Table 1
Benefit matrix based on Yager’s decision theory16
| Benefit level | Item area | ||||
|---|---|---|---|---|---|
| 1 Disability |
2 Cataract symptom |
3 Activity |
4 Car driving |
5 Off sick? |
|
| 5 Very good | + | + | +/±0 | +/±0 | +/±0 |
| 4 Good | + | + | |||
| 3 Moderate | + | ||||
| or | ±0 | + | |||
| 2 Questionable | ±0 | ||||
| or | - | + | + | ||
| 1 No benefit | - | ||||
-
In benefit level 5 an improvement of at least one of item areas 3, 4, or 5 is demanded. A conservation of a preoperative activity (= an activity ranking sum < 24 or being a car driver or not being “off sick”) is equal to an improvement in this benefit matrix.
