Table 5 VFQ rating scale
From: Validation of a vision-related activity scale for patients with retinitis pigmentosa
Category Label | Response Category | Count | OUTFIT MnSq | Andrich Threshold | Category Measure |
|---|---|---|---|---|---|
No difficulty at all | 1 | 1288 | 1.93 | – | (−2.24) |
A little difficulty | 2 | 1514 | 0.57 | −0.45 | − 0.91 |
Moderate difficulty | 3 | 5285 | 0.73 | −0.98 | − 0.03 |
Extreme difficulty | 4 | 5646 | 0.73 | .0.81 | 0.89 |
Stopped due to eyesight | 5 | 14,576 | 1.02 | .0.62 | (2.20) |