Pretest Score for Predicting Microbubble Contrast Agent Use in Stress Echocardiography: A Method to Increase Efficiency in the Echo Laboratory
Table 2
Significant predictors of contrast agent use included in the final score model and the allocated score values.
Predictor
Univariate analysis
Multivariate analysis
Allocated score
Coefficient
value
OR (95% CI)
Coefficient
value
OR (95% CI)
Age ≥65
0.38
.001
1.46 (1.35–1.57)
0.28
.001
1.32 (1.21–1.44)
1
Male sex
0.21
.001
1.23 (1.14–1.32)
0.21
.001
1.23 (1.13–1.34)
1
Smoking
0.25
.001
1.29 (1.2–1.39)
0.12
.003
1.13 (1.04–1.23)
1
Multiple (2) risk factors for
0.5
.001
1.65 (1.53–1.79)
0.13
.005
1.13 (1.04–1.24)
1
25
0
25–30
—
—
—
0.57
.001
1.76 (1.57–1.98)
1
30–35
—
—
—
1.33
.001
3.79 (3.35–.26)
2
35–40
—
—
—
1.78
.001
5.94 (5.11–6.90)
3
40
—
—
—
2.12
.001
8.36 (6.92–10.09)
4
Dobutamine stress
0.96
.001
2.62 (2.43–2.83)
0.76
.001
2.13 (1.96–2.32)
1
Previous history of
0.49
.001
1.63 (1.50–1.78)
0.31
.001
1.36 (1.23–1.50)
1
Abnormal
0.28
.001
1.32 (1.23–1.43)
0.11
.01
1.11 (1.03–1.21)
1
BMI, body mass index; CAD, coronary artery disease; CI, confidence interval; ECG, electrocardiogram; OR, odds ratio. factors include hypertension, diabetes, hyperlipidemia, and family history of CAD. indicate not applicable. category is a BMI lower than 25. of dobutamine stress echocardiography compared with results of treadmill stress echocardiography. prior myocardial infarction and prior percutaneous coronary intervention or coronary artery bypass graft. those showing left ventricular hypertrophy, pathologic Q waves, left bundle branch block, or resting ST-T wave abnormalities.
