Table 2: Comparisons of all workers according to serological positivity, exposure to water in free time and subjective complaints.
| Exposure to CT water 2 - 45 hours/week | Seronegative 10 | Seropositive 13 | Total 23 |
| Exposure to water in free time | 4/10 40.0% |
5/13 38.5% |
9/23 39.1% |
| Complaints in the study time | 4/10 40.0% |
4/13 30.8% |
8/23 34.8% |
| Complaints before the study | 2/10 20.0% |
3/13 23.1% |
5/23 21.7% |