Table 3. Reclassification table stratified by SPECT findings.

a. Models containing visual scores on 3-h anterior planar images
Model without H/M ratio	Model with H/M ratio
Probability	<50%	50–80%	>80%	Total
Patients with positive PYP SPECT
<50%	10	1	0	11
50–80%	2	18	8	28
>80%	0	0	14	14
Total	12	19	22	53
Patients with negative PYP SPECT
<50%	105	0	0	105
50–80%	3	8	1	12
>80%	0	0	0	0
Total	108	8	1	117
Net reclassification improvement	0.56 (95% CI, 0.25–0.87; P <0.001)
Integrated discrimination improvement	0.038 (95% CI, 0.005 to 0.072; P = 0.026)

b. Models containing visual scores and H/CL ratio on 3-h anterior planar images
Model without H/M ratio	Model with H/M ratio
Probability	<50%	50–80%	>80%	Total
Patients with positive PYP SPECT
<50%	40	2	0	42
50–80%	0	0	0	0
>80%	1	2	8	11
Total	41	4	8	53
Patients with negative PYP SPECT
<50%	9	3	0	12
50–80%	0	0	1	1
>80%	0	8	96	104
Total	9	11	97	117
Net reclassification improvement	0.49 (95% CI, 0.18 to 0.81; P=0.003)
Integrated discrimination improvement	0.036 (95% CI, 0.004 to 0.069; P=0.029)

CI, confidence interval