Trends of Toxoplasma gondii seroprevalence in Portugal by region calculated with an interval confidence of 95%
| 1979/1980 | 2001/2002 | 2013 | ||||
|---|---|---|---|---|---|---|
| N | Seroprevalence (%) | n | Seroprevalence (%) | n | Seroprevalence (%) | |
| North | 405 | 51% (46% to 56%) | 426 | 45% (41% to 50%) | 464 | 13% (10% to 17%) |
| Centre | 590 | 47% (43% to 51%) | 426 | 38% (33% to 42%) | 344 | 29% (25% to 34%) |
| Lisbon | 302 | 47% (41% to 52%) | 630 | 33% (29% to 37%) | 504 | 23% (20% to 27%) |
| South | 378 | 43% (38% to 48%) | 171 | 25% (19% to 32%) | 128 | 33% (25% to 41%) |