The aim of this study was to explore the relationship between social support, self-efficacy, coping style, and psychological stress in children with malignant tumors during the treatment, and to clarify the mediating effects. From May 2019 to August 2019, selected by convenience sampling method, 141 children with malignant tumors in the treatment period were evaluated using the Social Support Questionnaire, General Self-efficacy Scale, Simplified Coping Style Questionnaire, and Depression-Anxiety-Stress Scale. The results of correlation analysis showed that depression was negatively correlated with coping style, self-efficacy, affirmation and support, satisfaction, company, and intimacy, but positively correlated with conflict and punishment; both anxiety and stress were significantly negatively correlated with coping style, self-efficacy, affirmation and support, company, and intimacy. The results of the model indicated that gender, social support, self-efficacy, and coping style could directly predict the psychological stress of children with malignant tumors in the treatment period, social support and self-efficacy could indirectly predict the psychological stress of children with malignant tumors, and the total effect of self-efficacy on the psychological stress of children was the largest. Through 2000 bootstrap tests of mediating effect, it not only confirmed the mediating effect of self-efficacy and coping style but also had a chain-mediating effect. Appropriate social support can improve the self-efficacy of children with malignant tumors in the treatment period and encourage them to take a positive response to the disease, thereby effectively preventing or reducing the occurrence of psychological stress.

Objective To explore the influence factors of behavior problems of 8~18 years old children with malignant tumors in the treatment period, as well as the mediating effects of social support self-efficacy and post-traumatic growth. Methods From May 2019 to October 2019, 160 children with malignant tumors during the treatment were selected through convenience sampling method, and were investigated via the General Self-Efficacy Scale, Social Support Questionnaire, Post-Traumatic Growth Scale and Conners’ Parent Symptom Questionnaire. Structural equation model was established on the basis of survey results. Results The total detection rate of behavior problems in 8~18 years old children with malignant tumors was 10.6%. The structural equation models indicated that boys had more behavior problems than girls, self-efficacy, social support and post-traumatic growth can directly affect the behavior problems of 8~18 years old children with malignant tumors in the treatment period, and the standardized total effect of self-efficacy in both of the first model and the second model was the largest. Self-efficacy is also able to indirectly and negatively predict the behavior problems based on social support or post-traumatic growth. Social support can directly affect behavior problems or indirectly predict behavior problems through self-efficacy and post-traumatic growth. After 2000 bootstrap tests, the mediating effects of social support self-efficacy and post-traumatic growth were confirmed. Conclusion Reduced total detection rate of behavior problems suggests that targeted interventions in recent years may be effective. Interventions focused on improving self-efficacy, social support and post-traumatic growth may lessen behavior problems of children with malignant tumors in the treatment period.