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Objectives This study aimed to examine whether a high score on the euthymia scale (ES) predicts a low incidence of depressive symptoms one year later. Methods The baseline online survey was conducted in February 2020, and a follow-up survey was done in February 2021. Japanese over 20 years old were enrolled. Respondents who answered both baseline and follow-up, and without depressive symptoms at baseline were included in the analysis. The euthymia scores at baseline was measured by the 10 items of the Japanese version of the ES. Depressive symptoms at follow-up were determined if participants showed either depressive feelings or anhedonia. The odds ratio (OR) was calculated using multivariate logistic regression analysis, adjusting for age, gender, marital status, educational attainment, and clinical visit for depressive episode before the baseline survey. Results The total of 624 participants were analyzed. A total of n = 63 (10.1%) presented depressive symptom at follow-up. A high ES score significantly predicted a lower incidence of depressive symptoms, after adjusting for covariates (aOR = 0.81 [95% confidence interval: 0.72–0.89]). Using the cutoff score retrieved from this data, a high ES score (7 or more) showed the same tendency, compared to a low ES score (< 7) (aOR = 0.46 [0.25–0.83]). Conclusions This study suggests the predictive usefulness of euthymia for subsequent depressive symptoms. Further investigation is needed by employing rigid diagnostic criteria.

Evidence demonstrating the association of preexisting psychiatric disorders with post-COVID-19 is limited. We aim to investigate the association using larger sample sizes and more extended postinfection periods than previous studies. A total of 6015 (response rate = 77.5%) COVID-19 survivors were surveyed using a self-administered questionnaire from July to September 2021. Poisson regression analysis with robust error variance was performed to estimate post-COVID-19 prevalence ratios (PRs) with or without preexisting psychiatric disorders. Participants with preexisting psychiatric disorders numbered 1067 (17.7%), and with post-COVID-19 were 2149 (35.7%). Post-COVID-19 PR with preexisting psychiatric disorders was 1.09 (95% CI 1.02–1.18, p = 0.013). The interaction between preexisting psychiatric disorders and postinfection periods was significant (p for interaction < 0.001). The subgroup analysis showed that those with preexisting psychiatric disorders might be at greater prolonged risk of post-COVID-19 than those without the disorders. These findings suggested that preexisting psychiatric disorders were associated with an increased post-COVID-19 risk, and post-COVID-19 with preexisting psychiatric disorders might prolong even if time passes.

Objectives This study aimed to examine whether having adverse childhood experiences (ACEs) was associated with living in a deprived area in adulthood. Methods The cross-sectional study was conducted by using nation-wide data in 2022 of the Japan COVID-19 and Society Internet Survey (JACSIS). Participants were community dwelling people 18 years or older. ACEs were assessed by Japanese version of 15-items ACE measurement tool (ACE-J). Living condition was measured by Area Deprived Index (ADI) and Densely Inhabited District (DID) based on zip code. Multivariable logistic regression to analyze the associations between ADI and ACE 4 + was conducted, controlling for individual-level factors, such as age, sex, marital status, and education, as an additional analysis. Results The total of 27,916 participants were included in the analysis. The prevalence of emotional neglect, childhood poverty, and school bullying were 38.2%, 26.5%, 20.8%, respectively. 75% of the population had one or more ACE(s). The number of ACEs was associated with significantly higher risk of living in deprived area in the adulthood ( p  = 0.001). ACEs were not associated with living in density area. The association between ADI and ACEs 4 + was non-significant after controlling the individual-level factors. Conclusion People with higher number of ACEs tend to live in deprived areas in adulthood. Policy makers in highly deprived areas can apply the trauma-informed approach for the community care and support, which is critical to mitigating deficit perspectives and facilitating comprehensive support for those with ACEs.

