Table 4.
Comparison of the high and low contagious groups
| Overall prevalence |
Prevalence in high contagious group (AFB+) |
Prevalence in lowly contagious group (AFB-) |
p | |
|---|---|---|---|---|
| History, signs, symptoms | ||||
| Weight loss | 36% | 48% | 24% | 0.000*** |
| Cough | 45% | 58% | 31% | 0.000*** |
| Haemoptysis | 11% | 17% | 4% | 0.001** |
| Previous TB | 27% | 19% | 37% | 0.001** |
| German residency | 24% | 64% | 36% | 0.028* |
| Passive case finding | 65% | 58% | 42% | n. s. |
| Active case finding | 35% | 37% | 64% | 0.000*** |
| Auscultation | 23% | 28% | 18% | 0.035* |
| No history and findings | 34% | 20% | 50% | 0.000*** |
| Radiological findings | ||||
| CXR | ||||
| - Infiltrate | 85% | 83% | 87% | 0.394 |
| - Cavitation | 27% | 36% | 18% | 0.001*** |
| - Miliary picture | 2% | 2% | 2% | 1.000 |
| - Pleural effusion | 11% | 13% | 8% | 0.211 |
| - Others+ | 3% | 3% | 5% | 0.684 |
| CT | ||||
| - Infiltrate | 72% | 70% | 74% | 0.491 |
| - Cavitation | 50% | 62% | 37% | 0.000*** |
| - Miliary picture | 3% | 4% | 2% | 0.501 |
| - Pleural effusion | 13% | 16% | 9% | 0.119 |
| - Tree-in-bud sign | 25% | 32% | 18% | 0.008** |
| - Others+ | 2% | 1% | 3% | 0.168 |
Calculation by univariate analyses for each parameter using Pearson’s Chi-square test except Fisher’s exact test for “Miliary picture in CXR” and “Miliary picture in CT”. Prevalence calcuation after excluding no data-cases
* = significant, ** = very significant, *** = highly significant
+Any pathological finding not mentioned in the list