Table 2. Health status among study participants at enrollment and follow-up.
| Reported Health Outcomes | Swimmers (n = 618) | Non-Swimmers (n = 274) | ||
| Health Status at Beach Enrollment (No. (%)) | Health Status at Follow-upa (No. (%)) | Health Status at Beach Enrollment (No. (%) | Health Status at Follow-upa (No. (%)) | |
| No Reported GI Problems | 600 (97) | 562 (94) | 259 (95) | 251 (97) |
| Any GI Illness | 18 (2.9) | 38 (6.3) | 15 (5.5) | 8 (3.1) |
| Chronic GI Problems | 9 (1.5) | NDb | 8 (2.9) | NDb |
| Diarrhea | 6 (0.97) | 28 (4.6) | 5 (1.8) | 8 (3.1) |
| Fever | ND | 10 (1.6) | ND | 2 (0.73) |
| Stomach Cramps | ND | 8 (1.2) | ND | 8 (1.2) |
| Nausea + Other GI Illness | ND | 7 (1.2) | ND | 1 (0.36) |
| Nausea Only | ND | 3 (0.50) | ND | 0 (0.00) |
| Vomiting | 6 (0.97) | 10 (1.6) | 3 (1.1) | 1 (0.36) |
| HCGI | ND | 13 (2.2) | 267 (97) | 1 (0.37) |
a
Health status at telephone follow-up excluding positive cases at enrollment.
Not determined as information was not collected by the questionnaire.