Table 1 Matched univariate analysis (matched "Mantel-Haenszel" odds ratio: mOR) and multivariate conditional logistic regression analysis (adjusted odds ratio: aOR). Cases of Norovirus infection (n = 41) and Controls (n = 41) according to investigated risk factors
From: Epidemiological and virological investigation of a Norovirus outbreak in a resort in Puglia, Italy
| Â | Â | Â | Univariate analysis | Multivariate analysis | ||||
|---|---|---|---|---|---|---|---|---|
Risk factors(*) | Cases (%) | Controls (%) | mOR | 95% CI | p-value | aOR | 95% CI | p-value |
Ice | 21/41 (51) | 12/41 (29) | 4.1 | (0.9–7.1) | 0.04 | 16.4 | (1.8–250.9) | 0.04 |
Eggs | 2/41 (5) | 8/41 (19) | 2.3 | (0.1–1.7) | 0.12 | - | - | - |
Grilled sausage | 21/41 (51) | 25/41 (61) | 0.7 | (0.2–1.7) | 0.17 | - | - | - |
Ham | 1/41 (2) | 5/41 (12) | 2.8 | (0.1–1.7) | 0.09 | - | - | - |
Grilled meat | 11/41 (27) | 15/41 (37) | 3.5 | (0.1–1.1) | 0.06 | - | - | - |
Snacks | 20/41 (49) | 19/41 (46) | 0.1 | (0.4–2.8) | 0.15 | - | - | - |
Raw mussels | 22/41 (54) | 13/41 (31) | 3.9 | (0.9–6.8) | 0.04 | 25.5 | (1.5 – 442.9) | 0.03 |