Age Estimation in Indians Using Demirjian’s 8‐teeth Method

Abstract: Demirjian’s grading of tooth calcification is widely used to assess age of individuals with developing dentitions. However, its application on numerous populations has resulted in wide variations in age estimates and consequent suggestions for the method’s adaptation to the local sample. Conventionally, Demirjian’s method utilized seven mandibular teeth on the left side. A recent modification incorporated the third molar with a view to apply the method on a wider age‐group. Moreover, the revised method developed regression formulas for assessing age. This paper tested the 8‐teeth method using 547 Indians (348 females, 199 males) aged 7–25 years. Demirjian’s formulas resulted in inferior age prediction in Indians (9.2% misclassification at 99% confidence interval vs. 0% misclassification in the original study); therefore, India‐specific regression formulas were developed, which gave better age estimates (mean absolute error, MAE = 0.87 years) than the original formulas (MAE = 1.29 years). This suggests that Demirjian’s 8‐teeth method also needs adaptation prior to use in diverse populations.     

ECFA对两岸贸易与台湾经济增长的影响研究——基于联立方程组模型的模拟分析

本文构建了包含消费、投资、出口和国民收入恒等式在内的联立方程组模型,选取1980—2008年的时间序列数据,采用二阶段最小二乘法考察了两岸贸易对台湾经济增长的影响。结果显示,两岸贸易对台湾经济具有较强的拉动作用,并且台湾自大陆进口能够＂创造需求＂,其对台湾经济增长的拉动作用强于台湾对大陆出口。在此基础上,以2008年为模拟基期,以2013年为模拟期,模拟了ECFA早期收获清单的实施对两岸贸易及台湾经济增长的影响。模拟结果显示,ECFA早期收获清单的实施无论对两岸贸易还是整个台湾经济都具有较为显著的增长效应。     

农民的腐败容忍度与其对村民自治参与的影响——基于两省六市的实证研究

文章利用浙江、山东两省六市调研的一手数据,运用spss软件对数据进行因子分析并采取多元线性回归模型对目前农民的腐败容忍度与村民自治参与的关系展开分析.研究发现:农民对腐败的基本认知、对于腐败行为的容忍度与村民自治参与呈现显著的负相关,农民采取反腐行为的容忍度与抗议型参与、公共型参与成正相关,与体制型参与成负相关.     

肝癌并发上消化道出血的危险舌象分析

目的:以望舌为主了解原发性肝癌并发上消化道出血的危险因素,为临床预防提供依据。方法:收集737例原发性肝癌患者的临床资料,并使用标准化舌象采集环境获取其临床舌象,由医学专家给出舌象诊断,使用条件Logistic回归对肝癌并发上消化道出血的危险因素进行筛选。结果:舌色按由淡白、淡红到红进行分类,结果显示上消化道出血的主要危险因素主要与肝癌临床分期(OR=3.607,P=0.000)、舌形异常(OR=3.295,P=0.005)、舌下脉形状(OR=1.558,P=0.008)和血清总胆红素水平(OR=1.008,P=0.015)有关;而舌色按紫与不紫进行分类,结果显示舌色也与肝癌并发上消化道出血密切相关(OR=1.989,P=0.047)。结论:舌体胖大、舌下脉增粗或迂曲、舌色见紫、肝癌临床分期进展和血清胆红素水平过高均为上消化道出血的危险因素,以舌象观察为主可望作为一种预测肝癌并发上消化道出血的简捷方法。     

Corporate Financial Performance and the Use of Takeover Defenses

This paper tests the hypothesis that the threat of a contested takeover improves corporate performance. This is done by a cross-sectional analysis of listed Danish firms with and without effective takeover defenses. Takeover defenses adopted by Danish firms mainly consist of dual class voting rights often in combination with foundation ownership. Using simultaneous equation estimation to deal with the problem of causation, the results show that unprotected firms do not outperform protected firms. This suggests that management in unprotected firms are disciplined by other corporate governance mechanisms than the market for corporate control, including the legal protection of shareholders.     

中国北方汉族女性鼻尖位置的推定

本文对49例沈阳地区汉族女性(年龄范围为17～19岁),头面部侧位X光片上的鼻尖点及其与颅骨的相互关系进行了研究。在X光片上所测得的数据,在IBM-PC/XT电子计算机上进行多元逐步回归分析,得出推定沈阳地区汉族女性(17～19岁)鼻尖位置的回归方程。其回归误差在2mm以内的占71.43～77.55％。     

根据X线片跖趾骨长宽度推算0～17岁个体身高年龄

本文通过1607例儿童青少年跖趾骨长度和宽度与身高和年龄的相关回归分析，发现两者之间呈高度正相关，相关系数γ=0．859～0．998，相关检验和回归检验P＜0．0025～0．0005，据此分别计算出各跖趾骨长度、宽度推算身高、年龄的直线回归方程，为法医学、人类学提供了基础资料。