Acoustic cardiography to improve detection of coronary artery disease with stress testing

Table 4 Diagnostic performances of ECG versus heart sounds in 59 patients (40 men, 19 women)

Parameter	Group	Sensitivity (%)	Specificity (%)	PLR	NLR
ST depression	All	29 (CI 17-46)	92 (CI 75-98)	3.68 (CI 0.88-15.3)	0.77 (CI 0.60-0.98)
ST depression	Men	28 (CI 14-48)	93 (CI 70-99)	4.2 (CI 0.57-30.9)	0.77 (CI 0.58-1.02)
ST depression	Women	33 (CI 12-65)	90 (CI 60-98)	3.33 (CI 0.42-26.58)	0.74 (CI 0.45-1.23)
S4 present	All	53 (CI 37-69)	92 (CI 75-98)	6.62 (CI 1.7-25.9)	0.51 (CI 0.35-0.74)
S4 present	Men	52 (CI 34-70)	93 (CI 70-99)	7.8 (CI 1.13-53.8)	0.51 (CI 0.34-0.79)
S4 present	Women	56 (CI 27-81)	90 (CI 60-98)	5.56 (CI 0.79-39.01)	0.49 (CI 0.23-1.06)
S4 or ST-depression	All	68 (CI 51-81)	84 (CI 65-94)	4.23 (CI 1.7-10.7)	0.39 (CI 0.23-0.65)

PLR: Positive likelihood ratio; NLR: Negative likelihood ratio.