Table 3. Associations between echocardiography and ^99mTc-PYP scintigraphy parameters.

Variable	Group	Positive PYP* (95% CI)	P value	H/CL ratio (95% CI)	P value
LV mass	ATTRwt	60.96 (−35.68 to 157.59)	0.210	71.19 (18.94 to 123.43)	0.009
	ATTRm	111.21 (30.51 to 191.91)	0.009	134.52 (63.90 to 205.13)	0.001
IVSd	ATTRwt	0.339 (0.028 to 0.650)	0.034	1.95 (1.26 to 2.63)	0.001
	ATTRm	0.48 (0.18 to 0.77)	0.003	0.46 (0.18 to 0.73)	0.002
LV Mass Index	ATTRwt	29.69 (−14.53 to 73.91)	0.200	36.11 (14.33 to 57.89)	0.002
	ATTRm	64.77 (26.92 to 102.62)	0.002	67.81 (37.33 to 98.29)	0.001
LVPWd	ATTRwt	0.27 (−0.04 to 0.58)	0.100	0.34 (0.18 to 0.50)	0.001
	ATTRm	0.49 (0.23 to 0.75)	0.001	0.49 (0.25 to 0.73)	0.001

^*Positive PYP includes results yielding grade 2 or 3.

ATTRm, hereditary transthyretin amyloidosis; ATTRwt, wild type transthyretin amyloidosis; H/CL, heart-to-contralateral lung (ratio); IVSd, interventricular septal thickness at end-diastole; LV, left ventricular; LVPWd, left ventricular posterior wall thickness at end-diastole; 99mTc-PYP, technetium-99m pyrophosphate; PYP, pyrophosphate.