Probability Variable | Incremental cost per Active TB case prevented (British Pounds; £'s) | ||||
---|---|---|---|---|---|
 | TST | T-SPOT. TB | QFT-GIT | TST/T-SPOT. TB | TST/QFT-GIT |
Base-case estimates | £47,8405# | £39,7123 | £42,0514 | £37,2061 | £37,6992 |
Prevalence | Â | Â | Â | Â | Â |
0.1 | £109,1205 | £69,4623 | £80,1604 | £55,1181 | £58,3212 |
0.4 | £40,1805 | £35,9943 | £37,2874 | £34,9671 | £35,1222 |
T-SPOT. TB sensitivity | Â | Â | Â | Â | Â |
0.83 | £47,8405 | £41,8633 | £42,0514 | £38,9942 | £37,6991 |
0.97 | £47,8405 | £39,4063 | £42,0514 | £36,9511 | £37,6992 |
T-SPOT. TB specificity | Â | Â | Â | Â | Â |
0.92 | £47,8405 | £46,0904 | £42,0513 | £38,7072 | £37,6991 |
0.99 | £47,8405 | £40,5103 | £42,0514 | £37,3941 | £37,6992 |
QFT-GIT sensitivity | Â | Â | Â | Â | Â |
0.85 | £47,8405 | £39,7123 | £42,8624 | £37,2061 | £38,3052 |
0.95 | £47,8405 | £39,7123 | £40,9624 | £37,2062 | £36,8871 |
QFT-GIT specificity | Â | Â | Â | Â | Â |
0.9 | £47,8405 | £39,7123 | £46,3024 | £37,2061 | £38,7012 |
0.97 | £47,8405 | £39,7123 | £40,3504 | £37,2061 | £37,2992 |
TST sensitivity | Â | Â | Â | Â | Â |
0.69 | £53,1745 | £39,7122 | £42,0514 | £39,0391 | £39,7783 |
0.95 | £45,4195 | £39,7123 | £42,0514 | £36,3741 | £36,7562 |
TST specificity | Â | Â | Â | Â | Â |
0.65 | £61,2055 | £39,7122 | £42,0514 | £39,0441 | £40,0553 |
0.9 | £38,9313 | £39,7124 | £42,0515 | £35,9811 | £36,1292 |
Starting LTBI treatment | Â | Â | Â | Â | Â |
0.55 | £50,1965 | £46,4743 | £47,9514 | £42,8281 | £43,0912 |
0.95 | £47,0225 | £37,3643 | £40,0014 | £35,2531 | £35,8272 |
Severe INH hepatitis | Â | Â | Â | Â | Â |
0.001 | £47,6535 | £39,5763 | £41,9234 | £37,0731 | £37,5632 |
0.023 | £49,7435 | £41,1003 | £43,3414 | £38,5591 | £39,0822 |
Efficacy of 6 months INH treatment | Â | Â | Â | Â | Â |
0.5 | £64,4575 | £53,8943 | £56,9184 | £50,6371 | £51,2782 |
0.93 | £31,1545 | £25,4723 | £27,1144 | £23,7191 | £24,0642 |
TST return rate | Â | Â | Â | Â | Â |
0.95 | £47,6805 | £39,7123 | £42,0514 | £37,0371 | £37,5192 |
0.65 | £49,0125 | £39,7123 | £42,0514 | £38,4391 | £39,0162 |
Post exposure TB | Â | Â | Â | Â | Â |
0.01 | £52,4125 | £44,2843 | £46,6194 | £41,7781 | £42,2712 |
0.05 | £40,2215 | £32,0933 | £34,4374 | £29,5861 | £30,0802 |