Decision support systems--a general practice research journey.

'Mr Jones has a high cardiovascular disease (CVD) risk based on the online calculator you used a few months ago. You now have a CVD risk calculator embedded in your desktop clinical information system, which surprisingly calculates that Mr Jones is now 'low risk'. Even with risk assessment involving many variables, and allowing for rounding and assumptions, this difference is disconcerting. You start to wonder about the automated computer system prompts...'