data aaa;
input group n;
cards;
1 0
;
run;
data bbb;
set aaa;
length grpcat $50. grp2 $50.;
do k=1 to 2;
if k=1 then grpcat="N(Nmiss)";
if k=2 then grpcat="Mean±Std";
if n ne 0 then do;
if k=1 then grp2=strip(put(n,8.0))||"("||strip(put(nmiss,8.0))||")";
end;
else do;
if k=1 then grp2=strip(put(n,8.0));
end;
output;
end;
run;