Hi everyone,
I would like to calculate Standardized Difference.
I found that I can calculate Standardized Mean Difference (SMD) with PROC PSMATCH, but it's also calculate SMD for categorical variables and I don't understand how.
I have a sample with 155 subjects, 77 in GROUPE 1 and 78 in GROUPE 2.
proc format;
value sexe
1 = "Masculin"
2 = "Féminin";
value groupe
1 = "Groupe 1"
2 = "Groupe 2";
run;
proc psmatch data=table;
class groupe sexe;
psmodel groupe(Treated='Groupe 2')= age taille poids sexe;
assess lps var=(age sexe taille poids) / plots=all weight=none;
run;
OUTPUT of PROC PSMATCH :
Description of SEXE's variable:
I have Standardized Mean Difference for quantitave variable (age, taille and poids) in the row ALL. But how SAS find 0.32697 for the SEXE's variable ?
Thank you.