Table 1.

Performance Metrics of the Algorithm With Various Modifications, Including Adjustment of the Delta Factor and the Addition of Upper and Lower Limits

Delta	No Upper and Lower Thresholds			Lower (> 30 mm Hg) and Upper (< 200 mm Hg) Thresholds
	Sensitivity (%)	Specificity (%)	MCC	Sensitivity (%)	Specificity (%)	MCC
1× deltas	92.31	98.75	0.39	97.48	98.59	0.40
0.4× deltas	94.96a	98.02a	0.34	97.48	98.02	0.35
1.3× deltas	93.28b	98.68b	0.40	97.48a	98.68a	0.41
2× deltas	91.60	98.72	0.40	96.64b	98.72b	0.42
4× deltas	86.55	98.72	0.37	95.80	98.72	0.41

MCC = Matthew correlation coefficient.

^aSensitivity and specificity optimized.

bMCC optimized

.