TABLE 2.
Consumption of selected food or water items by case patients and control individuals in the affected areas between 1 September and 31 December 1999
| Food | No. (%) of persons who consumed the food
|
||
|---|---|---|---|
| Cases (n = 189) | Controls (n = 202) | Odds ratio (95% confidence interval) | |
| Coquina clams | 155 (82.0) | 110 (54.4) | 3.81 (2.33-6.26) |
| Other clams | 0 (0.0) | 2 (1.0) | |
| Mussels | 37 (19.6) | 46 (22.8) | 0.83 (0.49-1.39) |
| Jackknife clams | 8 (4.2) | 4 (1.9) | 2.19 (0.58-8.89) |
| Oysters | 0 (0.0) | 0 (0.0) | |
| Crustacean shellfish | 30 (15.9) | 39 (19.3) | 0.79 (0.45-1.38) |
| Vegetables | 131 (69.3) | 137 (67.8) | 1.07 (0.68-1.69) |
| Spring water | 156 (82.5) | 178 (88.1) | 0.64 (0.35-1.17) |
| Tap water | 45 (23.8) | 54 (26.7) | 0.86 (0.53-1.39) |
| Bottled water | 54 (28.5) | 55 (27.2) | 1.07 (0.67-1.71) |