Table 2.
Annual Surveillance-Reported Lyme Borreliosis Incidence, by Region, Finland, 1995, 2011, and 2021
| Region | Annual incidence (unadjusted for underascertainment) |
||
|---|---|---|---|
| 1995a | 2011 | 2021 | |
| Northern | 1/100,000 | 7/100,000 | 28/100,000 |
| Eastern | 4/100,000 | 44/100,000 | 100/100,000 |
| Central | 2/100,000 | 21/100,000 | 55/100,000 |
| Western | 16/100,000 | 88/100,000 | 273/100,000 |
| Southern | 7/100,000 | 87/100,000 | 188/100,000 |
| Åland Islands | 258/100,000 | 2,617/100,000 | 2,847/100,000 |
| Nationwide | 7/100,000 | 67/100,000 | 153/100,000 |
a
1995 is the oldest year of accessible data on the Finnish Institute for Health and Welfare's website. Avohilmo reporting began in 2011; thus, only NIDR data were used for the 1995 incidence calculation. Number of cases used in calculations were adjusted for the 6.3% overlap between Avohilmo and NIDR.