Impact of overtime working and social interaction on the deterioration of mental well-being among full-time workers during the COVID-19 pandemic in Japan: Focusing on social isolation by household composition.

The negative combination of increasing overtime working hours and decreasing social interaction may have an impact on the deterioration of mental well-being during the COVID-19 pandemic, and this association was comparably strong among single-person households. In the pandemic, it is necessary to pay close attention to both overtime working hours and the presence of social interaction to address the mental well-being among employees.