Affective temperaments moderate the effect of insomnia on depressive symptoms in adult community volunteers

Moderation by better sleep of the association among childhood maltreatment, neuroticism, and depressive symptoms in the adult volunteers: A moderated mediation model

BACKGROUND

Previously, we demonstrated that childhood maltreatment could worsen depressive symptoms through neuroticism. On the one hand, some studies report that sleep disturbances are related to childhood maltreatment and neuroticism and worsens depressive symptoms. But, to our knowledge, no reports to date have shown the interrelatedness between childhood maltreatment, neuroticism, and depressive symptoms, and sleep disturbance in the one model. We hypothesized that sleep disturbance enhances the influence of maltreatment victimization in childhood or neuroticism on adulthood depressive symptoms and the mediation influence of neuroticism between maltreatment victimization in childhood and adulthood depressive symptoms.

SUBJECTS AND METHODS

Total 584 Japanese volunteer adults recruited through convenience sampling from 4/2017 to 4/2018 were assessed regarding their characteristics of demographics, history of childhood maltreatment, sleep disturbance, neuroticism, and depressive symptoms with questionnaires self-administered. Survey data were analyzed using simple moderation models and a moderating mediation model.

RESULTS

The interaction of sleep disturbance with childhood maltreatment or neuroticism on depressive symptoms was significantly positive. Furthermore, the moderating effect of sleep disturbance on the indirect effect of childhood maltreatment to depressive symptoms through neuroticism was significantly positive.

LIMITATIONS

Because this was a cross-sectional study, a causal relationship could not be confirmed.

CONCLUSIONS

Our findings indicate that individuals with milder sleep disturbance experience fewer depressive symptoms attributable to neuroticism and childhood maltreatment. Additionally, people with less sleep disturbance have fewer depressive symptoms arising from neuroticism owing to childhood maltreatment. Therefore, improvement of sleep disturbance will buffer the aggravating effect of childhood maltreatment, neuroticism caused by various factors, and neuroticism resulting from childhood maltreatment on depressive symptoms.

Symptoms and risk factors of depression and PTSD in the prolonged COVID-19 pandemic: a longitudinal survey conducted from 2020 to 2022 in Japan

BACKGROUND

The present study aimed to explore changes in depression and posttraumatic stress disorder (PTSD) among the general population during the prolonged COVID-19 pandemic and to investigate risk factors and adaptive/nonadaptive strategies.

METHODS

A web-based longitudinal survey was conducted across five timepoints from 2020 to 2022 in Japan. Depressive symptoms were measured using the Patient Health Questionnaire-9 (PHQ-9), PTSD was measured using Impact of Event Scale-Revised (IESR), and coping strategies were measured using Brief Coping Orientation to Problems Experienced (Brief COPE). Higher scores of PHQ-9 and IESR indicate more symptoms and Higher score of Brief COPE indicate that these means of coping are used very frequently.

RESULTS

A total of 1,366 participants (mean age = 52.76, SD = 15.57) were analyzed. Regarding levels of depression, PHQ-9 scores in 2022 were lower than in 2020 and 2021 (all p < 0.01). Regarding levels of PTSD, IESR scores in 2022 were lower than in 2021 among females (p < 0.001). Being younger (β = -0.08 and - 0.13, both p < 0.01) and engaging in self-blame (β = 0.12 and 0.18, both p < 0.01) increased PHQ-9 scores regardless of sex. For males, not working (β = 0.09, p = 0.004) and having suffered an economic impact (β = 0.07, p = 0.003) were risk factors for depressive symptoms, and active coping (β = -0.10, p = 0.005) was associated with decreased depressive symptoms. For females, substance use (β = 0.07, p = 0.032) and behavioral disengagement (β = 0.10, p = 0.006) increased depressive symptoms, and females did not show strategies that decreased the symptoms.

CONCLUSIONS

Levels of depression might have increased in the early stages of the pandemic and decreased in January 2022. Although males need to improve their economic situation to decrease depressive symptoms, adaptive strategies might be difficult to identify due to the prolonged pandemic among both sexes. In addition, the pandemic might be a depressive event but not a traumatic event among the general population, at least in Japan.

The association between affective temperaments and insomnia as mediated by satisfaction with life: a cross-sectional study

BACKGROUND

The primary objectives of this study were to examine whether affective temperaments are associated with satisfaction with life; to determine whether satisfaction with life can mediate the relationship between affective temperaments and insomnia; and to reaffirm the relationship between affective temperaments and insomnia. We hypothesized that affective temperaments were associated directly and indirectly via satisfaction with life with insomnia.

PARTICIPANTS AND PROCEDURE

A total of 497 participants aged 18 to 67 years, including 435 women and 62 men, were recruited from the general population via an online recruitment platform. We used the Temperament Evaluation of the Memphis, Pisa, Paris and San Diego Autoquestionnaire to evaluate affective temperaments and the Satisfaction with Life Scale to assess satisfaction with life. The Athens Insomnia Scale was used to assess participants' level of insomnia symptoms.

