The effect of income level on all-cause mortality and suicide among patients using antidepressants: A population-based cohort study

The familial transmission of suicide and non-suicidal self-injury in different income levels in town

BACKGROUND

Prior researches have established that suicide and non-suicidal self-injury (NSSI) exhibit familial transmission patterns. However, the extent to which these patterns vary across different income levels remains unclear, as well as the specific factors that influence them. This study aimed to explore these questions.

METHODS

We analyzed data from 13,988 parent-child pairs in Chongqing, China, where the children were aged from 7 to 12 years old. Six income levels were considered, and the children's depression and anxiety symptoms were assessed using standardized scales (the Center for Epidemiological Studies Depression Scale for Children, [CES-DC], and the Screen for Child Anxiety Related Emotional Disorders [SCARED], respectively). Binary logistic regression analysis was employed to examine the transmission of suicide and NSSI across different income levels.

RESULTS

Familial transmission of suicide was significant difference in all income levels except the highest, while familial transmission of NSSI was significant difference in all income levels except the lowest. Notably, in both low- and high-income levels, suicide and NSSI transmissions primarily occurred among male children, mothers with higher education, and children who spent long time with their mothers. Additionally, the transmissions were mediated partially or entirely by children's depression and anxiety symptoms.

LIMITATIONS

Future studies should investigate the separate effects of fathers' and mothers' suicide and NSSI histories on familial transmission patterns.

CONCLUSION

The familial transmissions of suicide and NSSI exhibited distinct patterns across different income levels.

The Role of Socioeconomic Position in the Association Between Mental Disorders and Mortality: A Systematic Review and Meta-Analysis

Importance

Studies are lacking summarizing how the association between mental disorders and mortality varies by socioeconomic position (SEP), particularly considering different aspects of SEP, specific types of mental disorders, and causes of death.

Objective

To investigate the role of SEP in the association between mental disorders and mortality and the association between SEP and mortality among people with mental disorders.

Data Sources

MEDLINE, Embase, PsycINFO, and Web of Science were searched from January 1, 1980, through April 3, 2023, and a snowball search of reference and citation lists was conducted.

Study Selection

Inclusion criteria were observational studies estimating the associations between different types of mental disorders and mortality, stratified by SEP and between SEP and mortality in people with mental disorders.

Data Extraction and Synthesis

Pairs of reviewers independently extracted data using a predefined data extraction form and assessed the risk of bias using the adapted Newcastle-Ottawa scale. Graphical analyses of the dose-response associations and random-effects meta-analyses were performed. Heterogeneity was explored through meta-regressions and sensitivity analyses.

Main Outcomes and Measures

All-cause and cause-specific mortality.

Results

Of 28 274 articles screened, 71 including more than 4 million people with mental disorders met the inclusion criteria (most of which were conducted in high-income countries). The relative associations between mental disorders and mortality were similar across SEP levels. Among people with mental disorders, belonging to the highest rather than the lowest SEP group was associated with lower all-cause mortality (pooled relative risk [RR], 0.79; 95% CI, 0.73-0.86) and mortality from natural causes (RR, 0.73; 95% CI, 0.62-0.85) and higher mortality from external causes (RR, 1.18; 95% CI, 0.99-1.41). Heterogeneity was high (I2 = 83% to 99%). Results from subgroup, sensitivity, and meta-regression analyses were consistent with those from the main analyses. Evidence on absolute scales, specific diagnoses, and specific causes of death was scarce.

Conclusion and Relevance

This study did not find a sufficient body of evidence that SEP moderated the relative association between mental disorders and mortality, but the underlying mortality rates may differ by SEP group, despite having scarcely been reported. This information gap, together with our findings related to SEP and a possible differential risk between natural and external causes of death in individuals with specific types of mental disorders, warrants further research.

Suicide after cancer diagnosis in South Korea: a population-based cohort study

OBJECTIVE

The present study aimed to determine whether the suicide risk increased after a cancer diagnosis.

DESIGN

Population-based cohort study.

SETTING AND PARTICIPANTS

This study incorporated the National Health Insurance Service-National Sample Cohort in South Korea. Of the 975 348 subjects, 39 027 with cancer and 936 321 who were cancer free participated between 2005 and 2013.

PRIMARY OUTCOME MEASURE

Suicide.

RESULTS

A total of 110 suicides (82 men, 28 women) were identified among these 39 027 subjects with cancer during a total of 127 184 person-years; among the 936 321 cancer-free subjects, 2163 suicides were reported during a total of 8 222 479 person-years. Cox proportional hazards models were used to compare all-cause and suicide mortalities after cancer diagnosis following adjustment for possible confounding covariates. After adjusting for factors related to suicide, we identified an elevated relative risk of suicide among patients with cancer (HR: 1.480, 95% CI: 1.209 to 1.812). Among men, the relative risk was substantially increased among patients with lip, oral cavity/pharyngeal, colon and rectal, pancreatic and lung cancers when compared with cancer-free subjects; whereas among women, the relative risk was substantially increased among patients with colon and rectal cancers.

CONCLUSION

Our study observed an increased risk of suicide among patients with cancer that varied according to the anatomical cancer site, even after accounting for clinical comorbidities and psychiatric illness. Our findings indicate a need for social support and suicide prevention strategies for patients with cancer.