Objective:To analyse the correlation between depression and hip fracture in the middle-aged and elderly population in the Chinese community.Methods:The study data were obtained from the China Health and Retirement Longitudinal Study (CHARLS) database. A total of 16,831 respondents from 12,400 households in the fourth national follow-up data in 2018 were selected as the research sample. The samples were divided into a training set and a test set at a ratio of 7∶3, and the test set data were used for internal validation. For external validation, 2,337 subjects recruited from the Institute of Orthopaedics, the First Affiliated Hospital of Zhejiang Chinese Medical University from 2018 to 2023 were selected as the survey subjects. The Center for Epidemiological Studies Depression Scale (CESD) was used to assess depression. CESD≥16 points were defined as depression, and CESD<16 points were defined as no depression. Binary logistic regression was used to gradually analyze the correlation between depression and hip fracture after adjusting for different covariates.Results:In the training set, statistically significant differences were observed between patients with and without hip fractures in terms of depression prevalence (χ 2=16.310, P<0.001), age (χ 2=9.417, P=0.009), education level ( P<0.001), marital status ( P=0.019), and place of residence ( P=0.035). In the testing set, statistically significant differences were found in depression prevalence (χ 2=10.130, P=0.001), gender (χ 2=4.368, P=0.037), education level ( P=0.013), and smoking history (χ 2=8.804, P=0.012). In the external validation set, significant differences were noted in depression prevalence (χ 2=337.885, P<0.001), age (χ 2=29.475, P<0.001), and smoking history ( P=0.020). After controlling for demographic characteristics, exercise, smoking and drinking history, binary logistic regression showed that the risk of hip fracture in depressed patients was 1.78 times higher in the training set ( OR=1.78, P<0.001), 2.73 times higher in the testing set ( OR=2.73, P=0.002), and 15.21 times higher in the external validation set ( OR=15.21, P<0.001) than that of non-depressed patients, indicating good internal and external validation results. Conclusion:Depression is an independent risk factor for hip fractures among middle-aged and elderly populations in Chinese communities. Early identification and active intervention for depression in this population can help reduce the risk of hip fractures.

Objective:To establish a rapid method for the detection of varicella-zoster virus (VZV) by recombinase-aid amplification (RAA).Methods:The whole genome sequences of VZV were downloaded from the global shared database for comparison and analysis. Specific primers and probe were designed for the four conserved genes respectively and the optimal combination was selected. The optimal reaction system was selected through the concentration gradient of primers and probes, and a fluorescence RAA detection method was established. The sensitivity of the method was evaluated with VZV positive plasmid standard and clinical samples with gradient dilution, the repeatability of the method was evaluated with the lowest detectable limit concentration of positive plasmid standard, and the specificity of other viral nucleic acid method was evaluated. At the same time, this method and quantitative real-time PCR (qPCR) were used to detect clinical samples and the result were compared.Results:The optimal combination of primer pair F2/R2 and probe P2 targeting open reading frame (ORF) 28 gene was selected. Considering the cost factor, the optimal primer concentration was set at 500 nmol/L and the optimal probe concentration was 280 nmol/L. The minimum detection limit was 10 1 copies/μL, and the minimum clinical positive samples with a Ct value of 36.027 could be detected, and the result of repeated experiments were consistent. The method has no cross-reaction with other viral nucleic acids. The detection rate of clinical positive samples was 93.33%, which was almost identical to that of qPCR. Conclusions:This method is simple to operate with high sensitivity, strong specificity, low requirements for experimental conditions, visual detection result, and can detect VZV nucleic acid in samples within 20 minutes, which is a rapid VZV detection method that can be considered for clinical use for detection.