Research On The Relationship Between Sedentary Behavior And Non-suicidal Self-injury Behavior In Adolescents

Objective:To understand the current level of adolescent sedentary behavior and the prevalence of non-suicidal self-injury（NSSI）behavior,analyze the impact of sedentary behavior on the risk of non-suicidal self-injury behavior in adolescents,and explore the relationship between sedentary behavior and adolescent non-suicidal self-injury（NSSI）.The relationship between sexual self-injury behaviors provides relevant theoretical basis for reducing the occurrence of non-suicidal self-injury behaviors in adolescents and its prevention and intervention measures.Research objects and methodsIn this study,from September to December 2021,in four cities,Shanghai,Changsha,Kunming,and Urumqi,the"stratified cluster random sampling"method was used to randomly select adolescents aged 12-17 from four cities,with a total of8017 students as the primary The research object of the study.The study used the"Adolescent Physical and Mental Health Questionnaire"to investigate and measure the basic demographic information,sedentary behavior status and non-suicidal self-injury behavior status of adolescents.First,the non-parametric test was used to present the distribution characteristics of adolescents with different durations of sedentary behavior,and the values were presented in the form of P₅₀(P₂₅-P₇₅);secondly,thex~2test was used to analyze the detection status of adolescent non-suicidal self-injury behaviors under different influencing factors;Finally,the effect of different levels of static behavior on the risk of adolescent non-suicidal self-injury behavior was investigated by Logistic regression analysis.Research result1.Basic characteristics of adolescent sedentary behaviorThe median duration of sedentary behavior among adolescents aged 12-17 was522.86 minutes/day,including 527.14 minutes/day for boys and 517.14 minutes/day for girls;the median value of screen time in sedentary behaviors was 42.86minutes/day for both boys and girls;There were significant age differences in the duration of sedentary behavior and screen time（P<0.05）,which increased with age;the detection rates of sedentary behavior duration≥8h/d were 58.8 for boys and girls,respectively.%,56.7%,and the detection rates of screen time≥2h/d were 17.2%and15.2%,respectively.2.Basic situation of adolescent non-suicidal self-injury behaviorThe overall detection rate of non-suicidal self-injury behaviors among adolescents in the past year was 23.7%,of which the detection rate of incidental NSSI behaviors was 10.7%,and the detection rate of repeated NSSI behaviors was 13.0%.In terms of gender,the overall detection rate of NSSI behavior in girls（25.3%）was significantly higher than that in boys（22.0%）,and there were also significant differences in the degree and kind of self-injury between genders（P<0.001）.In terms of age,NSSI behavior increased with age.Inverted"V"-shaped distribution,that is,it first increases with age,and the detection rate of NSSI behavior peaks at 14 years old,at 25.7%,and then begins to decline gradually;There were significant differences among,nutritional status and sleep status（P<0.05）.Among them,the overall detection rate of NSSI behavior among adolescents in Changsha City,restructured families,obesity and lack of sleep was the highest,which were 27.7%,38.2%,24.2%,25.7%.3.The relationship between adolescent sedentary behavior and non-suicidal self-injury behavior1)The overall NSSI,incidental NSSI and repeated NSSI behavior detection rates（26.2%,11.2%,15.0%）of adolescents with sedentary behavior duration≥8h/d were significantly higher than those of adolescents with sedentary behavior duration<8h/d（20.1%,9.9%,10.2%）,the duration of sedentary behavior of adolescents without NSSI behavior was significantly lower than that of adolescents with occasional NSSI behavior and repeated NSSI behavior.Sedentary behavior duration≥8h/d significantly increased the risk of NSSI behavior and recurrence in adolescents,which were 1.23times and 1.37 times higher than those of adolescents with sedentary behavior duration<8h/d（P<0.001）.2)The overall NSSI,incidental NSSI and repeated NSSI behavior detection rates（31.2%,12.9%,18.3%）of adolescents with screen time≥2h/d were significantly higher than those with screen time<2h/d（22.2%,10.2%,11.9%）,the screen time of adolescents without NSSI behavior was significantly lower than those with occasional NSSI behavior and repeative NSSI behavior.Screen time≥2h/d significantly increased the risk of NSSI behavior and recurrence in adolescents,which were 1.47 times and1.50 times higher than those in adolescents with video screen time<2h/d（P<0.001）.Conclusion1.At present,the duration of sedentary behavior of adolescents in some cities in China is longer,and the duration of sedentary behavior tends to increase with age;the overall incidence of non-suicidal self-injury behaviors among adolescents aged 12-17is relatively high,and the overall appearance of an inverted"V"shape with age distribution,among which girls are at higher risk than boys,but boys have a higher incidence in later adolescence;adolescents with insufficient sleep,single parents and restructured families,and obese adolescents have higher risks of NSSI behavior.2.Sedentary behavior is an important factor affecting the occurrence and recurrence of non-suicidal self-injury behaviors in adolescents.Excessive sedentary behaviors,especially screen time,will significantly increase the risk of occurrence and recurrence of non-suicidal self-injury behaviors in adolescents.Girls are more at increased risk of self-harm than boys.