利用rms包points_cal函数计算列线图每个患者的得分

作者: 灵活胖子的进步之路 | 来源:发表于2020-10-09 06:53 被阅读0次

用法如下

library(rms)

TotalPoints.rms(rd, fit, nom, kint = NULL)

首先载入rms包，rd为原始数据的data.frame，fit为构建列线图时候的函数，kint没录入过，示例如下

library(rms)
n <- 1000    
set.seed(17) 
d <- data.frame(age = rnorm(n, 50, 10),
                blood.pressure = rnorm(n, 120, 15),
                cholesterol = rnorm(n, 200, 25),
                sex = factor(sample(c('female','male'), n,TRUE)))

d <- upData(d,
            L = .4*(sex=='male') + .045*(age-50) +
              (log(cholesterol - 10)-5.2)*(-2*(sex=='female') + 2*(sex=='male')),
            y = ifelse(runif(n) < plogis(L), 1, 0))

ddist <- datadist(d); options(datadist='ddist')

f <- lrm(y ~ lsp(age,50) + sex * rcs(cholesterol, 4) + blood.pressure,
         data=d)
nom <- nomogram(f)
res<-TotalPoints.rms(rd = d,fit = f,nom = nom)

head(res)