrition Examination Survey, which was a cross-sectional study of the Korean population conducted from 24 months. We included adults aged ≥19 years who underwent ophthalmologic examination and excluded those who had comorbid conditions with dry eye. The subjects were divided into dry eye and control groups. The dry eye group consisted of those who had been clinically diagnosed with dry eye. A multiple logistic regression analysis was conducted to determine the correlation between coffee consumption and dry eye.RESULTS: An inverse correlation was found between coffee consumption and dry eye in the group that consumed 3 cups of coffee a day (P=0.001). However, after multivariate adjustment, the statistical significance of the correlation disappeared (P=0.283).CONCLUSION: Consumption of 3 cups of coffee a day in comparison to non-consumption group was negatively correlated with dry eye in an univariate analysis model, but the correlation was not statistically significant after adjusting for age, sex, body mass index, smoking, binge drinking, sun exposure time and history of eye surgery.
Adult ; Beverages ; Binge Drinking ; Body Mass Index ; Coffee ; Cross-Sectional Studies ; Dry Eye Syndromes ; Humans ; Korea ; Logistic Models ; Nutrition Surveys ; Smoke ; Smoking ; Solar System

Background: Coffee is the most commonly consumed beverage worldwide and has a variety of health benefits. However, the relationship between coffee consumption and bone mineral density (BMD) is still controversial. This study aimed to assess the associations between coffee consumption and BMD in Korean men aged 50 years and older. Methods: The study included 271 Korean men aged 50 years and older from the Fourth Korea National Health and Nutrition Examination Survey 2011. Coffee consumption frequency was assessed using a questionnaire and categorized as follows: none, ≤1 cup/day, 2 cups/day, or 3 cups/day. The BMD of the total femur, femur neck, and lumbar spine were compared based on coffee consumption frequency. Multiple logistic regression analysis was used to analyze the association between coffee consumption and impaired bone health (osteopenia or osteoporosis). Results: The BMD of the total femur and femur neck significantly increased with higher coffee consumption (P<0.001). Participants with the highest coffee consumption had the lowest odds ratio for osteopenia or osteoporosis of the total femur and femur neck (P<0.001 and P<0.05, respectively). After adjusting for all confounding factors, this trend remained consistent in the femur neck (P<0.05); drinking 2 cups of coffee per day was found to be associated with the lowest risk of osteopenia or osteoporosis of the total femur. Conclusion Coffee consumption was found to decrease the risk of osteopenia or osteoporosis of the total femur and femur neck in Korean men aged 50 years and older.