Table 8.

Comparison of manual electrocardiographic detection of atrial fibrillation with ICD-9 codes for atrial fibrillation.^a

ICD-9b codes	Manual atrial fibrillation status
	Atrial fibrillation	No atrial fibrillation	Total
Atrial fibrillation	16	7	23
No atrial fibrillation	9	18	27
Total	25	25	50

^aThe sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 64% (95% CI 43%-82%), 72% (95% CI 50%-88%), 70% (95% CI 53%-82%), 67% (95% CI 53%-78%), and 68% (95% CI 53%-80%), respectively.

^bICD-9: International Classification of Diseases, 9th edition.