Table 3.
Sensitivity, specificity, positive predictive value, and negative predictive value of Whatman FTA cards compared with paired plasma specimen for HIV-1 viral load testing at a 1000 copies ml−1 medical decision point
|
FTA cards (copies ml−1) |
Plasma (copies ml−1) |
Total |
Se, Sp, PPV and NPV |
||
|---|---|---|---|---|---|
|
≤1000 |
≥1000 |
||||
|
Roche |
≤1000 |
22 |
0 |
22 |
Se=78.6%; Sp=100.0 %, PPV=100.0%; NPV=92.2 % |
|
≥1000 |
6 |
71 |
77 |
||
|
Total |
28 |
71 |
99 |
||
|
|
|
|
|||
|
Abbott |
≤1000 |
24 |
3 |
27 |
Se=92.3%; Sp=95.9%; PPV=88.9%; NPV=97.2 % |
|
≥1000 |
2 |
70 |
72 |
||
|
Total |
26 |
73 |
99 |
||
Se, sensitivity; Sp, specificity; PPV, positive predictive value; NPV, negative predictive value.