Hi all, I am new in SAS. I am using mixed model for repeated measurement. some values of dependent variable for few sample ids are missing. But  values of independent variables of the same sample ids are present. For example, Blood pressure -dependent variable- 5 sample ids Blood pressure are missing Smoking, BMI -independent variable- values are present for the same 5 samples   what does proc mixed model do for these 5 samples? Does if exclude all these 5 samples? ... View more