Table 3 Sensitivity, specificity, and kappa value of sputum culture (n = 167) a
BALF culture n (%) | Sputum culture n (%) | Sensitivity %(95% CI) b | Specificity %(95% CI)b | Kappa value (95% CI) b | |
|---|---|---|---|---|---|
Streptococcus pneumoniae | 21(12.57) | 24(14.37) | 71(48–88) | - | - |
Haemophilus influenzae | 12(7.19) | 11(6.59) | 64(32–88) | - | - |
Moraxella catarrhalis | 7(4.19) | 22(13.17) | 71(30–95) | - | - |
Mixed bacteria | 0 | 4(2.40) | - | - | - |
Others | 14(8.38) | 12(7.19) | - | - | - |
Negative | 113(67.66) | 94(56.29) | - | - | - |
Total | 167(100.00) | 167(100.00) | 64(50–77) | 70(60–78) | 0.450(0.328–0.571) |