A data frame with 500 observations on the following 8 variables.
crp
a numeric vector, C-reactive protein measured in mg/l, with missing values
vaso
a factor with two levels Yes
No
, indicating the use of vasopressor or not
wbc
a numeric vector, white blood cell count
lac
a numeric vector, serum lactate
age
a numeric vector, age in years
type
a factor with levels surgery
medical
emergency
gender
a factor with levels female
male
mort
an integer with two values 1
0