TABLE 3.

Sensitivity, specificity, and positive predictive value (PPV) of Medicare hospitalization records containing ICD9 discharge code 410 (excluding 410.x2), 411.1, or 413 in selected discharge code positions to identify an MI when compared with the ARIC classification of definite or probable MI

	Definite or Probable MI
	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	Kappa (95%CI)
410 or 411.1 or 413 (any)	0.73 (0.70, 0.76)	0.946 (0.943, 0.950)	0.39 (0.36, 0.41)	0.48 (0.45, 0.50)
410 or 411.1 (any)	0.71 (0.68, 0.74)	0.961 (0.957, 0.964)	0.46 (0.43, 0.48)	0.53 (0.51, 0.55)
410 or 411.1+ or 413+ (any)	0.69 (0.66, 0.72)	0.964 (0.961, 0.967)	0.47 (0.44, 0.50)	0.54 (0.51, 0.56)
410 or 411.1+ (any)	0.69 (0.66, 0.72)	0.969 (0.967, 0.972)	0.51 (0.48, 0.54)	0.56 (0.54, 0.59)
410 or 411.1+ or 413+ (≤5)	0.68 (0.65, 0.71)	0.966 (0.963, 0.969)	0.48 (0.46, 0.51)	0.54 (0.52, 0.57)
410 or 411.1+ (≤5)	0.68 (0.65, 0.71)	0.971 (0.968, 0.973)	0.52 (0.49, 0.55)	0.57 (0.54, 0.59)
410 or 411.1+ or 413+ (≤3)	0.65 (0.62, 0.68)	0.970 (0.967, 0.972)	0.50 (0.47, 0.53)	0.55 (0.52, 0.57)
410 or 411.1+ (≤3)	0.65 (0.62, 0.68)	0.974 (0.971, 0.976)	0.54 (0.51, 0.57)	0.57 (0.54, 0.59)
410 or 413+ (any)	0.64 (0.61, 0.67)	0.980 (0.978, 0.982)	0.60 (0.57, 0.63)	0.60 (0.57, 0.62)
410 (any)	0.63 (0.60, 0.66)	0.985 (0.984, 0.987)	0.67 (0.64, 0.70)	0.63 (0.61, 0.66)
410 (≤5)	0.62 (0.59, 0.66)	0.986 (0.985, 0.988)	0.68 (0.65, 0.71)	0.63 (0.61, 0.66)

Note: Discharge code positions are in parentheses. Codes 411.1⁺ and 413⁺ indicate that revascularization procedure codes (00.66, 36.0, 36.1, 88.5, 99.10, or 37.2) were included on the same record as discharge codes 411.1 or 413, respectively. ICD Codes: 410–Acute myocardial infarction, 411–Other acute and subacute forms of ischemic heart disease, 413–Angina Pectoris