Table 1.
Characteristics of Patients and Air Samples (Liquid Cyclone), Including All and Positive Samples
| Patients, n (%) | Patients With NoV-Positive Air Sample, n (%) | P Value | Air Samples, n (%) | NoV-Positive Air Samples, n (%) | P Value | |
|---|---|---|---|---|---|---|
| Total | 26 | 10 (38%) | … | 86 | 21 (24%) | … |
| Age group | ||||||
| <80 | 13 | 3 (23%) | .11a | 40 | 7 (18%) | .16a |
| ≥80 | 13 | 7 (54%) | … | 46 | 14 (30%) | … |
| Sex | ||||||
| Male | 13 | 4 (30%) | .42a | 43 | 8 (19%) | .21a |
| Female | 13 | 6 (46%) | … | 43 | 13 (30%) | … |
| Outbreak | ||||||
| Yes | 15 | 9 (60%) | .01b | 52 | 17 (33%) | .03a |
| No | 11 | 1c (9%) | … | 34 | 4c (12%) | … |
| Norovirus genotype | ||||||
| II | 25 | 10 (40%) | .62b | 82 | 21 (26%) | .24a |
| I | 1 | 0 (0%) | … | 4 | 0 (0%) | … |
| Sampling site | ||||||
| Corridor | 21 | 5 (24%) | .82a | 27 | 5 (19%) | .65a |
| Room | 25 | 7 (28%) | … | 39 | 10 (26%) | … |
| Toilet | 15 | 5 (33%) | … | 20 | 6 (30%) | … |
| Patients/room d | ||||||
| 1 | 15 | 5 (33%) | .61b | 37 | 6 (16%) | .04a |
| 2 | 7 | 4 (57%) | … | 16 | 8 (50%) | … |
| 3–4 | 3 | 1 (33%) | … | 6 | 2 (33%) | … |
Abbreviation: NoV, norovirus.
aChi-square test for differences in positive air samples within categories.
bFischer’s exact test for differences in positive air samples within categories.
cNo outbreak at the time of sampling, but emerged 3 days later.
dTotal number of patients at the room of the norovirus positive patient.