24 h | 48 h | 72 h | χ2 | P | ||||
---|---|---|---|---|---|---|---|---|
Erythema ≥5 mm | Erythema<5 mm | Erythema ≥5 mm | Erythema<5 mm | Erythema ≥5 mm | Erythema<5 mm | |||
In TB patients | ||||||||
Induration ≥5 mm | 530 | 6 | 623 | 3 | 618 | 2 | ||
Induration<5 mm | 104 | 103 | 52 | 65 | 56 | 64 | ||
CR+ | 83.60%a | 92.30% | 91.69% | 31.99 | <0.01 | |||
CR− | 94.50% | 95.59% | 96.97% | 0.59 | 0.75 | |||
Consistency | 85.20%a | 92.60% | 92.16% | 18.36 | <0.01 | |||
Kappa(95%CI) | 0.57 (0.50,0.64) | 0.66(0.58,0.74) | 0.65(0.57,0.73) | |||||
In bacteriologically positive TB patients | ||||||||
Induration ≥5 mm | 300 | 3 | 340 | 1 | 331 | 1 | ||
Induration<5 mm | 51 | 40 | 29 | 24 | 37 | 25 | ||
CR+ | 85.47%a | 92.14% | 89.95% | 8.62 | 0.01 | |||
CR− | 93.02% | 96.00% | 96.15% | 0.43 | 0.81 | |||
Consistency | 86.29%a | 92.39% | 90.36% | 8.19 | 0.02 | |||
Kappa(95%CI) | 0.53 (0.64, 0.42) | 0.58 (0.71, 0.45) | 0.52 (0.65, 0.39) | |||||
In bacteriologically negative TB patients | ||||||||
Induration ≥5 mm | 184 | 4 | 226 | 1 | 231 | 0 | ||
Induration<5 mm | 43 | 51 | 18 | 37 | 13 | 35 | ||
CR+ | 81.06%a | 92.62% | 94.67% | 27.02 | <0.01 | |||
CR− | 92.73% | 97.37% | 100.00% | 3.25 | 0.20 | |||
Consistency | 83.33%a | 93.26% | 95.34% | 27.27 | <0.01 | |||
Kappa(95%CI) | 0.58 (0.68, 0.48) | 0.76 (0.86, 0.66) | 0.82 (0.92, 0.72) | |||||
In extrapulmonary TB patients | ||||||||
Induration ≥5 mm | 45 | 1 | 58 | 0 | 57 | 0 | ||
Induration<5 mm | 11 | 10 | 4 | 5 | 5 | 5 | ||
CR+ | 80.36%a | 93.55% | 91.94% | 6.07 | 0.05 | |||
CR− | 90.91% | 100.00% | 100.00% | 0.96 | 0.62 | |||
Consistency | 82.09%a | 94.03 | 92.54% | 6.06 | 0.05 | |||
Kappa(95%CI) | 0.52 (0.30, 0.74) | 0.68 (0.40, 0.97) | 0.63 (0.34, 0.92) | |||||
In healthy volunteers | ||||||||
Induration ≥5 mm | 35 | 3 | 131 | 3 | – | – | ||
Induration<5 mm | 35 | 1441 | 23 | 1357 | – | – | ||
CR+ | 50.00%a | 85.06% | – | – | 30.84 | <0.01 | ||
CR− | 99.79% | 99.78% | – | – | 0.01 | 0.94 | ||
Consistency | 97.49% | 98.28% | – | – | 2.30 | 0.13 | ||
Kappa(95%CI) | 0.64(0.53,0.75) | 0.90(0.86,0.94) | – | – |