Objectives:To explore the relationship between insomnia symptoms and neuroticism in patients with COVID-19,and to explore the role of anxiety and psychological capital in the relationship.Methods:Totally 687 patients with COVID-19 were recruited from Shanghai Fangcang Hospital.The Athens Insomnia Scale(AIS),Eysenck Personality Questionnaire-Revised Short Scale for Chinese Neuroticism Subscale(EPQ-RSC-N),Self-Rat-ing Anxiety Scale(SAS)and Psychological Capital Questionnaire(PCQ)were used to measure insomnia symp-toms,neuroticism personality trait,anxiety symptoms and psychological capital levels.The deviation-corrected per-centile Bootstrap method was used to test the mediating effect,and the PROCESS program was used to test the moderated effect.Results:The detection rate of insomnia symptoms was 49.93％.The AIS scores were lower in male patients than in female patients(P＜0.01).The SAS scores partly mediated the relationship between neuroti-cism scores and AIS scores,with an effect size of 0.03,accounting for 18.29％of the total effect.With the im-provement of PCQ scores,the predictive effect of SAS scores on AIS scores gradually decreased(β=-0.01,t=-4.41,P＜0.001).Conclusions:Anxiety symptoms in patients with COVID-19 play a partial mediating role in the positive relationship between insomnia symptoms and neuroticism.The psychological capital moderates the relation-ship between insomnia and anxiety symptoms.

BackgroundType 2 diabetes mellitus is one of the most prevalent diseases， which imposes a heavy burden on patients' families and the society. Sleep disorders are recognized as risk factors for the development of diabetes， which may affect the onset and development of diabetes through neuro-endocrino-metabolic pathways， so identifying the factors responsible for the sleep quality of diabetic patients is of great importance in improving their sleep quality. ObjectiveTo investigate the relationship among fear of disease progression， executive function and sleep quality in patients with type 2 diabetes mellitus， so as to provide references for improvement of sleep quality in patients with type 2 diabetes mellitus. MethodsA sample of 197 patients with type 2 diabetes mellitus who were admitted to the Endocrinology Department of the Second Affiliated Hospital of the Air Force Military Medical University from January to May 2023 and met the criteria defined in the Guideline for the Prevention and Treatment of Type 2 Diabetes Mellitus in China （2020 edition） were consecutively selected. All subjects were assessed using Fear of Progression Questionnaire-Short Form （FoP-Q-SF）， Behavior Rating Inventory of Executive Function-Adult version （BRIEF-A） and Pittsburgh Sleep Quality Index （PSQI）. Then the Process macro for SPSS （Model 4） and Bootstrap technique were applied to examine the mediating effect of executive function on the relationship between fear of disease progression and sleep quality in patients with type 2 diabetes mellitus. Results①75 patients （38.07%） with type 2 diabetes mellitus were found to have sleep problems. ②PSQI score in patients with type 2 diabetes mellitus was positively correlated with FoP-Q-SF score and BRIEF-A score （r=0.159， 0.287， P<0.01）. ③Executive function mediated the relationship between fear of disease progression and sleep quality， the indirect value was 0.076 （95% CI： 0.022~0.146）， accounting for 39.58% of the total effect. ConclusionSleep disorders are common in patients with type 2 diabetes mellitus， and executive function may play a medicating role in the relationship between fear of disease progression and sleep quality.

【Objective:】 To explore the effect of metacognition on self-directed learning ability of undergraduate nursing students, and the role of interpersonal communication ability and sense of self-worth between them. 【Methods:】 A total of 905 undergraduate nursing students from six colleges and universities in Shaanxi were selected as the survey subjects by convenient sampling method during August to November 2022. Metacognitive Assessment Inventory, Self-Directed Learning Ability Measurement Scale for Nursing Students, Adolescent Sense of Total Self-Worth Scale, and Supportive Communication Scale were used to conduct a questionnaire survey on undergraduate nursing students. SPSS 25.0 software was used for statistical analysis of the data. 【Results:】 Finally, 854 valid questionnaires (94.36%) were collected, and the results showed that: a) Metacognition of undergraduate nursing students significantly positively predicted self-directed learning ability (β=0.172, P<0.001). b) Interpersonal communication ability played a partial mediating role between metacognition and self-directed learning ability [β=0.019, 95%CI: 0.004~0.034)] . c) The predictive effect of metacognition on self-directed learning ability was regulated by the level of self-worth (R²=0.314, P<0.001). 【Conclusion:】 This paper indicated that the metacognition of undergraduate nursing students indirectly affects their self-learning ability through interpersonal communication ability, and their sense of self-worth plays a moderating role. It is recommended to improve the metacognitive level of undergraduate nursing students, strengthen their interpersonal communication skills, and focus on the cultivation of self-worth, so as to improve their self-directed learning ability.