Table 1

 Detection of atrial fibrillation on 12 lead electrocardiogram

Reference standard
Atrial fibrillationNot atrial fibrillationTotal
General practitioner
Atrial fibrillation79114193
Not atrial fibrillation2012391259
Uncertain022
Total9913551454
Primary care nurse
Atrial fibrillation74198272
Not atrial fibrillation2211271149
Uncertain055
Total9613301426
Interpretative software
Atrial fibrillation17921200
Not atrial fibrillation2622212247
Uncertain1099109
Total21523412556
General practitioner and interpretative software
Both positive71374
Only software positive12719
Only general practitioner positive8111119
Both negative812341242
Total9913551454