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Number of patients to be observed to detect a given adverse event, modified from75
| Expected incidence of adverse drug reaction | Number of patients to be observed to detect: | ||
|---|---|---|---|
| 1 event | 2 events | 3 events | |
| 1:100 | 300 | 480 | 650 |
| 1:200 | 600 | 960 | 1300 |
| 1:1000 | 3000 | 4800 | 6500 |
| 1:2000 | 6000 | 9600 | 13 000 |
| 1:10 000 | 30 000 | 48 000 | 65 000 |
