I agree with Bill. However, the jury is still out on the actual significance of Barretts - they don't know for sure what makes it 'turn' and therefore they cannot reliably identify the "at risk" group. As Bill says, if you have poor symptom control you would probably have more peace of mind having frequent scopes. If you have good symptom control then having to go for frequent scopes may cause undue and unnecessary stress and anxiety. I definitely have Barretts, which didn't progress over 12 months despite a period of very poor symptom control - I haven't been told when to get retested but every 3 years is typical here in the UK if nothing else changes. If you have worsening symptoms you'll get scoped for the symptoms rather than the Barretts. If you develop any "red flag" symptoms such as anaemia or difficulty swallowing, then you will get rescoped quickly, Barretts or no Barretts!
New stuff: GERD, Recurrent cystitis/Overactive bladder
Lifelong stuff: Food allergies/intolerance, eczema, asthma