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首页 > 医学词汇大全 > linear regression
linear regression

肿瘤

关键词肿瘤 临床研究术语 统计学

词汇介绍

拓展阅读

解析

Linear   英 /ˈlɪniə(r)/   美 /ˈlɪniər/

释    义   adj. 线的,线型的;直线的,线状的;长度的

同根词   linearly adv. 成直线地;在线上地

               linearity n. 线性;线性度;直线性

               linearize vt. 使线性化

               linearise vt. 使直线化(等于linearize)

例    句   Even putting this data together in a linear way, you can come up with the most powerful source for any business in how and where it engages its customers. 即使以线性方式将这些数据汇总在一起,对于任何企业如何以及在何处接洽客户,你也能为其提供最强有力的信息来源。

 

Regression   英 /rɪˈɡreʃn/   美 /rɪˈɡreʃn/

释    义   n. 回归;退化;逆行;复原

同根词   regressive adj. 回归的;后退的;退化的

               regress n. 回归;退回

               regress vi. 逆行,倒退;复归

               regress vt. 使…倒退

例    句   If your regression tests are automated, then go ahead and run all of them all the time. 如果你的回归测试是自动执行的,那么你可以在同时运行所有测试。

概述

在很多医学科研实践中,常常需要对两个变量间的关系进行研究,例如血压与年龄的关系、糖尿病患者的血糖与胰岛素水平的关系等。在两个变量的资料中,如果一个变量y随另一个变量x呈现出线性变化规律,则两变量间便构成了一种线性依存关系,而揭示这种关系的有效统计学方法及时线性回归。 根据变量的多少又可以分为一元线性回归和多元线性回归,其中一元回归是只有一个变量,就y与x之间具有线性关系;多元回归分析是y与x1、x2、....xk之间分别具有线性关系。进行线性回归分析的软件有R语言、SPSS等,最简

Heterogeneity index evaluated by slope of linear regression on 18F-FDG PET/CT as a prognostic marker for predicting tumor recurrence in pancreatic ductal adenocarcinoma复制标题

以18F-FDG PET/CT线性回归斜率评价异质性指数作为预测胰腺导管腺癌肿瘤复发的预后指标

发表时间:2017-06-20

影响因子:7.2

作者: Yong-il Kim

期刊:Eur. J. Nucl. Med. Mol. Imaging

A total of 93 pancreatic ductal adenocarcinoma patients (M:F = 60:33, mean age = 64.2 ± 9.1 years) who underwent preoperative 18F-FDG PET/CT following pancreatic surgery were retrospectively enrolled. The standardized uptake values (SUVs) and tumor-to-background ratios (TBR) were measured on each 18F-FDG PET/CT, as metabolic parameters. Metabolic tumor volume (MTV) and total lesion glycolysis (TLG) were examined as volumetric parameters. The coefficient of variance (heterogeneity index-1; SUV mean divided by the standard deviation) and linear regression slopes (heterogeneity index-2) of the MTV, according to SUV thresholds of 2.0, 2.5 and 3.0, were evaluated as heterogeneity indices. Predictive values of clinicopathologic and 18F-FDG PET/CT parameters and heterogeneity indices were compared in terms of pancreatic cancer recurrence.

译文

回顾性分析93例胰腺导管腺癌患者(M:F=60:33,平均年龄64.2±9.1岁)在胰腺手术后接受18F-FDG PET/CT检查。在每一个18F-FDG PET/CT上测量标准化摄取值(SUVs)和肿瘤背景比(TBR)作为代谢参数。以代谢性肿瘤体积(MTV)和总病变糖酵解(TLG)为体积参数。根据SUV阈值2.0、2.5和3.0,评价MTV的变异系数(异质性指数-1;SUV均值除以标准差)和线性回归斜率(异质性指数-2)作为异质性指数。比较临床病理学和18F-FDG PET/CT参数及异质性指数对胰腺癌复发的预测价值。