Table 3. Percentage of concordance, point and interval estimates of kappa coefficient according to qPCR and blood culture methods in 44 Chagas disease patients with two blood harvesting.
| Method | 1st sample | 2nd sample | Percentage(Number of patients/total) | Agreement Coefficient |
Type of agreement |
|---|---|---|---|---|---|
| qPCR | Positive | Positive | 31.8 (14/44) | 0.083 [-0.212; 0.379] | Slight |
| Positive | Negative | 9.1 (4/44) | |||
| Negative | Positive | 36.4 (16/44) | |||
| Negative | Negative | 22.7 (10/44) | |||
|
Blood Culture |
Positive | Positive | 22.7 (10/44) | 0.329 [0.034; 0.624] | Fair |
| Positive | Negative | 15.9 (7/44) | |||
| Negative | Positive | 15.9 (7/44) | |||
| Negative | Negative | 45.5 (20/44) |