Longitudinal associations between informal caring, social network, and psychological distress among adolescents and young adults: modelling within-person effects.

Background: Informal caring is associated with mental health deterioration among young people and impacts their help-seeking ability. Social network can provide social support and mitigate the impact of informal care. However, young carers may avoid identification and withdraw from social networks.

Exploring the relationship between personal and cohabiting family members' COVID-19 infection experiences and fear of COVID-19: a longitudinal study based on the Japan COVID-19 and Society Internet Survey (JACSIS).

Objectives: This study aims to explore the relationship between the combined experiences of COVID-19 infection in individuals and their family members and the resulting fear of COVID-19, with a focus on the severity of symptoms and various sociodemographic factors.

Design: Longitudinal survey study.

Setting: The Japan COVID-19 and Society Internet Survey (JACSIS), a large-scale web panel survey administered in Japan.

Nicotine dependence based on the tobacco dependence screener among heated tobacco products users in Japan, 2022-2023: The JASTIS study.

Heated tobacco products (HTPs) are nicotine-containing products similar to cigarettes and are widely used in Japan. However, there has been insufficient research on nicotine dependence associated with HTP use. This study investigated the association of the types of individuals who smoked with the prevalence of nicotine dependence.

Association of remote work with tobacco and alcohol use: a cross-sectional study in Japan.

Background: Remote work allows one to work free from workplace policy, but it may negatively affect health-related behaviors such as tobacco product use and alcohol drinking. Our study aimed to investigate the association of remote work with tobacco dependence and hazardous alcohol use.

Methods: This nationwide Internet-based survey was conducted in Japan in February 2023.

Correlates of COVID-19 conspiracy theory beliefs in Japan: A cross-sectional study of 28,175 residents.

Background: The COVID-19 pandemic was associated with an increase in conspiracy theories worldwide. However, in Japan, the prevalence of COVID-19 conspiracy beliefs has remained unclear. This study aimed to estimate the prevalence and correlates of COVID-19 conspiracy beliefs using a survey of 28,175 residents of Japan aged 16-81 years old.