Table 4.
Paired Bartonella Test Results
| All participants | Kappa | |
|---|---|---|
| IFA test/retest | n = 24 | 0.71 |
| Positive/positive | 15 | |
| Positive/negative | 3 | |
| Negative/positive | 0 | |
| Negative/negative | 6 | |
| ddPCR test/retest | n = 23 | −0.01 |
| Positive/positive | 1 | |
| Positive/negative | 5 | |
| Negative/positive | 3 | |
| Negative/negative | 14 | |
| ddPCR/IFA | n = 30 | −0.31 |
| Positive/positive | 7 | |
| Positive/negative | 5 | |
| Negative/positive | 17 | |
| Negative/negative | 1 |
Agreement between paired samples from all participants (drawn between 2 and 8 days apart) for IFA and ddPCR, and agreement between IFA and ddPCR for each participant. Cohen's kappa score indicates agreement between tests.
ddPCR, droplet digital PCR; IFA, indirect fluorescent antibody.