
Baltimore and Ohio Railroad - Wikipedia
The Baltimore and Ohio Railroad (reporting mark BO) was the first steam-operated common carrier railroad and the oldest railroad in the United States. [1] . Construction of the line began …
RR值、OR值、HR值:临床研究中的3个“R”你都分清了吗? - 知乎
相对危险度RR(relative risk)、风险比HR(hazard ratio)、比值比OR(odds ratio),以上三个“R”值在临床研究领域有着广泛的应用,但对于不少临床新手来说,一看见这三个概念就容易 …
R军傻傻分不清,各种“R”概念辨析(RR,OR,HR,WR,AR)+95%CI解 …
RR (Relative Risk,相对危险度):暴露组结局发生率/非暴露组结局发生率之比,反映暴露组结局发生率的危险是非暴露组的多少倍,是一个关联强度的指标。RR值解读与OR值一样,值越 …
Baltimore and Ohio Railroad locomotives - Wikipedia
On the Baltimore and Ohio Railroad, locomotives were always considered of great importance, and the railroad was involved in many experiments and innovations. A Baltimore and Ohio …
看了这篇文章,总算彻底搞明白了RR值! - 知乎专栏
rr = 暴露组发病风险/非暴露组发病风险. 当然,rr不一定是发病的相对风险,也可以是其它事件(比如怀孕、残疾、死亡、不良事件等)的相对风险。 表1. 不同研究因素和结局的rr值含义. 显 …
OR (比值比)和RR (相对危险度)的的区别与联系 | Public Library of Bioinformatics
OR (比值比)指病例组中暴露与非暴露的比值和对照组中的比值的比,当该疾病率较低时,OR是RR的近似值。 除了能否计算发病率外,我们还需要思考对照组人群的选择,因为这将影 …
ORR、DCR、PFS、OS傻傻分不清?看这篇文就懂了! - 搜狐
2020年4月29日 · 肿瘤治疗的四大终点指标分别是客观缓解率(Objective Response Rate; ORR)、疾病控制率(Disease Control Rate; DCR)、无进展生存期( progression-free …
一文解析16个肿瘤临床终点(OS、PFS、ORR、DCR等) - 网易
2024年8月27日 · 肿瘤治疗指标:客观缓解率(ORR)、疾病控制率(DCR)、无进展生存期(PFS)和总生存期(OS),分为近期疗效治疗和远期疗效指标,近期疗效指标主要评估药 …
O Gauge Railroading Magazine – OGR Publishing, Inc
We publish a print and digital magazine chock full of great photos, O gauge layouts, how-to articles and regular columns by the OGR Staff. You will enjoy reading our magazine! 80 …
Baltimore and Ohio Railroad (B&O) | History & Facts | Britannica
Baltimore and Ohio Railroad (B&O), first steam-operated railway in the United States to be chartered as a common carrier of freight and passengers (1827). The B&O was established by …