Hi, I am new to multiple imputation and I am trying to impute data in two different variables. In my dataset I have 10 variables, 8 of them are complete and 2 contains missing data. Of these two, variable1 contains continous data and variable2 categorical (0/1). About 20% of data for variable1 (continous data) is missing. Values in this variable(variable1) ranges from 1 to 70. When I am imputing I recieve negative some values in variable1. I am probably doing something wrong in the settings fro PROC MI or can it be negative if all values are positive? Thanks! /Thomas ... View more

Hi, I have issues writning a formula to solve the following equation in SAS. I have the following 10 observations (below). Var1 is unknown ( Var1 have the same for all observations) Var2 is known. The value for Var3 for each observation is calculated using the following formula (EXP(Var1+Var2)/(1+EXP(Var1+Var2)) Known is also that the sum of Var3 for all ten observations is 5. This means that Var1 is about -0.56. I now want SAS to automatic solve X for me Thanks for help! /Thomas obs var1 var2 var3 1 X 0.1 EXP(X+0.1)/(1+EXP(X+0.1)) 2 X 0.2 EXP(X+0.2)/(1+EXP(X+0.2)) 3 X 0.3 EXP(X+0.3)/(1+EXP(X+0.3)) 4 X 0.4 EXP(X+0.4)/(1+EXP(X+0.4)) 5 X 0.5 EXP(X+0.5)/(1+EXP(X+0.5)) 6 X 0.6 EXP(X+0.6)/(1+EXP(X+0.6)) 7 X 0.7 EXP(X+0.7)/(1+EXP(X+0.7)) 8 X 0.8 EXP(X+08)/(1+EXP(X+0.8)) 9 X 0.9 EXP(X+0.9)/(1+EXP(X+0.9)) 10 X 1.0 EXP(X+1.0)/(1+EXP(X+1.0)) ... View more

Hi, I have a dataset with some missing information and have performed av PROC MI generating 5 datasets and further estimated p-score for these. Are there any way of pooling/avaraging the p-score from these 5 datasets and match to a control using the avaraged p-score? Any procedure in SAS that could handle this? Thanks /Thomas ... View more