The study aimed to examine the association of expanded adverse childhood experiences (ACEs) with psychological distress in adulthood. The data from nation-wide online cohort was used for analysis. Community dwelling adults in Japan were included. The ACEs was assessed by 15 items of ACE-J, including childhood poverty and school bullying. Severe psychological distress was determined as the score of Kessler 6 over 13. Multivariable logistic regression analysis was conducted, by using sample weighting. A total of 28,617 participants were analyzed. About 75% of Japanese people had one or more ACEs. The prevalence of those with ACEs over 4 was 14.7%. Those with ACEs over 4 showed adjusted odds ratio = 8.18 [95% CI 7.14–9.38] for severe psychological distress. The prevalence of childhood poverty was 29% for 50–64 year old participants and 40% of 65 or older participants. The impact of childhood poverty on psychological distress was less than other ACEs in these age cohorts. Bullying was experienced 21–27% in young generations, but 10% in 65 or older participants. However, the impact on psychological distress in adulthood was relatively high in all age groups. ACEs have impacted mental health for a long time. Future research and practice to reduce ACEs are encouraged.

Background Restless legs syndrome (RLS) with insomnia is presumed to be associated with antenatal depression. RLS without insomnia, however, has not been investigated in association with antenatal depression. We aimed to examine whether RLS without insomnia during pregnancy is associated with antenatal depressive symptoms. Methods This cross-sectional study used data from a randomized controlled trial (RCT) assessing antenatal depressive symptoms among Japanese pregnant women. The participants were 2,108 women who attended the RCT at 16–20 weeks of pregnancy. RLS, insomnia, and antenatal depressive symptoms were assessed using the Cambridge-Hopkins questionnaire short form, Insomnia Severity Index, and Edinburgh Postnatal Depression Scale, respectively. Associations of antenatal depressive symptoms with RLS and insomnia were examined using logistic regression analysis, adjusting for age, partner, education, children, and planned pregnancy. Results Of the total participants, 206 (9.8%) had antenatal depressive symptoms; 80 (3.8%) had RLS. The mean age (standard deviation) was 30.4 (4.6) years. RLS was positively associated with antenatal depressive symptoms: the odds ratio was 2.30 (95% confidence interval, 1.28–4.16). RLS without insomnia was positively associated with antenatal depressive symptoms, as well as insomnia without RLS and RLS with insomnia: the odds ratio was 2.44 (95% confidence interval, 1.09–5.46) for RLS without insomnia, 3.83 (2.78–5.28) for insomnia without RLS, and 5.80 (2.42–13.92) for RLS with insomnia, compared to neither RLS nor insomnia. Conclusions We observed the positive association between RLS without insomnia and antenatal depressive symptoms, suggesting the importance of assessing and treating RLS without insomnia during pregnancy for the reduction of antenatal depressive symptoms.

Little is known about the nationwide epidemiology of the annual rate, causative substance, and clinical course of overdose-related admission. We aimed to describe the epidemiology of overdose episodes from the period prior to hospitalization for drug poisoning until discharge to home. We assessed all cases of admission due to overdose (21,663 episodes) in Japan from October 2012 through September 2013 using the National Database of Health Insurance Claims and Specific Health Checkups of Japan. The annual rate of overdose admission was 17.0 per 100,000 population. Women exhibited two peaks in admission rates at 19–34 years (40.9 per 100,000) and ≥75 years (27.8 per 100,000). Men exhibited one peak in the admission rate at ≥75 years (23.7 per 100,000). Within 90 days prior to overdose, ≥60% and ≥9% of patients aged 19–49 years received a prescription for benzodiazepines and barbiturates, respectively. In addition, 59% of patients aged ≥75 years received a prescription for benzodiazepines prior to overdose, 47% had a history of congestive heart failure, and 24% had a diagnosis of poisoning by cardiovascular drugs. The proportion of patients with recent psychiatric treatments decreased with age (65.1% in those aged 35–49 years and 13.9% in those aged ≥75 years). The findings emphasize the need for overdose prevention programs that focus on psychiatric patients aged 19–49 years who are prescribed benzodiazepines or barbiturates and on non-psychiatric patients aged ≥75 years who are prescribed benzodiazepines or digitalis. •Benzodiazepines were prescribed to ≥59% of overdose patients aged ≥19 years.•Cardiovascular drugs were frequently ingested among overdose patients aged ≥75 years.•The proportions of patients with recent psychiatric treatments decreased with age.•Overdose prevention should be optimized according to the age-related differences.

