Table 4.
Sensitivity Analysis: Underascertainment Multipliers and Estimate of Symptomatic Lyme Borreliosis Cases, Adults ≥30 Years, by Region, Finland, 2021, Using 5- and 20-Year Durations of Antibody Detection
| Region | Total number of reported LB cases among adults ≥30 years in 2011 | Estimated number of incident LB cases among adults ≥30 years in 2011 |
Multiplier (based on 2011 data) |
Total number of reported LB cases among adults ≥30 years in 2021 | Estimated number of LB cases among adults ≥30 years in 2021 |
|||
|---|---|---|---|---|---|---|---|---|
| 5 Years | 20 Years | 5 Years | 20 Years | 5 Years | 20 Years | |||
| Northern | 38 | 398 | 99 | 10.5 | 2.6 | 154 | 1,623 | 406 |
| Eastern | 319 | 3,085 | 771 | 9.7 | 2.4 | 705 | 6,828 | 1,707 |
| Central | 206 | 5,001 | 1,250 | 24.3 | 6.1 | 593 | 14,414 | 3,604 |
| Western | 539 | 833 | 208 | 1.5 | 1.0 | 1,703 | 1,703 | 1,703 |
| Southern | 1,372 | 4,617 | 1,154 | 3.4 | 1.0 | 3,411 | 11,477 | 3,411 |
| Åland Islands | 637 | 373 | 93 | 1.0 | 1.0 | 779 | 779 | 779 |
| Nationwide | 3,110 | 14,306 | 3,577 | 5.0a | 1.6a | 7,346 | 36,824 | 11,609 |
a
Nationwide multiplier is derived from regional multipliers, weighted by the population size of each region; therefore, nationwide multiplier is not simply the ratio of the national estimated number of incident LB cases in 2011 to the national number of reported LB cases in 2011.