Thank you,   Is there a way to have the confidence interval with proc univariate? ... View more

Hi   Thank you for your reply,  Here is my proc glm:   proc glm data= CRCT_DATAI; class gender (ref = 'Woman') cGPA (ref = '3.3-3.7') Lev_educ (ref = "Bachelor's degree") Geo_setting (ref = 'Urban') Focuscare (ref = "General musculoskeletal care (spine and extremities)") style (ref = 'Pragmat'); model KABQ_Knowledge = age gender cGPA Lev_educ Geo_setting Focuscare style/ solution ss3 ; run;   The output says:  Number of observation read: 127 Number of Observation used: 49 However, when I used simple regression, almost all data was used!   Thank you, Owis ... View more