Question
The table below shows data from a study of oral contraceptive use in relation to development of bacteriuria. Calculate the Risk Difference from this table.
Bacteriuria
|
No bacteriuria
|
Total
| |
Oral contraceptive use
|
27
|
455
|
482
|
No oral contraceptive use
|
77
|
1831
|
1908
|
Total
|
104
|
2286
|
2390
|
