Here, 97% accuracy refers to a c-statistic (area under the ROC curve) of 0.9740. An example operating point would be 98% sensitivity with 90% specificity.
For reducing false positives, rather than starting with the general population, it'd be natural to start with a higher risk sub-group, e.g., people with a high CHA2DS2-Vasc score.
Earlier this week, Circulation published a review screening for atrial fibrillation:
circ.ahajournals.org/content/135/19/1851.full?ijkey=StzSPk8eljGaP2G&keytype=ref
For reducing false positives, rather than starting with the general population, it'd be natural to start with a higher risk sub-group, e.g., people with a high CHA2DS2-Vasc score.
Earlier this week, Circulation published a review screening for atrial fibrillation: circ.ahajournals.org/content/135/19/1851.full?ijkey=StzSPk8eljGaP2G&keytype=ref