Table 3.
Comparative results of the numbers of spots and composition in three groups
| Spot types | LTBI | Active TB infection | Old TB infection | χ2/P | Z/P |
|---|---|---|---|---|---|
| ESAT-6 unique positive | |||||
| Cases | 1281 | 270 | 69 | ||
| Composition rate | 27.78 | 14.88 | 20.66 | 120.844/< 0.001 | |
| Median spot number | 12.00 | 20.00 | 16.00 | 57.080/< 0.001 | |
| Spot number interquartile range | 8.00,23.00 | 12.00,36.25 | 8.50,26.50 | ||
| CFP-10 unique positive | |||||
| Cases | 741 | 108 | 42 | ||
| Composition rate | 16.07 | 5.96 | 12.57 | 116.473/< 0.001 | |
| Median spot number | 11.00 | 17.00 | 19.50 | 19.355/< 0.001 | |
| Spot number interquartile range | 7.00,20.00 | 9.00,31.75 | 7.00,32.25 | ||
| ESAT-6 and CFP-10 double positive | |||||
| Cases | 2590 | 1436 | 223 | ||
| Composition rate | 56.15 | 79.16 | 66.77 | 297.397/< 0.001 | |
| ESAT-6/median spot number | 24.00 | 44.00 | 29.00 | 320.640/< 0.001 | |
| ESAT-6/ Spot number interquartile range | 12.00,46.00 | 24.00,80.00 | 14.00,60.00 | ||
| CFP-10/ median spot number | 24.00 | 46.00 | 26.00 | 320.728/< 0.001 | |
| CFP-10 (Spot number interquartile range) | 12.00,47.00 | 23.00,89.00 | 15.00,54.00 | ||
| Total spot number | |||||
| Cases | 4612 | 1814 | 334 | ||
| Composition rate | 100.00 | 100.00 | 100.00 | ||
| ESAT-6/ median spot number | 15.00 | 36.00 | 20.00 | 635.730/< 0.001 | |
| ESAT-6/(Spot number Interquartile range) | 7.00,33.00 | 17.00,70.00 | 9.00,43.00 | ||
| CFP-10/median spot number | 12.00 | 35.00 | 19.00 | 535.277/< 0.001 | |
| CFP-10 (Spot number interquartile range) | 4.00,30.00 | 11.00,75.00 | 6.00,40.25 | ||
TB: tuberculosis; LTBI: latent TB infection