Table 4 ICRS gross grading scale
Feature | Score | No. 1 | No. 2 | No. 3 | Mean ± SE | |||||
|---|---|---|---|---|---|---|---|---|---|---|
R | L | R | L | R | L | R | L | |||
Coverage | > 75% fill | 4 | 3 | 2 | 2 | 2 | 1 | 1 | 2.0 ± 0.6 | 1.7 ± 0.3 |
50–75% fill | 3 | |||||||||
25–50% fill | 2 | |||||||||
< 25% full | 1 | |||||||||
No fill | 0 | |||||||||
Neocartilage colour | Normal | 4 | 3 | 2 | 1 | 1 | 1 | 1 | 1.7 ± 0.7 | 1.3 ± 0.3 |
25% yellow/brown | 3 | |||||||||
50% yellow/brown | 2 | |||||||||
75% yellow/brown | 1 | |||||||||
100%yellow/brown | 0 | |||||||||
Defect margins | Invisible | 4 | 3 | 2 | 2 | 2 | 1 | 1 | 2.0 ± 0.6 | 1.7 ± 0.3 |
25% circumference visible | 3 | |||||||||
50% circumference visible | 2 | |||||||||
75% circumference visible | 1 | |||||||||
Entire circumference visible | 0 | |||||||||
Surface | Smooth/level with normal | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0.7 ± 0.3 | 1.0 ± 0.0 |
Smooth but raised | 3 | |||||||||
Irregular 25–50% | 2 | |||||||||
Irregular 50–75% | 1 | |||||||||
Irregular > 75% | 0 | |||||||||
Average (0–4) | 2.5 | 1.8 | 1.5 | 1.5 | 0.8 | 1.0 | 1.6 ± 0.5 | 1.4 ± 0.2 | ||