RESULTS

Depressive, cyclothymic, irritable and anxious temperaments correlated positively with insomnia symptoms, but hyperthymic temperament correlated negatively with insomnia symptoms. Satisfaction with life correlated negatively with insomnia symptoms. Hyperthymic temperament correlated positively with satisfaction with life, but depressive, cyclothymic, irritable and anxious temperaments correlated negatively with satisfaction with life. Hierarchical regression analysis indicated that 30% of the variance in insomnia symptoms was attributable to satisfaction with life level and the presence of cyclothymic and anxious temperaments. The mediation analysis suggested a significant indirect effect of cyclothymic and anxious temperaments on insomnia through satisfaction with life as a mediator between affective temperaments and insomnia.

CONCLUSIONS

Cyclothymic and anxious temperaments can influence the symptoms of insomnia directly and indirectly as mediated by satisfaction with life.

The association between affective temperaments and depressive symptoms in a population of medical university students, Poland

Background

Compared to their peers, medical students are more exposed to stress, and many present symptoms of depression, making them a group prone to experiencing mental illnesses.

Objective

This study investigates a potential link between the occurrence of symptoms of depression and the dominating type of affective temperament in young people studying at a medical university.

Methods

One hundred thirty-four medical students were surveyed using two validated questionnaires; the Polish versions of Beck's Depression Inventory-II (BDI-II) and the Temperament Evaluation of the Memphis, Pisa, and San Diego Autoquestionnaire (TEMPS-A).

Results

The data analysis revealed a significant link between symptoms of depression and affective temperaments, most significantly in subjects with an anxious temperament.

Conclusion

This study confirms the role of various affective temperaments as a risk factor for mood disorders, specifically depression.

Age-related differences in depressive symptoms and coping strategies during the COVID-19 pandemic in Japan: A longitudinal study

OBJECTIVE

The coronavirus 2019 (COVID-19) pandemic has particularly influenced the mental health of younger adults; accordingly, this study investigated age-related factors related to mental health and provided suggestions related to mental health recovery.

METHODS

A web-based longitudinal survey was conducted from 2020 to 2021 in Japan. The survey consisted of the Patient Health Questionnaire-9 (PHQ-9), used to measure depressive symptoms as a response variable, and an anger questionnaire and coping strategy scale to assess explanatory variables.

RESULTS

A total of 1468 participants were analyzed (valid response rate = 54.2%); 368 were younger adults (age range = 20-39), 667 were middle-aged adults (age range = 40-64), and 433 were aged adults (age range = 65-79). The PHQ-9 scores in the younger adults worsened over the three survey timepoints. State anger was strongly related to PHQ-9 scores in all age groups (standardized beta = 0.39-0.47), and state anger in the younger group was highest at all survey times, In the younger group, only nonadaptive coping strategies were related to PHQ-9 scores. Emotional support, venting, and humor adaptive strategies used by middle-aged and aged adults were most commonly used by younger adults; however, there were no significant relationships of these strategies with PHQ-9 scores in the younger group.

CONCLUSION

The level of depressive symptoms among the younger adults might be considerably worse than the middle-aged and aged adult. The younger adults might not make use of strategies, hence, they might need advice and skill training of strategies.

Resilience Moderates the Association of Sleep Disturbance and Sleep Reactivity with Depressive Symptoms in Adult Volunteers

PURPOSE

Depression poses a substantial burden worldwide. Therefore, elucidating the pathophysiological mechanism of depression is important. Sleep disturbance and sleep reactivity are symptoms of depression and are also known to exacerbate depressive symptoms. On the other hand, it is well known that resilience ameliorates depressive symptoms. To our knowledge, there have been no reports to date regarding the interaction effects among sleep disturbance, sleep reactivity, and resilience on depressive symptoms. We hypothesized that resilience buffers the aggravating effects of sleep disturbance and sleep reactivity on depressive symptoms. To test this hypothesis, we conducted hierarchical multiple regression analyses.

SUBJECTS AND METHODS

A total of 584 Japanese adult volunteers were recruited between April 2017 and April 2018 by convenience sampling. Their demographic characteristics, sleep disturbance, sleep reactivity, resilience, and depressive symptoms were investigated using self-administered questionnaires. The data were analyzed using hierarchical multiple regression analyses.

RESULTS

Sleep disturbance and sleep reactivity were significantly positively associated with depressive symptoms, whereas resilience was significantly negatively associated with depressive symptoms. Moreover, there was a significant interaction between sleep disturbance or sleep reactivity and resilience on depressive symptoms. Resilience significantly alleviated the aggravating effect of sleep disturbance and sleep reactivity on depressive symptoms.

CONCLUSION

Our results indicate that people with lower resilience have more severe depressive symptoms that are associated with sleep disturbance and sleep reactivity. Therefore, there is a possibility that the enhancement of resilience will buffer the aggravating effects of sleep disturbance and sleep reactivity on depressive symptoms, and that improving sleep quality might alleviate the negative effect of low resilience on depressive symptoms.