Table 2. Sensitivity, specificity, PPV, and NPV of T2* to predict non-diagnostic elastography at various cut-off points.

Cutpoint in T2* (ms)	Sensitivity (of non-diagnostic elastography patients, % with T2* ≤ given cutpoint) (%)	Specificity (of adequate elastography patients, % with T2* > given cutpoint) (%)	PPV (of patients with a T2* ≤ given cutpoint, % that had non-diagnostic elastography) (%)	NPV (of patients with a T2* > given cutpoint, % that had adequate elastography) (%)
34	32/32 (100.0)	2/63 (3.2)	32/93 (34.4)	2/2 (100.0)
32	32/32 (100.0)	3/63 (4.8)	32/92 (34.8)	3/3 (100.0)
30	32/32 (100.0)	5/63 (7.9)	32/90 (35.6)	5/5 (100.0)
28	32/32 (100.0)	11/63 (17.5)	32/84 (38.1)	11/11 (100.0)
26	32/32 (100.0)	17/63 (27.0)	32/78 (41.0)	17/17 (100.0)
24	32/32 (100.0)	22/63 (34.9)	32/73 (43.8)	22/22 (100.0)
22	32/32 (100.0)	29/63 (46.0)	32/66 (48.5)	29/29 (100.0)
20	32/32 (100.0)	37/63 (58.7)	32/58 (55.2)	37/37 (100.0)
18	32/32 (100.0)	40/63 (63.5)	32/55 (58.2)	40/40 (100.0)
16	31/32 (96.9)	44/63 (69.8)	31/50 (62.0)	44/45 (97.8)
14	30/32 (93.8)	50/63 (79.4)	30/43 (69.8)	50/52 (96.2)
12	29/32 (90.6)	54/63 (85.7)	29/38 (76.3)	54/57 (94.7)
10	26/32 (81.3)	59/63 (93.6)	26/30 (86.7)	59/65 (90.8)
8	24/32 (75.0)	61/63 (96.8)	24/26 (92.3)	61/69 (88.4)
6	19/32 (59.4)	62/63 (98.4)	19/20 (95.0)	62/75 (82.7)
4	9/32 (28.1)	62/63 (98.4)	9/10 (90.0)	62/85 (72.9)

PPV, positive predictive value; NPV, negative predictive value.