TABLE 2.
Performance of direct culture and decontaminated culture
| Culture type | Median no. of days to positive (P = 0.8) | % of agreement with MDRTB test resultsa (P < 0.001) | % Sensitivity of:
|
% Sensitivity (no. positive/total no.) of the most concentrated culture well if:
|
||
|---|---|---|---|---|---|---|
| All cultures (no. positive/total no.), combined dilutions (P < 0.001) | Most sensitive single dilution (P < 0.001) | All contamination excluded (P = 0.4) | Partial contamination included (P < 0.001) | |||
| Conventional decontaminated (n = 715) | 8.0 | 97 | 97 (331/340) | 93 (undiluted) | 98 (158/162) | 97 (180/185) |
| Direct (n = 715) | 8.0 | 97 | 81 (276/340) | 70 (1:400) | 96 (155/162) | 84 (156/185) |
a
For each culture type, Kappa is 0.84.