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. 2017 Dec 28;50(6):1701354. doi: 10.1183/13993003.01354-2017

TABLE 4.

Overview of phenotypically susceptible isolates with high (Hi), moderate (Mo) or minimal (Mi) confidence corrected interpretative best confidence values (iBCVs)

Drug Drug-resistant phenotype Hi confidence iBCVs Hi+Mo confidence iBCVs Hi+Mo+Mi confidence iBCVs
False-susceptible Resistance missed % (95% CI) Difference in sensitivity % False-susceptible Resistance missed % (95% CI) Difference in sensitivity % False-susceptible Resistance missed % (95% CI) Difference in sensitivity %
Rifampicin (R) 8294 55 0.7 (0.5–0.9) 0.1 124 1.5 (1.2–1.8) 0.2 192 2.3 (2.0–2.6) 0.2
Isoniazid (H) 11001 55 0.5 (0.4–0.7) 0.2 81 0.7 (0.6–0.9) 0.2 81 0.7 (0.6–0.9) 0.2
Moxifloxacin (MFX) 517 50 8.8 (6.6–11.5) 1.0 50 8.8 (6.6–11.5) 1.0 50 8.8 (6.6–11.5) 1.0
Ofloxacin (OFX)
/levofloxacin (LFX)
3809 93 2.4 (1.9–2.9) 0.5 94 2.4 (2.0–2.9) 0.5 94 2.4 (2.0–3.0) 0.5
Amikacin (AM) 809 6 0.7 (0.3–1.6) 0.2 6 0.7 (0.3–1.6) 0.2 6 0.7 (0.3–1.6) 0.2
Kanamycin (KM) 943 25 2.6 (1.7–3.8) 0.8 25 2.6 (1.7–3.8) 0.8 25 2.6 (1.7–3.8) 0.8
Capreomycin (CM) 810 109 11.9 (9.8–14.1) 3.9 109 11.9 (9.8–14.1) 3.9 109 11.9 (9.8–14.1) 3.9
Streptomycin (S) 2204 16 0.7 (0.4–1.2) 0.3 16 0.7 (0.4–1.2) 0.3 16 0.7 (0.4–1.2) 0.3
Ethionamide and prothionamide (ETO/PTO) 298 0 0.0 (0.0–1.2) 0.0 7 2.3 (0.9–4.7) 1.2 7 2.3 (0.9–4.7) 1.2
Pyrazinamide (Z) 2595 59 2.2 (1.7–2.9) 0.8 67 2.5 (2.0–3.2) 0.9 83 3.1 (2.5–3.8) 1.0

The resistance missed corresponds to the false-susceptible isolates divided by the “corrected phenotype”, consisting of the sum of phenotypically resistant isolates and false-susceptible isolates (the probable smallest and largest figures in each category are shown in bold). The difference in sensitivity was calculated by subtracting the sensitivity for the “observed phenotype” from the sensitivity of the “corrected phenotype” (both sensitivities are plotted in figure 2a).