Personal values developed in adolescence may influence mental health and well-being over the life course. Using data from 684 respondents in the Youth Development Study (61.9% of respondents in the baseline survey), we explored the effects of work values at ages 14–15 on positive and negative emotions, as well as psychological resources (self-esteem and mastery), at ages 37–38. We adjusted for socioeconomic status and the baseline scores of these outcomes using linear regression analyses. Having the work value of getting ahead in adolescence was positively associated with self-esteem in adulthood. Work values in adolescence did not predict positive emotions, negative emotions, or mastery in adulthood. Valuing one’s growth in adolescence may help develop self-esteem in adulthood.

Objectives Association between employment contract (temporary vs. permanent) and suicidal ideation (persistent suicidal ideation [i.e., with onset before COVID‐19] or newly developed under COVID‐19 pandemic) was examined using a nationally representative cross‐sectional study in Japan. Methods An Internet survey was conducted from August to September 2020. The participants’ inclusion criteria for this study were as follows: (i) 20–65 years old, (ii) employees (excluding self‐employed, students, retired, housewives, and unemployed). The associations of suicidal ideation with the employees’ factors were analyzed using the multinomial logistic regression model, adjusting for covariates (sex, age, marital status, education, company size, industries, and a history of psychiatric disease). Results Of total 12 249 participants, 72.4% were permanent and 27.6% were temporary employees. The prevalence was 8.5% for persistent suicidal ideation and 3.2% for newly developed suicidal ideation in the COVID‐19 pandemic. Temporary employment was significantly associated with persistent suicidal ideation (adjusted odds ratio [aOR] = 1.36 [95% confidence interval, CI: 1.16–1.59]; P < .001), but not associated with newly developed suicidal ideation (aOR = 1.10 [0.85–1.42]; P = .457) after adjusting the covariates. Sensitivity analysis showed temporary employment was significantly associated with persistent suicidal ideation only in women. Newly developed suicidal ideation was significantly higher among participants of a young age, employees in drinking/eating/hotel business industry, and those having a history of psychiatric disease than among the counterparts. Conclusions Working on a temporary employment contract was associated with persistent suicidal ideation under conditions of COVID‐19 outbreaks in Japan. However, the result showed no significant difference in newly developed suicidal ideation. Further longitudinal study will be needed to examine the risk of being employed on an unstable occupational contract in the prolonged pandemic.

This study examined the associations between childbirth decisions in women with unintended pregnancies and long-term psychological distress. An online survey of women selected from a representative research panel was conducted in July 2021. Among participants who experienced an unintended pregnancy, the childbirth decision was categorized: (i) wanted birth, (ii) abortion, (iii) adoption, and (iv) unwanted birth. Participants who made childbirth decisions more than 1 year ago were included. ANCOVA was conducted with psychological distress (Kessler 6) as the dependent variable and education, marital status, years from the decision, age of the first pregnancy, economic situation at the unintended pregnancy, and the number of persons consulted at the unintended pregnancy as covariates. Logistic regression analysis was conducted for high distress (K6 ≥ 13) by adjusting the same covariates. A total of 47,401 respondents participated in the study. Women with an experience of unintended pregnancy experienced more than 1 year before the study were analyzed (n = 7162). Psychological distress was the lowest for wanted birth and increased for abortion, adoption, and unwanted birth. In the adjusted model, abortion was associated with lower distress scores than both adoption and unwanted birth. Compared to the wanted birth, adoption and unwanted birth showed significantly higher levels of distress (adjusted odds ratio [aOR] = 2.03 [95% CI 1.36–3.04], aOR = 1.64 [95% CI 1.04–2.58], respectively). Long-term effects on psychological distress differed according to the childbirth decisions in unintended pregnancy. Healthcare professionals should be aware of this hidden effect of unintended pregnancy experience on women’s mental health.