Would bloods for autoimmune screen ANA double stranded DNA ENA anca still show positive if there had been an autoimmune response even 6 years ago?

See below. You also have to take in account that these panels frequently have false positives and assays vary from lab to lab. It is has been estimated that up 30% of all anas drawn are false positives. Only your doctor or your rheumatologist can interpret these results in context with your history and symptoms.