TST 5 mm | TST 10 mm | TST 11 mm | |
Health workers | n = 42 | n = 42 | n = 42 |
QFT−/TST− | 6 (14.28) | 8 (19.04) | 15 (35.71) |
QFT+/TST+ | 20 (47.61) | 20 (47.61) | 13 (30.95) |
QFT−/TST+ | 15 (35.71) | 13 (30.95) | 6 (14.28) |
QFT+/TST− | 1 (2.38) | 1(2.38) | 8 (19.04) |
All discordant (%) | 16 (38.10) | 14 (33.33) | 14 (33.33) |
Concordance, % | 61.90 | 66.67 | 66.67 |
Kappa | 0.29 | 0.33 | 0.33 |
Fisher, p-value | 0.0192 | 0.0042 | 0.0150 |
Slaughterhouse workers | n = 31 | n = 31 | n = 31 |
QFT−/TST− | 0 (0.00) | 1 (3.23) | 1 (3.23) |
QFT+/TST+ | 30 (96.77) | 30 (96.77) | 30 (96.77) |
QFT−/TST+ | 1 (3.23) | 0 (0.0) | 0 (0.00) |
QFT+/TST− | 0 (0.00) | 0 (0.00) | 0 (0.00) |
All discordant (%) | 1 (3.23) | 0 (0.00) | 0 (0.00) |
Concordance, % | 96.77 | 100.00 | 100.00 |
kappa, | 0.98 | 1.00 | 1.00 |
Fisher, p-value | 0.03 | <0.001 | <0.001 |
Household contact of TB index cases | n = 28 | n = 28 | n = 28 |
QFT−/TST− | 5 (17.85) | 7 (25.00) | 8 (28.57) |
QFT+/TST+ | 14 (50.0) | 14 (50.0) | 14 (50.0) |
QFT−/TST+ | 6 (21.42) | 4 (14.28) | 3 (10.71) |
QFT+/TST− | 3 (10.71) | 3 (10.71) | 3 (10.71) |
All discordant (%) | 9 (32.14) | 7 (25.00) | 6 (21.43) |
Concordance, % | 67.86 | 75.00 | 78.57 |
kappa | 0.29 | 0.47 | 0.55 |
Fisher, p-value | 0.056 | 0.0066 | 0.0018 |