Table 2.
Probability calculator with regression coefficient, showing an example of: 65-year-old pseudophakic man, with a 2-day history of loss of vision and pre-operative VA of 3/60, has an 85.4% chance of regaining VA of 6/12 or better if operated on less than 3 days compared to 76.2% chance if operated on 3–7 days.
| Factor | Operated <3 days | Operated between 3–7 days | Coefficient | ||
|---|---|---|---|---|---|
| Age 70–79 (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.331 |
| Age 80 + (1=yes, 0=no) | 0 | 0 | 0 | 0 | −0.546 |
| Female (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.269 |
| Pre-op VA 6/60-1/60 (1 = yes, 0=no) | 1 | −0.608 | 1 | −0.608 | −0.608 |
| Pre-op VA < 1/60 (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.902 |
| Mac-off 3-7 days (1 = yes, 0=no) | 0 | 0 | 1 | −0.604 | −0.604 |
| Mac-off 8–31 days (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.829 |
| Mac-off >31 days (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −1.684 |
| Duration not recorded/unknown (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.735 |
| PVR grade C (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.808 |
| Total RD (1 = yes, 0=no) | 0 | 0 | 0 | 0 | −0.697 |
| Any co-pathology (1 = yes, 0=no) | 0 | 0 | 0 | 0 | |
| Previous cataract surgery (1 = yes, 0=no) | 1 | 0.713 | 1 | 0.713 | 0.713 |
| Constant | 1.664 | 1.664 | |||
| 1.769 | 1.165 | ||||
| −1.769 | 0.170503407 | −1.165 | 0.311922662 | ||
| probability of 6/12+ vision = | 85.4% | 76.2% | |||