Anthropometric Characteristics of Mohawk Children Aged 6 to 11 Years: A Population Perspective

OBJECTIVE: Recent studies have concluded that Native North American children have higher proportions of overweight and obesity than children from the general North American population. This study presents anthropometric data on a representative sample of children from the Mohawk Nation that can be used for comparison with other Native American populations. DESIGN: This is a cross-sectional study comparing distributions of anthropometric characteristics of Mohawk children to the corresponding age and gender data from the Second National Health and Nutrition Examination Survey (NHANES II). Weight, height, triceps and subscapular skinfold thickness, and waist and hip circumferences were measured in 527 children. SUBJECTS/SETTING: All children in grades 1 to 6 (aged 6 to 11 years) in the 3 elementary schools of 2 Mohawk communities in Canada, for whom parental consent was obtained, were enrolled in the present study. There were no exclusion criteria. With a participation rate of 83%, the 527 children enrolled in this study represent an unbiased sample of the population from 2 Mohawk territories. RESULTS: Compared with children studied in NHANES II, Mohawk children were similar in height and triceps skinfolds but were generally heavier, had thicker subscapular skinfolds, and had greater waist and hip circumferences. These differences were greater in older children. Mohawk children who had extreme-high weight values compared with their population means were heavier than their NHANES II counterparts. APPLICATIONS/CONCLUSIONS: Results indicated that, on average, Mohawk children seem to be slightly heavier than children in NHANES II. Except for those with extreme overweight values, Mohawk children show less variation of weight and body mass index than children in NHANES II. Finally, overweight Mohawk children seem to be more likely to carry their excess body fat truncally, compared with overweight children from NHANES II. Health practitioners working with Native American populations should be careful when assessing childhood obesity. Simple comparisons of weight or body mass index with NHANES standards may lead to inappropriate risk assessments.     

高效液相色谱法测定绿茶和饮料中的咖啡因

采用反相高效液相色谱法，固定相为十八烷基硅烷键合硅胶，以乙腈-水(20：80)为流动相，检测波长274nm，测定绿茶和饮料中的咖啡因含量。结果线性范围为3．9～3900ng，r=O.9999；绿茶和2种饮料的平均加样回收率分别为100．2％、100．1％和99．8％。该方法准确、简便、快速，适合绿茶和可乐型饮料中咖啡因的测定。     

银杏叶黄酮类化合物的研究进展

综述了近年来对银杏叶黄酮类化合物提取工艺、测定方法、应用等方面的研究进展，为开发利用银杏叶黄酮类化合物提供依据。     

Haemoptysis in healthy children due to unsuspected foreign body

Abstract: Haemoptysis in otherwise healthy children is an uncommon event. Two cases of massive haemoptysis, subsequently requiring lobectomy, are discussed. In each case, foreign vegetable matter was identified despite previously normal bronchoscopy and minimal changes on chest radiograph.     

Actuarial survival in the premature infant less than 30 weeks' gestation

OBJECTIVE: Because survival from admission to discharge does not provide parents and physicians information about future life expectancy in the premature neonate, we characterized the actuarial survival, defined as the future life expectancy from a given postnatal age, in a large inborn population of premature infants < 30 weeks' gestation. STUDY DESIGN: We determined daily actuarial survival of 1925 inborn infants (23 to 29 weeks' gestation) admitted to the Baylor Affiliated Nurseries from July 1986 through December 1994, stratified by 100-g birth weight and by 1-week gestational-age intervals. RESULTS: In the 501- to 600-g birth weight stratum, actuarial survival improved from 31% at birth, to 61% on day of life 7, and then to 75% on day of life 28; in the 901- to 1000-g birth weight stratum, actuarial survival improved from 88%, to 94%, and then to 98% throughout the same times, respectively. Similar trends were obtained when data were stratified by gestational age. CONCLUSIONS: Survival in the smallest infants improves dramatically during the first few days of life, but there is a significant risk for late death in the smallest of these infants.     

