ObjectiveTo compare the effectiveness of posterior malleolus fractures treated by plate and screw internal fixation through posterolateral approach.MethodsThe clinical data of 95 patients with posterior malleolus fractures who were admitted between January 2016 and December 2019 and met the selection criteria were retrospectively analysed. They were divided into plate group (44 cases, treated with posterolateral plate internal fixation) and screw group (51 cases, treated with posterolateral screw internal fixation) according to different treatment methods. There was no significant difference in general data between the two groups of patients such as age, gender, cause of injury, side of injury, ankle fracture or injury classification, time from injury to operation, and percentage of posterior ankle fracture area to the distal tibia articular surface (P>0.05). The operation time, hospital stay, fracture healing time, and surgical complications were compared between the two groups. Imaging examinations (X-ray film, CT scan and reconstruction) were used to assess the reduction quality of ankle fracture, articular congruity, and re-displacement in ankle fracture. At last follow-up, the pain visual analogue scale (VAS) score was used to evaluate the patients’ pain, and the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score was used to evaluate ankle joint function.ResultsPatients in both groups were followed up 6-30 months, with an average of 18.2 months. The operation time of the plate group was significantly longer than that of the screw group (U=−2.040, P=0.041); there was no significant difference in hospital stay between the two groups (U=−1.068, P=0.285). Incision swelling occurred in 2 cases in the plate group, sural nerve injury in 3 cases, and traumatic arthritis in 2 cases during follow-up. In the screw group, there were 1, 2, and 2 cases, respectively. The incidence of complications in the two groups (15.9% vs. 9.8%) was not significantly different (P=0.372). All patients who underwent tibiofibular screw fixation underwent the removal of the tibiofibular screw before taking full weight bearing at 12 weeks after operation, and there was no screw fracture and retention. During the follow-up, there was no infection, re-displacement of fracture, delayed bone union or nonunion, and there was no significant difference in fracture healing time between the two groups (t=0.345, P=0.731). There was no significant difference between the two groups of reduction quality of ankle fracture and articular congruity evaluation results (P>0.05). At last follow-up, there was no significant difference in VAS score, AOFAS ankle-hindfoot score and evaluation grade between the two groups (P>0.05).ConclusionBoth the plate and screw internal fixation through posterolateral approach can achieve satisfied effectiveness in the treatment of posterior ankle fractures with maintenance of fracture reduction, and recovery of ankle joint function. The screw internal fixation has the advantages of minimal invasion and shorter operation time.
ObjectiveTo investigate the factors that influence Chinese residents, self-rated health and the effects of the multilevel health insurance system and neighborhood social capital on self-rated health. MethodsBased on the 2018 China labor-force dynamics survey data, and Stata 15.0 software was used to conduct χ2 test, univariate analysis and multiple logistic regression model were used to analyze the influencing factors of self-rated health of Chinese residents. An interaction model was used to analyze the interactive effects of the multilevel health insurance system and the social capital of the neighborhood on self-rated health. ResultsA total of 10 201 people were investigated in this study, and 39.20% of them were self-rated unhealthy. After adjusting for confounders, the results of the multivariate logistic regression model showed that having social health insurance (OR=0.8, 95%CI 0.7 to 1.0) and having neighborhood social capital (OR=0.7, 95%CI 0.6 to 0.8) were more inclined to self-rated health. In addition, the results showed that being male, having a college degree or higher, having a job, and drinking alcohol increased the risk of self-rated unhealthy (P<0.05); whereas being 45-59 years of age, 60 years of age or older, in the central and western regions, exercising regularly, and having a disease or injury within two weeks decreased the risk of self-rated unhealthy (P<0.05). There was a positive multiplicative interaction effect between health insurance and neighborhood social capital on residents’ self-rated health (univariate: OR=1.5, 95%CI 1.1 to 3.7, P<0.05; multivariate: OR=1.7, 95%CI 1.2 to 2.4, P<0.05), and negative additive interactions (RERI=−0.8, 95%CI −1.4 to −0.1; AP=−0.3, 95%CI −0.6 to −0.1; SI=0.6, 95%CI 0.5 to 0.8). ConclusionAttention should be paid to the self-rated health status of key populations through means such as health promotion and education, and healthy behavior lifestyles should be promoted. The health insurance system should be further improved, and attention should be paid to the role of social capital in the neighborhood, encouraging residents to actively build a good social neighborhood, and realizing the coordinated development of the multilevel health insurance system and the social capital in the neighborhood.