| Variables | Contact sputum sample | Morning sputum sample | ||||
| Control n (%) | Case n (%) | p | Control n (%) | Case n (%) | p | |
| Aspect |
|
| <0.0001 |
|
| <0.0001 |
| Salivary | 34 (34.0) | 9 (9.0) |
| 34 (34.0) | 9 (9.0) |
|
| Mucopurulent | 66 (66.0) | 91 (91.0) |
| 66 (66.0) | 91 (91.0) |
|
| Volume |
|
| <0.0001 |
|
| <0.0001 |
| <3 ml | 79 (79.0) | 46 (46.0) |
| 79 (79.0) | 46 (46.0) |
|
| ≥3 ml | 21 (21.0) | 54 (54.0) |
| 21 (21.0) | 54 (54.0) |
|