I don't understand your question .
You could use ROUND() function to round 5 scale ,like :
baseline_SBP = round(baseline_SBP ,5);
Or you would like to see a UNITS statement in PROC LOGISTIC as in PROC GENMOD ?
And better post it at Statistic Forum since your question is about it,
And
@StatDave @SteveDenham could have more/better idea.