早产儿消化道穿孔的病因及影响预后的危险因素分析

目的:探讨早产儿消化道穿孔的病因，分析影响早产儿消化道穿孔短期预后不良的危险因素。方法:回顾性分析山西省 儿童医院新生儿外科2015年1月—2021 年5月诊治的89 例早产儿消化道穿孔的临床资料。根据术后3 个月时结局分为生存 组和预后不良组。比较两组术前、术中及术后与早产儿消化道穿孔预后不良相关的因素，采用Logistic 回归分析筛选早产儿消 化道穿孔预后不良的危险因素。结果:早产儿消化道穿孔的病死率为25.84%，坏死性小肠结肠炎（NEC）和胃壁肌层缺损是早产 儿消化道穿孔常见的病因。单因素分析显示生存组患儿从发现气腹至手术时间在8 h 之内的比例显著高于预后不良组 （χ2=15.22，P＜0.01）。预后不良组合并脓毒性休克的比例显著高于生存组（χ2=33.19，P＜0.01）。预后不良组术后合并需非计划二次 手术的并发症比例显著高于生存组（χ2=7.24，P＜0.01）。Logistic 回归分析显示脓毒性休克（OR=0.06，95%CI:0.02~0.21，P＜0.01）和 气腹至手术时间大于8 h（OR=0.23，95%CI:0.07~0.81，P＜0.05）是早产儿消化道穿孔短期预后不良的危险因素。结论:NEC 和胃 壁肌层缺损是早产儿消化道穿孔的主要病因，脓毒性休克和从气腹发生至手术时间大于8 h 是早产儿消化道穿孔短期预后 不良的危险因素。     

A Priori Subcell Limiting Approach for the FR/CPR Method on Unstructured Meshes

A priori subcell limiting approach is developed for high-order flux reconstruction/correction procedure via reconstruction (FR/CPR) methods on two-dimensional unstructured quadrilateral meshes. Firstly, a modified indicator based on modal energy coefficients is proposed to detect troubled cells, where discontinuities exist. Then, troubled cells are decomposed into nonuniform subcells and each subcell has one solution point. A second-order finite difference shock-capturing scheme based on nonuniform nonlinear weighted (NNW) interpolation is constructed to perform the calculation on troubled cells while smooth cells are calculated by the CPR method. Numerical investigations show that the proposed subcell limiting strategy on unstructured quadrilateral meshes is robust in shock-capturing.     

Modifiable lifestyle factors and cognitive reserve: A systematic review of current evidence

This systematic review aims to summarize cognitive reserve (CR) evaluation approaches and to examine the role of seven selected modifiable lifestyle factors (diet, smoking, alcohol consumption, physical activity, cognitive leisure activity, sleep, and meditation) in mitigating the impacts of age- or disease-related brain changes on cognition. Eighteen population-based English empirical studies were included. We summarize the study designs and identify three CR models that were broadly used in these studies, including a residual model assessing lifestyle factors in relation to unexplained variance in cognition after accounting for brain markers, a moderation model testing whether lifestyle factors moderate the relationship between brain status and cognition, and a controlling model examining the associations between lifestyle factors and cognition when controlling for brain measures. We also present the findings for the impact of each lifestyle factor. No studies examined diet, sleep, or meditation, and only two studies focused on smoking and alcohol consumption each. Overall, the studies suggest lifestyle activity factors (physical and cognitive leisure activities) may contribute to CR and attenuate the damaging impact of brain changes on cognition. Standardized measurements of lifestyle factors and CR are needed, and mechanisms underlying CR need to be further addressed as well.     

药物饲料添加剂吉他霉素耐药性风险评估

目的 为给兽药减量政策的制定、动物源性食品安全的维护提供理论依据。方法 利用每日允许摄入量（ADI）、估算每日摄入量（EDI）及慢性风险熵（CRQ），对中国居民通过摄入肉蛋乳等动物性食品暴露于吉他霉素的耐药性风险进行点评估。结果 随着年龄增长，中国居民的吉他霉素膳食暴露量逐渐降低。2～7岁人群吉他霉素的膳食暴露量最高，男女分别为2.17和2.29 μg/ ( kg·bw·d)；＞65岁人群膳食暴露量最低，男女分别为0.45和0.46 μg/ ( kg·bw·d)。2～7岁人群通过摄入乳制品的吉他霉素的膳食暴露量最大，男女分别为1.15和1.22 μg/ ( kg·bw·d)，8岁以上人群通过摄入肉类食品的吉他霉素的膳食暴露量最大。中国居民通过摄入肉蛋乳等动物性食品暴露于吉他霉素，各年龄段CRQ均小于1。其中2～7岁人群CRQ值最高，风险最大；65岁以上人群CRQ值最低，风险最小。结论 中国居民通过摄入动物性食品的吉他霉素耐药性风险较低，危害程度较小，但儿童通过摄入乳制品的吉他霉素耐药性风险较高，有必要制定乳制品中吉他霉素残留的限量标准。     

芦山地震5年后雅安市高血压患者心理卫生问题检出率及其影响因素

目的 了解芦山地震5年后雅安市高血压患者心理卫生问题检出率及其影响因素，为促进地震灾区高血压患者心理健康提供参考。方法 采用分层整群随机抽样方法，于2018年12月选取雅安市高血压患者800例作为研究对象。采用自编居民基本信息调查表收集患者的基本资料，采用12项一般健康问卷（GHQ-12）评定患者近期是否存在心理卫生问题，采用Logistic回归分析其影响因素。结果 回收有效问卷744份（93.00%），检出存在心理卫生问题者79例（10.62%）。单因素分析结果显示，不同婚姻状况（P?0.01）、家庭人均月收入（P=0.012）、是否接受社会救助（χ²=25.194，P?0.01）的高血压患者心理卫生问题检出率差异均有统计学意义。Logistic回归分析显示，未婚/分居/离异/丧偶（OR=3.879，P=0.015）以及接受社会救助（OR=4.705，P?0.01）是高血压患者存在心理卫生问题的危险因素。结论 雅安市高血压患者心理卫生问题检出率较低，未婚/分居/离异/丧偶者以及接受社会救助的高血压患者心理卫生问题可能更突出。