restricted cubic splines

  1. C

    Help with Regression and Graphing in SPSS. Cubic splines?

    Hi Guys, I am looking at time to surgery and infection. Infection is dichotomous. I ran a graph looking at cumulative sum of infection and time to surgery and it looked somewhat like a logistic curve. Linear at about 4x in the first 6 hours to surgery and then tapers off to about y=x roughly...
  2. Phaedrus

    Interpretation of restricted cubic splines' coefficients

    Hi all, I was wondering whether there is a "not-very-obscure" interpretation of the coefficients (in a regression analysis, like logistic regression) of restricted cubic splines. I cannot think of any, but I am sure someone in this forum will have a better idea. Best, P.