Table 3. Positive results of other diagnostic tests of patients with positive and negative urinary antigen testsa.
| Diagnostic test | Positive urinary antigen testb (n=86) | Negative urinary antigen test (n=51) |
|---|---|---|
| Sputum culture | 23 | 3 |
| Fourfold rise in titer/seroconversion | 35 | 27 |
| Polymerase chain reaction | 9 | 1 |
| Single high titer | 5 | 3 |
| Positive urinary antigen ELISAb test in concentrated urinec | NA | 7 |
| No positive test results | 29 | 17 |
aNA, not applicable; ELISA, enzyme-linked immunosorbent assay. bUrinary antigen test results were based on the test result of the qualitative immunochromatographic assay (Binax Now, Binax, Portland, ME). cPositive Binax EIA and Biotest EIA in concentrated urine samples.