Table 1. Proportion of invalid LPA results in comparison to culture results.
| LJ Positive | LJ No Growth | LJ Contaminated | Total | |
| Valid LPA | 248 | 41 | 12 | 301 (94%) |
| Invalid LPA | 8 | 10 | 1 | 19 (5.9%) |
| Total | 256 (80%) | 51 (16%) | 13 (4%) | 320 |
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