Complex sentence: That is, there is a basal level of proteinuria which below 30mg/day which is considered non-pathologic, and values between 30-300mg/day which is termed microalbuminuria which is considered pathologic.
Split into simpler sentences: That is, there is a basal level of proteinuria that can occur below 30mg/day which is considered non-pathologic. Values between 30-300mg/day are termed microalbuminuria which is considered pathologic.