Table 2.
Case–Control Analysis of Patients With or Without Air Dispersal of Respiratory Viruses During Respiratory Tract Infection
| Variable | Patients With Air Dispersal of Respiratory Viruses (n = 7), No. (%) a | Patients Without Air Dispersal of Respiratory Viruses (n = 13), No. (%) a | P Value |
|---|---|---|---|
| Age, mean mo ± SD | 21±14 | 48±57 | .312 |
| Sex, male | 4 (57.1) | 5 (38.5) | .642 |
| Respiratory viruses | |||
| Parainfluenza virus 3 | 4 (57.1) | 6 (46.2) | 1 |
| Respiratory syncytial virus | 2 (28.6) | 1 (7.7) | .270 |
| Rhinovirus | 0 | 5 (38.5) | .114 |
| Adenovirus | 1 (14.3) | 1 (7.7) | .158 |
| Symptoms | |||
| Fever | 6 (85.7) | 5 (38.5) | .070 |
| Cough | 5 (71.4) | 4 (30.8) | .160 |
| Running nose | 2 (28.6) | 4 (30.8) | 1 |
| SOB | 3 (42.9) | 2 (15.4) | .290 |
| Viral load of NPA | |||
| Mean copy/mL | 6.15×107 | 1.61×105 | <.001 |
| ≥5 log10 b | 7 (100) | 5 (38.5) | .015 |
| Day of air sampling after NPA collection (mean ± SD) c | 2.57±1.68 | 2.23 ± 1.93 | .713 |
| Use of medication | |||
| Salbutamol | 3 (42.9) | 3 (23.1) | .613 |
| Corticosteroid (inhaled or oral) | 2 (28.6) | 2 (15.4) | .587 |
Note. NPA, nasopharyngeal aspirates; SD, standard deviation; SOB, shortness of breath.
a
Units unless otherwise indicated.
b
Viral load of NPA ≥ 5 log10 indicates high viral load in the clinical specimens.
c
Each patient had one air sample collection during hospitalization.