Coparenting Experiences in African American Families: An Examination of Single Mothers and their Nonmarital Coparents

African American youth from single‐mother homes continue to be overrepresented in statistics on risk behavior and delinquency, a trend that many be attributed to father‐absence, socioeconomic disadvantage, and compromises in parenting more typical of single than two‐parent families. Yet, this risk‐focused perspective ignores a long‐standing strength of the African American community, the involvement and potential protective impact of extended family members in childrearing. This study describes the experiences of 95 African American single mothers and their nonmarital coparents who participated in a study of African American single‐mother families with an 11–16‐year‐old child. Specifically, the study examines: (a) the extent to which nonmarital coparents are involved in childrearing; (b) the relative levels of risk (i.e., depression, mother–coparent conflict) and protective (i.e., parenting) associated with maternal and coparent involvement; and (c) how similarly and/or differently coparent and mother variables operate with regard to youth externalizing problems. Findings reveal that a range of family members and other adults actively participate in childrearing in African American single‐mother families, coparents do not differ from mothers on certain study variables (i.e., depression and mother–coparent conflict) but do for others (parenting), and coparent involvement is associated with youth adjustment in ways that are similar to our more established understanding of maternal involvement. The potential clinical implications of the findings are discussed and future research directions are highlighted.     

Postural control in children with and without neurofibromatosis type 1

Previous research has evaluated the motor proficiency of children with neurofibromatosis type 1 (NF1) and found delays on the balance subtest. However the balance subtest was found to have low sensitivity for identifying balance impairments. This study examines the differences in postural control between children with NF1 and peers with typical development using a force plate. A single limb stance test on a force plate was completed for all participants. The force plate variables, center of pressure maximum distance in the anterior/posterior direction (COPmax A/P) and center of pressure velocity (COPvel A/P) were compared between groups. The NF1 group’s performance was significantly poorer than the control group in both COPmax A/P (p = .01) and COPvel A/P (p = .01). When separated into specific age ranges, only the children in the NF1 group between 5 and 12 years of age demonstrated statistically significant differences in the COP variables. The COP variables for the 13- to 18-year-old group were not significantly different. These results indicate that young children with NF1 have poor postural control. However, postural control appears to improve with maturation.     

肺微小浸润腺癌及浸润前病变HRCT影像特征

为总结肺微小浸润腺癌(MIA)、原位腺癌(AIS)及不典型腺瘤样增生(AAH)结节的HRCT影像特征,回顾性收集43例术前2周内行HRCT检查、经胸腔镜切除、组织病理学证实的50个肺结节,分析结节大小、成分及内部特征.结果显示所有AAH表现为纯磨玻璃结节(pGGN),且≤1.0cm,空气支气管征未见,空泡征少见;86％AIS表现为pGGN,71％的AIS≤1.0cm,且空泡征常见(相对于AAH);95％的MIA表现为混合磨玻璃结节(mGGN),其余为实性结节,90％的MIA＞1.0cm,空气支气管征常见(相对于AIS).因此结节的大小、成分、空泡征及空气支气管征在一定程度上有助于MIA、AIS及AAH的鉴别.     

ERCP在十二指肠乳头旁憩室并胆总管结石诊治中的应用

通过回顾性分析237例十二指肠乳头旁憩室并胆总管结石患者行经内镜逆行胰胆管造影术（ERCP）治疗的资料,探讨ERCP治疗的临床疗效及安全性。结果显示十二指肠乳头位于憩室内41例,十二指肠乳头位于憩室旁196例;胆总管结石位于上段25例,中段131例,下段81例;胆总管直径小于1．0cm23例,1．Ocm～1．5cm89例,1．6cm～2．0cm106例,大于2．0cm19例。均经ERCP治疗成功,因此ERCP治疗十二指肠乳头旁憩室并胆总管结石,可操作性强、创伤小、并发症少,疗效确切,是安全、有效的治疗措施。     

桡骨小头粉碎性骨折的两种治疗方法比较分析

分析比较切开复位内固定和人工桡骨小头置换方法治疗桡骨小头粉碎性骨折（MasonⅢ型）的临床疗效。回顾分析2012年10月～2014年3月收治的24例桡骨小头粉碎性骨折（MasonⅢ型）的临床资料,其中切开复位内固定治疗17例;桡骨小头置换7例,平均随访12个月（6个月～18个月）。根据Broberg Morrey评分系统以及术后影像进行评价比较,同时比较两组住院天数以及费用。结果评价比较显示两者疗效均佳,术后两者活动度和功能评分相近,两组住院天数相近,内固定组费用更低。桡骨小头粉碎性骨折须尽早进行解剖复住功能重建,切开复位内固定和桡骨小头置换疗效相当。     

