Table 4.
Population estimates of cases and non-cases of Cryptosporidium-infection in Skellefteå between December 2010 and May 2011 divided into water supply categories
| Status | Category | N | SE (N) | 95% CI (N) | N (%) |
|---|---|---|---|---|---|
| Non-cases | Not Abborrverket WTP | 22,649 | 642 | 21,392 – 23,906 | 83.8 |
| Abborrverket WTP | 28,696 | 1033 | 26,944 – 30,994 | 67.3 | |
| Cases | Not Abborrverket WTP | 4368 | 624 | 3145 – 5590 | 16.2 |
| Abborrverket WTP | 14,081 | 1019 | 12,084 – 16,078 | 32.7 |
N number, SE standard error, CI confidence interval
Based on postal questionnaire