Association between Caffeine-containing Nutritional Drink Consumption and Rest through Sleep

Comparison by Work Type among Nursing Home Employees

Abstract

This study aimed to examine the relationship between caffeine-containing nutritional drink consumption and rest through sleep for employees working in long-term care facilities based on their work type. A self-administered survey was administered to long-term care facility employees, and responses were obtained from 607 participants. The dependent variable was “I get enough rest from sleep,” and the independent variables were face sheet, work type (day-shift only/shift work), hours of sleep, lifestyle (consumption of nutritional drinks containing caffeine, etc.), stress check recommended by the Ministry of Health, Labor, and Welfare, and support from the surrounding community. The independent variables were used for logistic regression analysis, which revealed the relationship between the day-shift-only group and being well-rested in terms of sleep, less consumption of caffeine-containing nutritional drinks, longer average hours of sleep, physical and mental stress in the stress check, and less frequent drinking of alcohol. High caffeine-containing nutritional drink consumption and long average hours of sleep were associated with the shift work group. However, further research should clarify causal relationships because of the cross-sectional study design.