外源核苷酸对免疫抑制小鼠胸腺细胞DNA损伤的影响

目的:检测外源核苷酸对经环磷酰胺诱导的免疫抑制小鼠胸腺细胞DNA损伤的影响。方法:采用18～20 g昆明种小鼠30只,雌雄各半,随机分成阴性对照组(NEC)、阳性对照组(POC)和核苷酸组(NTG),每组10只。NEC组和POC组小鼠均饲喂半纯合无核苷酸的基础日粮,NTG组则在基础日粮中添加0.25%的核苷酸,实验期为21 d。在实验结束前18 h POC组和NTG组小鼠按照150mg/kg bw的剂量腹腔注射环磷酰胺,NEC组注射生理盐水,实验结束时测定脾脏和胸腺脏器指数,并取胸腺细胞,做单细胞凝胶电泳,观察细胞DNA损伤情况。结果:在基础日粮中添加核苷酸对小鼠免疫器官重量没有显著影响(P>0.05),但能极显著降低受损胸腺细胞百分率(P<0.01)和受损细胞DNA尾长(P<0.01)。结论:外源核苷酸能显著降低免疫抑制小鼠受损胸腺细胞百分率和损伤程度。     

自然流产妇女弓形虫感染的调查研究

目的　探讨自然流产妇女与弓形虫 (Tox)感染的相关性。方法　采用酶联免疫吸附试验(EL ISA)对自然流产的 4 76例孕妇外周血进行了弓形虫循环抗原 (CAg)和特异性抗体 (Tox- Ig M,Tox- Ig G)的检测 ,并和正常妊娠妇女作比较 ;应用聚合酶链反应 (PCR)技术对经 EL ISA测定为阳性的 1 4例孕妇流产物进行 Tox- DNA检测。结果　流产组 CAg,Tox- Ig M,Tox- Ig G等阳性率分别为 5 .2 5 % ,6 .30 % ,1 1 .76 % ,其中 CAg及 Tox- Ig M阳性率与正常孕妇相比 ,差异有非常显著性 (P<0 .0 1 ) ;1 4例流产物中 Tox- DNA阳性 8例 ,阳性率为 5 7.1 4 %。结论　 Tox可通过胎盘传给胎儿 ,引起流产 ;孕妇急性感染与自然流产有相关性 ,CAg,Tox- Ig M,CAg+Tox- Ig M阳性率与发生流产次数呈正相关     

自我效能感与晕船症状的相关研究

目的探讨自我效能感与晕船症状的相关,以期寻找影响晕船的心理因素.方法对某院校参加海上实习的123名医疗本科学员用一般自我效能感量表、晕船自我效能感量表于出海作业前进行施测,用晕船症状评分量表于出海作业返回后进行评估.结果晕船自我效能感与晕船症状显著负相关(r=-0.470,P＜0.01),而一般自我效能感量表与晕船症状的相关无统计学意义(r=-0.102,P＞0.05).结论晕船自我效能感可能为个体发生晕船的心理影响因素之一.     

Prognostic significance of tumor necrosis in ovarian cancer patients treated with neoadjuvant chemotherapy and interval surgical debulking

The objective of this study was to study the significance of tumor necrosis documented at the time of interval surgical debulking after neoadjuvant chemotherapy. Retrospective chart reviews were carried out from 1997 to 2005 to identify ovarian cancer patients treated with neoadjuvant chemotherapy. Patients' demographics together with disease characteristics, treatment-related variables, and outcomes were recorded. Cox proportional hazard models were built to model time to progression using predictor variables such as age, cancer stage, tumor grade, residual disease, percentage change in CA125 level from baseline, and degree of necrosis in resected tumor specimens. One hundred one patients were included in the study. Optimal debulking was achieved in 74% of the patients. Cox regressions revealed three significant predictive variables of time to first progression: younger age (hazard ratio [HR] = 0.95, 95% CI 0.92-0.98, P= 0.004), residual disease (P= 0.048), and the absence/minimal tumor necrosis after three cycles of neoadjuvant chemotherapy (HR = 1.97, 95% CI 1.01-3.87, P= 0.048). The estimated median survival was 50.66 months (95% CI 46.12-55.20). The lack of or minimal tumor necrosis after neoadjuvant chemotherapy is an independent risk factor for recurrent disease.