were obtained from dietary regarding The number of individual who ate certain food items. The following questions related to the information in the data table below. Those data appears in the table below: Exposed (
13) data were obtained from dietary regarding The number of individual who ate certain food items. The following questions related to the information in the data table below. Those data appears in the table below:
| Exposed ( Ate food item) |
Unexposed ( Did not eat food item) |
|
||
| Food items | ill | Total | I'll | Total |
| Hamburger | 3 | 19 | 8 | 17 |
| Beans | 5 | 11 | 11 | 25 |
| Ice tea | 7 | 8 | 26 | 28 |
| Lettuce | 7 | 14 | 6 | 22 |
| Tomato | 2 | 4 | 13 | 32 |
| Chicken salad | 7 | 8 | 3 | 28 |
| Ice cream | 20 | 22 | 13 | 14 |
| Apple Pie | 6 | 9 | 19 | 27 |
| Hot dog | 12 | 18 | 15 | 18 |
A) calculate the attack rate for each food item among those who were exposed (ate the food item) and those who were not exposed (did not eat the food item) as well as the rate differences
|
Exposed (ate food item |
Unexpected (did not eat food item) |
||||||
| Food items | ill | total | attack rate | ill | total |
attack |
Difference in attack rate |
|
Hamburger |
3 | 19 | 8 | 17 | |||
| beans | 5 | 11 | 11 | 25 | |||
| Ice tea | 7 | 8 | 26 | 28 | |||
| lettuce | 7 | 14 | 6 | 22 | |||
| tomato | 2 | 4 | 13 | 32 | |||
chicken salad |
7 | 8 | 3 |
28 |
|||
| Ice cream | 20 | 22 | 13 |
14 |
|||
|
Apple pie |
6 | 9 | 19 |
27 |
|||
| Hot dog | 12 | 18 | 15 |
18 |
B) can the rate differences also be called "excess risk" or "attributable risk"? Justify your answer in your own word
C) which food item had the largest difference in attack rate?
D) draw a fourfold table for this food item.
|
Ill (Diarrhea present) |
Well (Diarrhea absent) |
Total | ||
| Exposure |
exposed ( ate food item) |
|||
|
Unexpected (did not eat food item) |
||||
|
Total |
E) calculate the risk ratio for this food item.
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