TABLE 4

Univariate and Multivariate Predictors of Cardiac Death or Myocardial Infarction

Parameter	Univariate	Multivariate
Parameter	Univariate			Clinical data	Model 1	Model 2	Model 3
Clinical characteristics
Male patient	1.8 (0.9–3.6)	NS	NS	NS	NS
Previous infarction	1.5 (0.7–2.9)	NS	NS	NS	NS
Diabetes mellitus	2.6 (1.2–5.5)	2.6 (1.3–5.1)	2.6 (1.3–5.2)	2.3 (1.1–4.8)	2.2 (1.1–4.5)
Hypertension	1.3 (0.6–2.5)	NS	NS	NS	NS
Hypercholesterolemia	0.9 (0.4–1.9)	NS	NS	NS	NS
Smoking	3.3 (1.6–6.9)	2.5 (1.3–4.8)	2.1 (1.1–4.1)	2.7 (1.4–5.2)	NS
Heart failure	3.0 (1.3–6.7)	3.0 (1.5–6.0)	3.2 (1.6–6.4)	2.6 (1.3–5.5)	2.6 (1.3–5.4)
Left bundle branch block	3.7 (1.2–11)	NS	NS	NS	NS
Stress test results
Angina pectoris	1.2 (0.6–2.6)	—	NS	NS	NS
ST-segment changes	1.0 (0.5–2.1)	—	NS	NS	NS
Peak heart rate	0.8 (0.2–3.6)	—	NS	NS	NS
Scan parameters
Abnormal findings	7.8 (2.7–23)	—	9.0 (2.8–30)	—	—
Fixed defect	3.2 (1.5–6.8)	—	—	2.9 (1.5–5.8)	—
Reversible defect	2.7 (1.3–5.5)	—	—	3.9 (2.0–7.7)	—
Summed stress score/10	15.1 (5.3–47)	—	—	—	13.1 (4.1–42)
Total χ²		27	45	51	36
Incremental value over clinical data			P < 0.0001	P < 0.0001	P < 0.001

NS = not significant; — = variable excluded.
Data are Cox proportional hazard ratio, with 95% confidence interval in parentheses. In model 1, the variable entered was the presence of an abnormal scan; in model 2, the presence of a fixed or reversible defect was entered; in model 3, the summed stress score was entered.