Table 1 Characteristics of the patients and knees in the OAI subset with different image modalities in the study
Baseline | 48 months | |||||
|---|---|---|---|---|---|---|
Controls | Cases | Total | Controls | Cases | Total | |
nonQC-CR | (k=1723) | (k=286) | (k=2009) | (k=1723) | (k=286) | (k=2009) |
Age (years) | 62.3 (±9.0) | 62.4 (±8.1) | 62.3 (±8.8) | 66.3 (±9.0) | 66.4 (±8.1) | 66.3 (±8.1) |
BMI (kg/m2) | 29.4 (±4.6) | 30.6 (±4.7) | 29.6 (±4.7) | 29.3 (±4.8) | 31.0 (±5.0) | 29.6 (±4.9) |
Gender | ||||||
F | 59% | 51% | 58% | − | − | − |
M | 41% | 49% | 42% | − | − | − |
Medial JSN grade | ||||||
0 | 741 | 41 | 782 | 741 | 0 | 741 |
1 | 617 | 116 | 733 | 617 | 21 | 638 |
2 | 365 | 129 | 494 | 365 | 119 | 484 |
3 | 0 | 0 | 0 | 0 | 146 | 146 |
Lateral JSN grade | ||||||
0 | 1421 | 270 | 1691 | 1394 | 264 | 1658 |
1 | 171 | 12 | 183 | 133 | 10 | 143 |
2 | 131 | 4 | 135 | 136 | 11 | 147 |
3 | 0 | 0 | 0 | 60 | 1 | 61 |
nonQC-RG | (k=592) | (k=139) | (k=731) | (k=592) | (k=139) | (k=731) |
Age (years) | 62.9 (±9.1) | 62.9 (±8.1) | 62.4 (±8.8) | 66.3 (±9.0) | 66.9 (±8.1) | 66.4 (±8.1) |
BMI (kg/m2) | 29.9 ( ± 5.2) | 31.0 (±5.1) | 30.1 (±5.2) | 29.9 (±5.4) | 31.4 (±5.6) | 30.2 (±5.5) |
Gender | ||||||
F | 67% | 63% | 36% | − | − | − |
M | 33% | 37% | 34% | − | − | − |
Medial JSN grade | ||||||
0 | 245 | 23 | 268 | 245 | 0 | 245 |
1 | 208 | 44 | 252 | 208 | 9 | 217 |
2 | 139 | 72 | 211 | 139 | 53 | 192 |
3 | 0 | 0 | 0 | 0 | 77 | 77 |
Lateral JSN grade | ||||||
0 | 498 | 134 | 632 | 489 | 134 | 623 |
1 | 48 | 2 | 50 | 35 | 1 | 36 |
2 | 46 | 3 | 49 | 39 | 3 | 42 |
3 | 0 | 50 | 0 | 29 | 1 | 30 |
QC-CR | (k=1419) | (k=228) | (k=1647) | (k=1419) | (k=228) | (k=1647) |
Age (years) | 62.7 (±9.0) | 62.7 (±8.2) | 62.7 (±8.9) | 66.7 (±9.0) | 66.7 (±8.2) | 66.7 (±8.2) |
BMI (kg/m2) | 29.3 (±4.6) | 30.4 (±4.6) | 29.5 (±4.6) | 29.3 (±4.8) | 30.7 (±4.9) | 29.5 (±4.8) |
Gender | ||||||
F | 59% | 47% | 57% | − | − | − |
M | 41% | 53% | 43% | − | − | − |
Medial JSN grade | ||||||
0 | 620 | 31 | 651 | 620 | 0 | 620 |
1 | 496 | 90 | 586 | 496 | 15 | 511 |
2 | 303 | 107 | 410 | 303 | 91 | 394 |
3 | 0 | 0 | 0 | 0 | 122 | 122 |
Lateral JSN grade | ||||||
0 | 1164 | 219 | 1383 | 1142 | 215 | 1357 |
1 | 146 | 7 | 153 | 114 | 7 | 121 |
2 | 109 | 2 | 111 | 112 | 6 | 118 |
3 | 0 | 0 | 0 | 51 | 0 | 51 |
QC-RG | (k=407) | (k=94) | (k=501) | (k=407) | (k=94) | (k=501) |
Age (years) | 62.0 (±8.9) | 62.4 (±8.6) | 62.1 (±8.9) | 66.01 (±8.9) | 66.4 (±8.6) | 66.1 (±8.6) |
BMI (kg/m2) | 29.8 (±5.3) | 30.5 (±5.4) | 29.9 (±5.3) | 29.9 (±5.6) | 30.9 (±5.8) | 30.1 (±5.6) |
Gender | ||||||
F | 71% | 72% | 71% | − | − | − |
M | 29% | 28% | 29% | − | − | − |
Medial JSN grade | ||||||
0 | 184 | 16 | 200 | 184 | 0 | 184 |
1 | 134 | 29 | 163 | 134 | 7 | 141 |
2 | 89 | 49 | 138 | 89 | 34 | 123 |
3 | 0 | 0 | 0 | 0 | 53 | 53 |
Lateral JSN grade | ||||||
0 | 341 | 89 | 430 | 335 | 89 | 424 |
1 | 35 | 2 | 37 | 23 | 1 | 24 |
2 | 31 | 3 | 34 | 27 | 3 | 30 |
3 | 0 | 0 | 0 | 22 | 1 | 23 |