Exposed | Non-exposed | RR | 95% CI | p value (2-sided Fisher's exact) | Percentage of cases exposed | |||
---|---|---|---|---|---|---|---|---|
n/N | AR (%) | n/N | AR (%) | |||||
Group C (n = 22, N = 33) | ||||||||
Water from dispenser† | 18/21 | (85) | 2/7 | (29) | 3.0 | 0.9–9.8 | <0.01 | 90 |
Ice cubes from the bar | 19/24 | (79) | 1/3 | (33) | 2.4 | 0.5–11.9 | 0.2 | 95 |
Tap water | 14/16 | (88) | 3/8 | (38) | 2.3 | 0.9–5.8 | 0.02 | 82 |
Broccoli soup* | 21/24 | (88) | 0/4 | (0) | 8 | - | <0.01 | 100 |
Bottled water (commercial) | 7/13 | (54) | 9/10 | (90) | 0.6 | 0.4–1.0 | 0.1 | 44 |
Fruit | 9/14 | (64) | 6/7 | (86) | 0.8 | 0.5–1.2 | 0.3 | 60 |
Combined Group C and D (n = 23, N = 43) | ||||||||
Water from dispenser† | 18/28 | (64) | 2/7 | (29) | 2.2 | 0.7–7.5 | 0.1 | 90 |
Ice cubes from the bar | 19/24 | (79) | 1/9 | (11) | 7.1 | 1.1–45.7 | <0.001 | 95 |
Tap water | 14/22 | (64) | 3/10 | (30) | 2.1 | 0.8–5.8 | 0.1 | 82 |
Broccoli soup* | 22/32 | (69) | 0/4 | (0) | 8 | - | 0.02 | 100 |
Bottled water (commercial) | 7/15 | (47) | 9/15 | (60) | 0.8 | 0.4–1.5 | 0.5 | 44 |
Fruit | 9/22 | (41) | 6/7 | (86) | 0.5 | 0.3–0.9 | 0.1 | 60 |