Sensitivity and specificity of POI mean sum score compared with the diagnosis.
| Diagnosis | POI Mean Sum Score | |
|---|---|---|
| Negative Findings | Positive Findings | |
| Healthy | 93% (26/28) | 7% (2/28) |
| RA and OA | 27% (16/59) | 73% (43/59) |
| OA | 14% (3/21) | 86% (18/21) |
| RA | 34% (13/38) | 66% (25/38) |
POI: photo optical imaging; RA: rheumatoid arthritis; OA: osteoarthritis.