Adolescent Loneliness and the Interaction between the Serotonin Transporter Gene (5-HTTLPR) and Parental Support: A Replication Study

Loneliness in Kenyan adolescents: Socio-cultural factors and network association with depression and anxiety symptoms

Loneliness is associated with negative mental health outcomes and is particularly common among adolescents. Yet, little is known about the dynamics of adolescent loneliness in non-Western, low-income nations. Accordingly, we estimated the severity of loneliness in a sample of Kenyan adolescents and used mixed-effects regression modelling to determine the socio-cultural factors associated with loneliness. We also used network analysis to examine the associations between loneliness, depression, and anxiety at the symptom level. We analyzed data from a large sample (N = 2,192) of school-attending Kenyan adolescents aged 12-19 (58.3% female, 41.7% male). Standardized measures of loneliness (ULS-8), depression (PHQ-8), and anxiety (GAD-7) were used. Our mixed-effects model revealed that female and lower-income adolescents felt lonelier. The perception of feeling alone emerged as the aspect of loneliness most strongly linked to depression and anxiety symptoms. Our findings establish an estimate of loneliness levels in Kenyan adolescents, and identify possible socio-cultural factors associated with loneliness. We found that perceptions of isolation more strongly linked loneliness to psychopathology than did objective measures of isolation or preferences for social contact. Finally, we identify specific aspects of loneliness that could prove to be treatment targets for youth psychopathology; however, further research is needed. Limitations, future directions, and clinical implications are discussed.

Social Anxiety Status of Left-Behind Children in Rural Areas of Hunan Province and its Relationship with Loneliness

OBJECTIVE

This study was designed to investigate the situation of social anxiety among left-behind children in rural areas of Hunan Province, China, and to study the effect of social anxiety on loneliness.

METHODOLOGY

A total of 797 left-behind children were selected from rural areas in Hunan Province, China. The basic information questionnaire for left-behind children, Social Anxiety Scale for Children, Perceived Social Support Scale and UCLA Loneliness Scale were used for investigation.

RESULTS

(1) The social anxiety score of left-behind children in China is 6.84 ± 4.28, higher than non-left-behind children, and the score of boys is lower than that of girls, with no significant difference. The score of left-behind children in grade 5 is significantly lower than that of left-behind children in other grades. (2) The overall loneliness score is 16.30 ± 5.10, higher than non-left-behind children, and the score of boys is significantly higher than that of girls. (3) Social anxiety has a significant positive predictive effect on loneliness (P < 0.01). Regression analysis shows that social anxiety not only affects loneliness directly, but also affects loneliness indirectly through the mediating role of perceived social support.

CONCLUSIONS

Social anxiety is a risk factor for loneliness of left-behind children in rural areas. In the influence of social anxiety on loneliness, social support plays a partial mediating role.

Genetic Contributions to Loneliness and Their Relevance to the Evolutionary Theory of Loneliness

Loneliness is a negative and distressing emotional state that arises from a discrepancy between one's desired and achieved levels of social connectedness. The evolutionary theory of loneliness (ETL) posits that experiencing loneliness is an inherited adaptation that signals that salutary social relations are endangered or damaged and prompts people to reconnect to significant others. The basic tenets of the ETL has led researchers to examine the genetic underpinnings of loneliness. The current review provides an updated overview of genetic studies on loneliness and discusses the importance of genetic research for the ETL. The most recent studies suggest that the many genes that contribute to a small degree to differences in loneliness partially overlap with genes that contribute to neuroticism, but not with depression. In addition, the genetic studies discussed in this review show that genes are unlikely to have a direct effect on loneliness. Instead, environmental factors determine in a dynamic fashion how genes that contribute to loneliness are expressed. Future research on epigenetic processes, such as DNA methylation, can further elucidate the dynamic interplay between genes and the environment and how this interplay contributes to loneliness.