Table 3

Sensitivity, specificity, and positive and negative predictive values for PET-positivity at consecutive cut-off points of the prediction rule score
Prediction rule cut-off point* Sensitivity (%)** Specificity (%)** Positive predictive value (%)** Negative predictive value (%)** Patients referred for PET (%)***
0 100 (77/77) 0 (0/18) 81 (77/95) - 0 (/95)
1 94.8 (73/77) 27.8 (5/18) 84.8 (73/86) 55.5 (5/9) 9.5 (9/95)
2 93.5 (72/77) 33.3 (6/18) 85.7 (72/84) 54.5 (6/11) 11.6 (11/95)
3 90.9 (70/77) 38.9 (7/18) 86.4 (70/81) 50.0 (7/14) 14.7 (14/95)
4 85.7 (66/77) 55.6 (10/18) 89.2 (66/74) 47.6 (10/21) 22.1 (21/95)
5 81.8 (63/77) 55.6 (10/18) 88.7 (63/71) 41.7 (10/24) 25.3 (24/95)
6 79.2 (61/77) 66.7 (12/18) 91.0 (61/76) 42.9 (12/28) 29.5 (28/95)
7 77.9 (60/77) 72.2 (13/18) 92.3 (60/65) 43.3 (13/30) 31.6 (30/95)
8 76.6 (59/77) 72.2 (13/18) 92.2 (59/64) 41.9 (13/31) 32.6 (31/95)
9 72.7 (56/77) 83.3 (15/18) 94.9 (56/59) 41.7 (15/36) 37.9 (36/95)
10 64.9 (50/77) 94.4 (17/18) 98.0 (50/51) 38.6 (17/44) 46.3 (44/95)
11 53.2 (41/77) 94.4 (17/18) 97.6 (41/42) 32.0 (17/53) 55.8 (53/95)
12 48.1 (37/77) 94.4 (17/18) 97.4 (37/38) 29.8 (17/57) 60.0 (57/95)
13 41.6 (32/77) 94.4 (17/18) 97.0 (32/33) 27.4 (17/62) 65.3 (62/95)
14 35.1 (27/77) 94.4 (17/18) 96.4 (27/28) 25.4 (17/67) 70.5 (67/95)
15 27.3 (21/77) 100 (18/18) 100 (21/21) 24.3 (18/74) 77.9 (74/95)
16 24.6 (19/77) 100 (18/18) 100 (19/19) 23.7 (18/76) 80.0 (76/95)
17 20.8 (16/77) 100 (18/18) 100 (16/16) 22.8 (18/79) 83.2 (79/95)
18 13.0 (10/77) 100 (18/18) 100 (10/10) 21.2 (18/85) 89.5 (85/95)
19 7.8 (6/77) 100 (18/18) 100 (6/6) 20.2 (18/89) 93.7 (89/95)
20 7.8 (6/77) 100 (18/18) 100 (6/6) 20.2 (18/89) 93.7 (89/95)
21 3.9 (3/77) 100 (18/18) 100 (3/3) 19.6 (18/92) 96.8 (92/95)

*Patients were considered test-positive if the prediction rule score was at or above this level.

**Data in parentheses represent proportions.

***Number of patients that would have been indicated for referral to PET if the prediction rule score was at or above the corresponding level.

Mostard et al.

Mostard et al. BMC Pulmonary Medicine 2012 12:57   doi:10.1186/1471-2466-12-57

Open Data