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. 2016 Nov 10;17:466. doi: 10.1186/s12891-016-1310-6

Table 5.

Baseline frequencies of semi-quantitative MRI biomarkers – cartilage

MRI feature Biomarker Overall n (%) Controls Cases p-value
Cartilage MOAKS Cartilage Morphology-Thickness-Max score across entire knee 0.012*
 0 150 (25 %) 118 (29.1 %) 32 (16.5 %)
 1 127 (21 %) 83 (20.4 %) 44 (22.7 %)
 2 290 (48 %) 184 (45.3 %) 106 (54.6 %)
 3 33 (6 %) 21 (5.2 %) 12 (6.2 %)
MOAKS Cartilage Morphology-Thickness-Number of subregions with score > 0 across entire knee
 0 150 (25 %) 118 (29.1 %) 32 (16.5 %)
 1 169 (28 %) 112 (27.6 %) 57 (29.4 %)
 2 123 (21 %) 82 (20.2 %) 41 (21.1 %)
 3 78 (13 %) 46 (11.3 %) 32 (16.5 %)
 4 54 (9 %) 34 (8.4 %) 20 (10.3 %)
 5 19 (3 %) 11 (2.7 %) 8 (4.1 %)
 6 4 (1 %) 2 (0.5 %) 2 (1.0 %)
 7 3 (1 %) 1 (0.2 %) 2 (1.0 %)
MOAKS Cartilage Morphology-Thickness-Number of subregions with score > 0 across entire knee category 0.002*
 0 150 (25 %) 118 (29.1 %) 32 (16.5 %)
 1,2 292 (49 %) 194 (47.8 %) 98 (50.5 %)
 3+ 158 (26 %) 94 (23.2 %) 64 (33.0 %)
MOAKS Cartilage Morphology-Surface Area - Max score across entire knee
 0 12 (2 %) 12 (3.0 %) 0 (0.0 %)
 1 28 (5 %) 22 (5.4 %) 6 (3.1 %)
 2 430 (72 %) 297 (73.2 %) 133 (68.6 %)
 3 130 (22 %) 75 (18.5 %) 55 (28.4 %)
MOAKS Cartilage Morphology-Surface Area - Max score across entire knee Category 0.004*
 0–1 40 (7 %) 34 (8.4 %) 6 (3.1 %)
 2 430 (72 %) 297 (73.2 %) 133 (68.6 %)
 3 130 (22 %) 75 (18.5 %) 55 (28.4 %)
MOAKS Cartilage Morphology-Surface Area-Number of subregions with score > 0 across entire knee
 0 12 (2 %) 12 (3.0 %) 0 (0.0 %)
 1 33 (6 %) 28 (6.9 %) 5 (2.6 %)
 2 50 (8 %) 34 (8.4 %) 16 (8.2 %)
 3 78 (13 %) 59 (14.5 %) 19 (9.8 %)
 4 102 (17 %) 81 (20.0 %) 21 (10.8 %)
 5 111 (19 %) 69 (17.0 %) 42 (21.6 %)
 6 88 (15 %) 54 (13.3 %) 34 (17.5 %)
 7 50 (8 %) 30 (7.4 %) 20 (10.3 %)
 8 36 (6 %) 18 (4.4 %) 18 (9.3 %)
 9 23 (4 %) 12 (3.0 %) 11 (5.7 %)
 10 13 (2 %) 7 (1.7 %) 6 (3.1 %)
 11 2 (0 %) 1 (0.2 %) 1 (0.5 %)
 12 1 (0 %) 1 (0.2 %) 0 (0.0 %)
 13 1 (0 %) 0 (0.0 %) 1 (0.5 %)
MOAKS Cartilage Morphology-Surface Area - Number of subregions with score > 0 across entire knee category <0.001*
 0–1 45 (8 %) 40 (9.9 %) 5 (2.6 %)
 2–4 230 (38 %) 174 (42.9 %) 56 (28.9 %)
 5–7 249 (42 %) 153 (37.7 %) 96 (49.5 %)
 8+ 76 (13 %) 39 (9.6 %) 37 (19.1 %)

*statistically significant at p < 0.05; p values refer to differences between cases and controls across all grades