临床整合医学的必要性及实施中存在的问题——以慢性阻塞性肺疾病及其合并症的诊治为例

近年来人们逐渐认识到慢性阻塞性肺疾病(COPD)是一种全身性疾病,即COPD不仅会影响到气道和肺,还会引起一系列合并症,包括心血管疾病、骨质疏松、焦虑和抑郁、癌症、感染、代谢综合征和糖尿病等。这些合并症会显著地影响COPD疾病严重程度和预后,因而必须对COPD进行整体防控,然而COPD的上述合并症的诊治分属不同学科,所以要做好COPD的整体防控就需要相关学科进行医学整合。     

P16、CyclinDl和CDK4在结直肠癌组织中表达及意义

细胞周期过程中癌基因的激活与抑癌基因的失活等是造成细胞恶性增殖、转化的重要因素。细胞周期G1／S期各调节因子的异常改变与细胞癌变关系尤为密切。P16、CyclinDl和CDK4均为重要的细胞周期调控蛋白,任何原因导致这些蛋白异常表达时,将引起细胞周期调节失控,导致肿瘤的发生和恶性演进。结直肠癌的发生发展同上述三者关系密切。本实验通过免疫组化方法进行检测结直肠癌组织中P16、CyclinDl和CDK4三者的表达及其与结直肠癌临床指标的关系,为揭示三者在结直肠癌发生发展中的作用提供一定的实验依据。     

Kinematic and ground reaction force accommodation during weighted walking

Weighted walking is a functional activity common in daily life and can influence risks for musculoskeletal loading, injury and falling. Much information exists about weighted walking during military, occupational and recreational tasks, but less is known about strategies used to accommodate to weight carriage typical in daily life. The purposes of the study were to examine the effects of weight carriage on kinematics and peak ground reaction force (GRF) during walking, and explore relationships between these variables. Twenty subjects walked on a treadmill while carrying 0, 44.5 and 89 N weights in front of the body. Peak GRF, sagittal plane joint/segment angular kinematics, stride length and center of mass (COM) vertical displacement were measured. Changes in peak GRF and displacement variables between weight conditions represented accommodation. Effects of weight carriage were tested using analysis of variance. Relationships between peak GRF and kinematic accommodation variables were examined using correlation and regression. Subjects were classified into sub-groups based on peak GRF responses and the correlation analysis was repeated. Weight carriage increased peak GRF by an amount greater than the weight carried, decreased stride length, increased vertical COM displacement, and resulted in a more extended and upright posture, with less hip and trunk displacement during weight acceptance. A GRF increase was associated with decreases in hip extension (|r| = .53, p = .020) and thigh anterior rotation (|r| = .57, p = .009) displacements, and an increase in foot anterior rotation displacement (|r| = .58, p = .008). Sub-group analysis revealed that greater GRF increases were associated with changes at multiple sites, while lesser GRF increases were associated with changes in foot and trunk displacement. Weight carriage affected walking kinematics and revealed different accommodation strategies that could have implications for loading and stability.     

Situations de vulnérabilités familiales et pandémie COVID-19

ContextAware of the difficulties caused by the COVID-19 pandemic for many families with children aged 6 or under, this study focuses on three contexts of potential vulnerability: single parenthood, children with developmental disorders, poverty.MethodA questionnaire, consisting of 69 questions, was transmitted nationally during the first lockdown (from 17 March to 10 May 2020). Among the study sample (n = 490), 36 households were single-parent, and 93 families had a child with developmental impairments. From November 2020 to June 2021, a additional qualitative approach was used to reach the most vulnerable groups (n = 23).ResultsThe methodology adopted made it possible to identify modes of experience that converge across families in the three contexts (more strengthened intrafamily relationships and investment in protection measures, for example), and others that appear more specific: pressure felt and need for information for single-parent households and those with children with developmental disorders, the burden of home schooling for single-parent households and the poorest, social isolation for single-parent households and difficulties in maintaining the previous food budget for the most precarious.ConclusionThe various pressures felt, the housing (with or without outdoor spaces) and working conditions, the fear of being sick, the negative feelings, etc. must encourage public authorities to implement psychological support mechanisms, particularly for the most vulnerable parents, in order to avoid subsequent physical and/or psychological health problems or even post-traumatic symptoms for parents and their children.     

Unusual stress behaviour of CeO2-doped diamond-like carbon nanofilms

CeO₂-doped diamond-like carbon (DLC) films with thicknesses of 180–200 nm were deposited by unbalanced magnetron sputtering. When the CeO₂ concentration is in the range 5–8%, the residual compressive stress of the deposited films is reduced by 90%, e.g. from about 4.1 GPa to 0.5 GPa, whereas their adhesion strength increases. These effects are attributed to the dissolution of CeO₂ within the DLC amorphous matrix and a widening interface between the DLC film and the Si substrate, respectively.