Table 4 |
|||||
|
Post-test probabilities (predictive values) of dipstick nitrites, leucyte-esterase and combinations of both tests in population sub-groups and different settings, based on pooled sensitivities, pooled specificities and pooled pre-test probabilities (prevalences). |
|||||
|
Post-test probability (predictive value) |
|||||
|
|
|||||
|
Pre-test Probability (prevalence) |
Nitrites |
Leucocyte-esterase |
One or both positive |
Both positive |
|
|
|
|||||
|
Population |
|||||
|
General population |
.15 |
||||
|
- Test + |
.33 |
.27 |
.31 |
.89 |
|
|
- Test - |
.90 |
.91 |
.94 |
.91 |
|
|
Children |
.20 |
||||
|
- Test + |
.61 |
.34 |
.58 |
.66 |
|
|
- Test - |
.88 |
.88 |
.95 |
.87 |
|
|
Pregnant women |
.06 |
||||
|
- Test + |
.55 |
.10 |
.58 |
(.99) |
|
|
- Test - |
.97 |
.97 |
.95 |
(.96) |
|
|
Elderly |
.30 |
||||
|
- Test + |
.88 |
.47 |
.55 |
(.90) |
|
|
- Test - |
.89 |
.81 |
.90 |
(.86) |
|
|
Surgery |
.15 |
||||
|
- Test + |
.70 |
.27 |
.51 |
(.38) |
|
|
- Test - |
.92 |
.91 |
.97 |
(.94) |
|
|
Urology |
.15 |
||||
|
- Test + |
.78 |
.68 |
.54 |
||
|
- Test - |
.93 |
.97 |
.98 |
||
|
Setting |
|||||
|
Family physician |
.55 |
||||
|
- Test + |
.84 |
.62 |
.76 |
||
|
- Test - |
.61 |
.69 |
.84 |
||
|
Outpatient |
.10 |
||||
|
- Test + |
.56 |
.22 |
.32 |
||
|
- Test - |
.94 |
.94 |
.97 |
||
|
Inpatient |
.15 |
||||
|
- Test + |
.41 |
.38 |
.38 |
||
|
- Test - |
.92 |
.93 |
.95 |
||
|
Emergency |
.15 |
||||
|
- Test + |
.62 |
.41 |
.41 |
||
|
- Test - |
.92 |
.92 |
.98 |
||
|
|
|||||
|
(): based on one study only. |
|||||
|
Devillé et al. BMC Urology 2004 4:4 doi:10.1186/1471-2490-4-4 |
|||||
