Table 3.

Degree of over and under estimation at various percentage discrepancy values

Percentage Discrepancy	Pulmonary Artery Systolic Pressure			Tricuspid Regurgitation Gradient
	Total with Discrepancy	Overestimate	Underestimate	Total with Discrepancy	Overestimate	Underestimate
5%	533 (86.2%)	335 (62.9%)	198 (37.1%)	540 (87.4%)	284 (52.6%)	256 (47.4%)
10%	466 (75.4%)	303 (65.0%)	163 (35.0%)	464 (75.1%)	243 (52.4%)	221 (47.6%)
20%	336 (54.4%)	241 (71.7%)	95 (28.3%)	335 (54.2%)	188 (56.1%)	147 (43.9%)
30%	233 (37.7%)	184 (79.0%)	49 (21.0%)	232 (37.5%)	147 (63.4%)	85 (36.6%)
40%	165 (26.7%)	141 (85.5%)	24 (14.5%)	158 (25.6%)	109 (69.0%)	49 (31.0%)
50%	119 (19.3%)	111 (93.3%)	8 (6.7%)	102 (16.5%)	79 (77.5%)	23 (22.5%)

Values represent n (percent).