TABLE 1.
Performance of the LE and NIT urinalysis tests in screening for significant bacteriuriaa
| Screening test(s) | Sensitivity (%) at colony counts of:
|
Specificity (%) at colony count of:
|
Predictive value (%) at colony counts of:
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Positive predictive value
|
Negative predictive value
|
|||||||||||
| 103 | 104 | 105 | 103 | 104 | 105 | 103 | 104 | 105 | 103 | 104 | 105 | |
| LE | 71.4 | 76.9 | 84.4 | 59.4 | 59.4 | 59.4 | 3.1 | 16.0 | 19.4 | 99.1 | 96.3 | 97.1 |
| NIT | 0 | 7.9 | 43.6 | 96.6 | 96.6 | 96.6 | 0 | 27.3 | 75.0 | 99.1 | 86.8 | 88.2 |
| LE and NIT | 0 | 25 | 84 | 98.3 | 98.3 | 98.3 | 0 | 42.9 | 84 | 99.1 | 96.3 | 98.3 |
a
Colony counts for significant bacteriuria are expressed in CFU of one or two bacteria defined as uropathogens (see Materials and Methods) per milliliter.