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. 2013 Jul 25;2013:175271. doi: 10.1155/2013/175271

Table 9.

Evaluation results for distinguishing between Grade 1 and Grade 2 to each feature set.

Object Feature set TN FP FN TP SN (%) SP (%) PPV (%) NPV (%) ACC (%)
NEN CNF 19.60 11.70 12.40 20.30 61.25 63.44 64.35 63.29 62.34
(6.26) (4.97) (6.26) (4.97) (19.56) (15.52) (8.93) (9.49) (7.78)

CLF 22.40 17.30 9.60 14.70 70.00 45.94 58.39 66.13 57.97
(5.99) (6.95) (5.99) (6.95) (18.70) (21.70) (10.63) (16.21) (5.23)
Lumen PLF 23.80 6.50 8.20 25.50 74.38 79.69 79.65 75.40 77.03
(1.32) (3.95) (1.32) (3.95) (4.11) (12.35) (10.15) (4.96) (6.83)
ALF 25.20 13.40 6.80 18.60 78.75 58.13 67.05 73.46 68.44
(2.90) (6.31) (2.90) (6.31) (9.06) (19.72) (9.88) (5.85) (7.39)

CEF 18.60 14.50 13.40 17.50 58.13 54.69 56.45 57.03 56.41
(4.30) (4.14) (4.30) (4.14) (13.44) (12.95) (7.17) (9.10) (7.53)
EN PEF 22.20 8.90 9.80 23.10 69.38 72.19 71.89 70.04 70.78
(1.14) (2.92) (1.14) (2.92) (3.55) (9.14) (6.94) (4.08) (5.26)
AEF 22.40 11.60 9.60 20.40 70.00 63.75 65.95 68.16 66.88
(2.32) (2.27) (2.32) (2.27) (7.25) (7.10) (5.42) (5.84) (5.50)

CDF 22.40 17.30 9.60 14.70 70.00 45.94 58.39 66.13 57.97
(5.99) (6.95) (5.99) (6.95) (18.70) (21.70) (10.63) (16.21) (5.23)
Duct PDF 23.80 6.50 8.20 25.50 74.38 79.69 79.65 75.40 77.03
(1.32) (3.95) (1.32) (3.95) (4.11) (12.35) (10.15) (4.96) (6.83)
ADF 25.10 13.20 6.90 18.80 78.44 58.75 67.25 73.40 68.60
(2.88) (6.21) (2.88) (6.21) (9.02) (19.42) (9.75) (5.88) (7.31)

CTF 22.40 17.30 9.60 14.70 70.00 45.94 58.39 66.13 57.97
(5.99) (6.95) (5.99) (6.95) (18.70) (21.70) (10.63) (16.21) (5.23)
Tissue PTF 23.80 6.50 8.20 25.50 74.38 79.69 79.65 75.40 77.03
(1.32) (3.95) (1.32) (3.95) (4.11) (12.35) (10.15) (4.96) (6.83)
ATF 25.10 13.20 6.90 18.80 78.44 58.75 67.25 73.40 68.60
(2.88) (6.21) (2.88) (6.21) (9.02) (19.42) (9.75) (5.88) (7.31)

TP (true positive): the number of Grade 2s that are correctly classified as Grade 2s.

FP (false positive): the number of Grade 1s that are incorrectly classified as Grade 2s.

FN (false negative): the number of Grade 2s that are incorrectly classified as Grade 1s.

TN (true negative): the number of Grade 1s that are correctly classified as Grade 1s.