Table 1 Efficacy and Kappa values of diagnostic yield of different diagnostic methods used in the diagnosis of TBLN
Diagnostics Methods | Culture | Sensitivity (%) | Specificity (%) | Kappa (95% CI) | ||
|---|---|---|---|---|---|---|
Positive n (%) | Negative n (%) | |||||
Direct ZN staining | Positive (n = 39) | 32 (82.1) | 7 (17.9) | 43.2 | 87.9 | 0.32 (0.21–0.41) |
Negative (n = 93) | 42 (45.2) | 51 (54.8) | ||||
Concentrated ZN staining | Positive (n = 86) | 70 (81.4) | 16 (18.6) | 94.5 | 72.4 | 0.62 (0.57–0.81) |
Negative (n = 46) | 4 (8.7) | 42 (89.3) | ||||
Direct PCR | Positive (n = 91) | 69 (75.8) | 22 (24.2) | 93.2 | 62.1 | 0.58 (0.41–0.71) |
Negative (n = 41) | 5 (12.2) | 36 (87.8) | ||||
Cytology | Positive (n = 110) | 71 (64.5) | 39 (35.5) | 95.4 | 32.8 | 0.26 (0.22–0.046) |
Negative (n = 22) | 3 (13.6) | 19 (86.4) | ||||