search for: bilirubin

Among others, datam contains the columns: logconc, tm, dose, subj, bilirubin. None of these are factor variables. The following compartment models work (the first still has not converged after 100 interations): res1 <- nlme(logconc~p2+p3+log(dose/(exp(p1)-exp(p2))* (exp(-exp(p2)*tm)-exp(-exp(p1)*tm))),start=list(fixed=c(5,-2,-0.1)), fixed=list(p1+p2+p3~1),control=lis...

Hello, I am trying to find an R function to compute 'direct adjusted survival' with standard errors. A SAS-macro to do this is presented in Zhang X, Loberiza FR, Klein JP, Zhang MJ. A SAS macro for estimation of direct adjusted survival curves based on a stratified Cox regression model. Comput Methods Programs Biomed 2007;88:95-101. It appears that this method is not implemented in R.

...tains the flawed default for lack of a better idea. When teaching a class on this, I tell listeners "bite the bullet" and build the newdata that makes clinical sense, because package defaults are always unwise for some of the variables. How can a package possibly know that it should use bilirubin=1.0 (upper limit of normal) and AST = 45 when the data set is one of my liver transplant studies? Frank Harrell would argue that his "sometimes misguided" default in cph is better than the "almost always wrong" one in coxph though, and there is certainly some strength in that...

...ence of a mutation." "Tumor is KRAS negative" "KRAS (mutated)" "Tumor is positive for KRAS mutation" And here's an example of something I want to ignore. "Will conduct KRAS testing prior to initiation of therapy. ... (Several lines of material) ... Bilirubin positive." A couple of things stand out here. The first is that I need to be able to pick up on variations of the relevant terms. So, for example, that means being able to identify that either "mutant" or "mutated" came in close proximity to "KRAS". The other t...

Mª Luz, si el comando de Carlos te devuelve 0 es que no hay NA's. Da igual que tus columnas sean caracteres o número. Lo que intuyo es que tienes celdas con la frase "NA" que interpretas como NA. Mandanos el summary de tu data.table y lo vemos... ----- Mensaje original ----- De: "MªLuz Morales" <mlzmrls en gmail.com> Para: "Carlos J. Gil Bellosta"