The Role of Interpersonal Problems and Family Environment in the Association Between Impulsivity and Suicidal Ideation: A Moderate Mediation Model

Suicidal ideation in medical students of Hebei province: prevalence and associated factors

Objectives

This study investigated the prevalence of suicidal ideation (SI) among Chinese medical students and its associated risk factors.

Methods

A total of 6643 medical students (2383 males/4260 females) were recruited from a medical college in Hebei Province, China. Demographic data were collected via a self-administered questionnaire. The Childhood Trauma Questionnaire Short Form (CTQ-SF) was used to evaluate childhood maltreatment (CM), and the Adolescent Self-Rating Life Events Checklist (ASLEC) was used to evaluate the stressful life events. Suicidal ideation was assessed using the Beck Scale for Suicide Ideation (BSSI). Univariate and multivariate logistic regression models were used to analyze the factors affecting SI.

Results

The prevalence of SI in medical students was 11.5% (763/6643). Multivariate logistic regression analysis revealed that SI was significantly associated with younger age, a female sex, being lovelorn, being introverted, experiencing CM during childhood, and experiencing stressful life events within the past 12 months. Of the five subtypes of CM, emotional abuse may have the strongest effect on SI (OR=2.76, 95% CI: 1.72-4.42). The joint effects of CM and stressful life events were significantly associated with an increased risk of SI (OR=5.39, 95% CI: 4.15-6.98).

Conclusion

The prevalence of SI among medical students is high, and medical students who have experienced CM and stressful life events have a higher tendency towards SI. Screening for both CM and stressful life events may be an effective way of identifying individuals at high risk of SI.

Correlations between negative life events and suicidal ideation among Chinese adolescents: a meta-analysis

Background

Suicide ideation (SI) has become a serious social issue worldwide, and research has found a certain correlation between negative life events (NLE) and SI. Nevertheless, this relationship is still not clear among Chinese adolescents, a special population. Hence, this investigation performed a meta-analysis of observational research on the correlation between NLE and SI among adolescents in China, to further clarify the association.

Methods

We performed an extensive search on seven electronic databases starting from their establishment until March 10, 2023. The research mainly focused on cross-sectional studies conducted on samples of Chinese adolescents. To examine the association between NLE and SI, a meta-analysis model using random effects was utilized. To investigate moderating factors such as age, region, assessment tools for SI, and year of publication, subgroup and meta-regression analyses were performed. The AHRQ evaluated the quality of the study. The synthesis of data was conducted utilizing STATA software (version 16).

Results

Ultimately, a total of 30 cross-sectional studies were selected for this analysis, including 39,602 individuals in the participant sample. The results showed that NLE was moderately positively correlated with SI among Chinese adolescents (r = 0.29, 95% CI: 0.26, 0.32). In addition, this relationship was moderated by regional differences and the measurement tool used for SI. Studies conducted in Western China showed a higher correlation coefficient than those conducted in Eastern and Central China. Moreover, research conducted with the SSIOSS demonstrated a stronger correlation coefficient compared to studies utilizing the BSI-CV or other assessment instruments.

Conclusion

This meta-analysis indicates that NLE is linked to SI in Chinese teenagers, especially those residing in Western regions of China. Identifying and intervening in NLE and associated risk factors are crucial to prevent suicide within this demographic.

Joint developmental trajectories and correlates of internalizing and externalizing problems among Chinese adolescents

BACKGROUND

Internalizing and externalizing problems are the most prevalent health problems among adolescents. However, few studies have examined co-occurring internalizing and externalizing problems from a longitudinal perspective.

METHODS

A total of 1051 seventh-grade students from two junior high schools were recruited at baseline. Among them, 932 valid participants were reassessed 1 year and 2 years later. Data were analyzed using parallel-process latent class growth analysis and multinominal logistic regression.

RESULTS

Four joint trajectories of internalizing and externalizing problems were identified. Compared with the low-risk group, adolescents in the moderate and chronic co-occurring group had lower resilience, higher levels of insecure attachment, family conflicts, and academic pressure. Adolescents in the pure internalizing group had higher levels of family conflicts and academic pressure compared with the low-risk group.

CONCLUSIONS

Co-occurrence of symptoms is very high in adolescents. More individualized intervention programs should be provided to these specific groups.

Negative life events increase the risk of suicidal ideation in 6653 Chinese freshmen: From a 1-year longitudinal study

BACKGROUND

Suicide is one of the leading causes of juvenile death. Suicidal ideation (SI) is a strong predictor of suicide, while negative life events are associated with SI in adolescents. The aim of this study was to investigate the effect of negative life events on SI in a sample of Chinese freshmen.

METHODS

The current study employed a cluster sampling method with 7118 freshmen at baseline and 6653 at follow-up. Negative life events were assessed by using the Adolescent Self-Rating Life Events Check List (ASLEC), and SI was assessed by a separate question for self-report. The PHQ-9 was used to measure depression at baseline.

RESULTS

The incidence of suicidal ideation was 1.52% (95% CI: 1.22%-1.81%). Two dimensions of negative life events, interpersonal relationship and others were risk factors for SI, while female students were more susceptible to them. Consistently, interpersonal relationship and others were risk factors for SI in participants without depression and with mild depression. However, health & adaptation was found to be the only dimension of negative life events contributing to the risk of SI in participants with moderate, severe and extremely severe depression.

LIMITATIONS

There may be recall bias in this study.

CONCLUSIONS

Negative life events increase the risk of SI in college students. Female students are more susceptible to negative life events. The effect of different dimensions of negative life events on SI varies in participants with and without depression.

Differences in Behavioral Inhibitory Control in Response to Angry and Happy Emotions Among College Students With and Without Suicidal Ideation: An ERP Study

Suicidal ideation is one of the strongest predictors of suicide. A large number of studies have illustrated the important effect of impulsivity on suicidal ideation, and behavioral inhibitory control (BIC) is a specific manifestation of impulsivity. The goal of the present study is to evaluate the difference in BIC in response to happy and angry emotions between individuals with or without suicidal ideation to reveal the underlying mechanism of the effect of impulsivity on suicidal ideation when accounting for the effect of emotion. Combining the ERP technique and the two-choice oddball paradigm, a total of 70 college students were recruited to participate in this study. The Beck Scale for Suicidal Ideation–Chinese Version was used to identify whether the participants had suicidal ideation. There were 30 participants in the risky-suicidal ideation (SI) group and 19 participants in the non-suicidal ideation (NSI) group. The results showed that the reaction time of the SI group was longer than that of the NSI group for happy emotions. At the electrophysiological level, the P3 amplitude of the NSI group was larger than that of the SI group regardless of the electrode sites and valence, and the P3 component elicited by angry faces was larger than those elicited by happy faces in the SI group. These findings suggest that individuals without suicidal ideation have better BIC, and the SI group has more difficulty controlling their responses to happy emotions than their responses to angry emotions.