Table 1.
Statistics of the sampled outbreak populations: numbers of infected patients and staff sampled for norovirus shedding, by symptoms, and their ages (mean age in years and 95% range), and collected numbers of samples (no. of observations) per individual
| Out-break | Symptomatic | Asymptomatic | No consent* | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Age (years) | No. observations | Age (years) | No. observations | ||||||
| Setting | N | mean (95% range) | mean (95% range) | N | mean (95% range) | mean (95% range) | N | ||
| 1 | H | Patients | 5† | 62·2 (50·6–73·6) | 3·0 (1–4) | 2 | 64·6 (55·8–73·3) | 3·5 (3–4) | 0 |
| Staff | 11† | 34·8 (20·9–54·9) | 2·3 (2–3) | 4 | 31·1 (23·3–46·9) | 2·0 (1–3) | 4 | ||
| 2 | NH | Residents | 8 | 85·9 (76·0–92·4) | 2·9 (2–4) | 2 | 93·7 (93·2–94·2) | 2·0 (2–2) | 4 |
| Staff | 11 | 40·0 (18·2–59·6) | 2·1 (1–3) | 3 | 36·9 (18·9–53·2) | 2·0 (2–2) | 7 | ||
| 3 | NH | Residents | 8 | 80·5 (71·3–93·1) | 2·6 (2–4) | 8 | 79·9 (58·9–91·5) | 1·6 (1–3) | 2 |
| Staff | 9 | 43·8 (23·4–54·9) | 2·2 (1–3) | 3 | 25·4 (19·0–33·5) | 2·0 (1–3) | 5 | ||
| 4 | NH | Residents | 11 | 88·0 (81·4–93·6) | 2·1 (1–3) | 3 | 85·1 (83·3–86·9) | 1·7 (1–2) | 0 |
| Staff | 7 | 52·1 (47·6–61·3) | 1·6 (1–2) | 6 | 42·7 (31·4–49·7) | 2·0 (2–2) | 1 | ||
H, Hospital; NH, nursing home.
*
Non-compliant, symptomatic subjects who were approached for inclusion but did not give consent.
†
The total number of subjects add up to 124 and not 125. In outbreak 1 there was one symptomatic case for whom status (patient or staff) was missing.