Table 3 Varicella cases in children <17 years of age in Munich paediatric practices during five consecutive varicella seasons; absolute numbers and mean number per 1000 patient contacts (with 95% confidence interval)
Season | 1 | 2 | 3 | 4 | 5 | 1-5 |
|---|---|---|---|---|---|---|
Surveillance period | Oct 06-Sep 07 | Oct 07-Sep 08 | Oct 08-Sep 09 | Oct 09-Sep 10 | Oct 10-Sep 11 | Oct 06-Sep 11 |
(N all monthly reports) | (N = 1015) | (N = 965) | (N = 1013) | (N = 974) | (N = 947) | (N = 4914) |
Varicella cases - all | ||||||
- n | 6079 | 3518 | 3215 | 1778 | 1464 | 16054 |
- mean per 1000 patient contacts (95%CI) | 6.58 (6.14-7.03) | 4.20 (3.85-4.55) | 3.95 (3.59-4.30) | 2.26 (2.02-2.51) | 2.16 (1.86-2.47) | 3.86 (3.70-4.02) |
Varicella cases - vaccinated | ||||||
- n | 218 | 231 | 314 | 179 | 134 | 1076 |
- mean per 1000 patient contacts (95%CI) | 0.27 (0.22-0.32) | 0.32 (0.24-0.40) | 0.40 (0.34-0.47) | 0.26 (0.21-0.32) | 0.24 (0.17-0.32) | 0.30 (0.27-0.33) |
- % of all varicella cases | 3.6 | 6.6 | 9.8 | 10.1 | 9.2 | 6.7 |
Varicella cases - with complications | ||||||
- n | 31 | 20 | 38 | 28 | 17 | 134 |
- mean per 1000 patient contacts (95%CI) | 0.04 (0.02-0.06) | 0.03 (0.01-0.05) | 0.07 (0.03-0.11) | 0.07 (0.02-0.11) | 0.05 (0.01-0.08) | 0.05 (0.04-0.07) |
- % of all varicella cases | 0.5 | 0.6 | 1.2 | 1.6 | 1.2 | 0.8 |