Table 3.

Characteristics of the Exercise Treadmill Test

		ETT Test Findings
Test Characteristic	All (n = 110)	Normal Test (n = 76, 70%)	Inconclusive or Abnormal Test (n = 34, 30%)	p
Summary Measures
Total Test Time (minutes)	11.5±3.0	11.1+3.3	12.4+2.2	0.02
Target HR (beats/minute)	176.5±7.6	177.4+8.2	174.5+5.6	NS
% Achieved of Target HR (%)	92.7±7.5	91.2+7.2	96.0+7.0	0.01
Max Treadmill Speed (miles/hour)	4.5±0.7	4.4+0.8	4.6+0.6	NS
Max Treadmill Incline (%)	17.0±3.6	16.6+2.2	17.8+5.5	NS
Max Metabolic Equivalent Task (MET)	11.8±2.5	11.5+2.7	12.6+1.8	0.01
Heart Rate Measures
Initial	79.1+12.6	80.8+11.4	76.1+14.3	NS
Test-Peak	166.1±18.2	163.5+18.2	171.2+17.2	0.03
2-minute Recovery	135.4+20.3	133.5+20.4	139.6+19.6	NS
Blood Pressure Measures
Initial (Systolic)	129.9±15.5	129.6+16.8	130.8+12.4	NS
Initial (Diastolic)	79.0±11.4	78.8+11.3	79.5+12.0	NS
Test-Peak (Systolic)	167.9±27.5	166.5+27.9	171.6+26.5	NS
Test-Peak (Diastolic)	77.0±13.9	77.9+13.4	75.2+15.0	NS
2-minute Recovery (Systolic)	152.2±23.9	150.9+22.6	155.0+26.6	NS
2-minute Recovery (Diastolic)	75.2±15.4	76.1+15.6	73.4+15.2	NS
Oxygen Saturation Measures
Initial (%)	97.3±1.3	97.3+1.3	97.4+1.2	NS
Test-Peak (%)	92.3±4.4	92.9+4.2	91.3+4.7	NS
2-minute Recovery (%)	96.1±1.6	95.8+1.8	96.5+1.1	NS

ETT=exercise treadmill testing, NS=not statistically significant, bold values=statistically significant