Figure 1:Flowchart showing screening sequences: Among women with macroscopic normal cervices, 34 cases of VIA negative were positive at VILI. Biopsies revealed 31 dysplasia and 3 normal results
Anomaly |
Number |
% |
Chronic cervicitis |
11 |
68.8 |
Epidermoid papilloma |
3 |
18.8 |
Glandular hyperplasia |
1 |
6.2 |
Malpighian acanthosis |
1 |
6.2 |
Total |
16 |
100 |
Table 1:Cervical non-dysplastic abnormalities
|
Cervical dysplasia on biopsy specimen |
|||
Present |
Absent |
Total |
||
VIA |
Positive |
33 (a) |
11 (b) |
44 (a+b) |
Negative |
41 (c) |
12 (d) |
53 (c+d) |
|
Total |
74 (a+c) |
23 (b+d) |
97 (a+b+c+d) |
Table 2:Accuracy of VIA in diagnosing cervical dysplasia
Sensitivity (SS): a/a+c=33/74 = 44.6%
Specificity (SP): d/b+d=12/23 = 52.2%
Positive predictive value: a/a+b =33/44 =75%
Negative predictive value: d/c+d =12/53 =22.6%
Likehood ratio for a positive test: SS/1-SP= 0.93
Likehood ratio for a negative test: 1-SS/SP= 1.06
|
Cervical dysplasia on biopsy specimen |
|||
Present |
Absent |
Total |
||
VILI |
Positive |
67 (a) |
20 (b) |
87 (a+b) |
Negative |
07 (c) |
03 (d) |
10 (c+d) |
|
Total |
74 (a+c) |
23 (b+d) |
97 (a+b+c+d) |
Table 3:Accuracy of VILI in diagnosing cervical dysplasia
Sensitivity (SS): a/a+c= 67/74= 90.5%
Specificity (SP): d/b+d=3/23 = 13.0%
Positive predictive value: a/a+b = 67/87=77.0%
Negative predictive value: d/c+d = 03/10=30%
Likehood ratio for a positive test: SS/1-SP= 1.04
Likehood ratio for a negative test: 1-SS/SP=0.73
|
Cervical dysplasia on biopsy specimen |
|||
Present |
Absent |
Total |
||
VIA-VILI |
At least one positive |
70 (a) |
20 (b) |
90 (a+b) |
Both negative |
04 (c) |
03 (d) |
07 (c+d) |
|
Total |
74 (a+c) |
23 (b+d) |
97 (a+b+c+d) |
Table 4:Accuracy of both methods in diagnosing cervical dysplasia
Sensitivity (SS): a/a+c= 70/74= 94.6%
Specificity (SP): d/b+d=3/23 = 13.04%
Positive predictive value: a/a+b = 70/90=77.8%
Negative predictive value: d/c+d = 3/7=42.9%
Likehood ratio for a positive test: SS/1-SP=1.08
Likehood ratio for a negative test: 1-SS/SP=0.41
Figure 1:Flowchart showing screening sequences: Among women with macroscopic normal cervices, 34 cases of VIA negative were positive at VILI. Biopsies revealed 31 dysplasia and 3 normal results
Tables at a glance
Figures at a glance