Volume 28, Number 7—July 2022
Dispatch
Deaths from Tick-Borne Encephalitis, Sweden
Renata Varnaitė, Sara Gredmark-Russ, and Jonas Klingström
Table
Characteristics of TBE cases reported to the Public Health Agency of Sweden during 2004–2017*
| Group | No. (%) | Case-fatality rate, % | Mortality rate in controls, % | No. observed deaths, total, M/F | Expected deaths | SMR (95% CI) | p value |
|---|---|---|---|---|---|---|---|
| Total cases |
2,941 (100) |
0.75 |
0.19 |
22 |
5.55 |
3.96 (2.55–5.9) |
<0.001 |
| Sex | |||||||
| M | 1,777 (60) | 0.56 | 0.21 | 10 | 3.65 | 2.74 (1.39–4.88) | 0.006 |
| F |
1,164 (40) |
1.03 |
0.16 |
12 |
1.90 |
6.32 (3.42–10.74) |
<0.001 |
| Age group | |||||||
| 0–9 | 143 (5) | 0 | 0 | 0 | 0 | NA | NA |
| 10–19 | 212 (7) | 0 | 0 | 0 | 0 | NA | NA |
| 20–29 | 256 (9) | 0 | 0 | 0 | 0 | NA | NA |
| 30–39 | 379 (13) | 0 | 0.01 | 0 | 0.05 | NA | NA |
| 40–49 | 532 (18) | 0.19 | 0.02 | 1, 0/1 | 0.10 | 10.00 (0.5–49.32) | 0.100 |
| 50–59 | 546 (19) | 0.37 | 0.16 | 2, 0/2 | 0.85 | 2.35 (0.39–7.77) | 0.264 |
| 60–69 | 480 (16) | 1.25 | 0.22 | 6, 4/2 | 1.05 | 5.71 (2.32–11.89) | <0.001 |
| 70–79 | 301 (10) | 3.32 | 0.66 | 10, 3/7 | 2.00 | 5.00 (2.54–8.91) | <0.001 |
| 80–89 | 87 (3) | 3.45 | 1.50 | 3, 3/0 | 1.30 | 2.31 (0.59–6.28) | 0.186 |
| 90–99 | 5 (0.2) | 0 | 4.00 | 0 | 0.20 | NA | NA |
*Bold text indicates statistically significant values. NA, not applicable; SMR, standardized mortality ratio (SMR) within 90 d after the reporting date of TBE; TBE, tick-borne encephalitis.
Page created: May 25, 2022
Page updated: June 18, 2022
Page reviewed: June 18, 2022
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