Table I.
Knees with mJSN grade 1 vs CL knees without JSN: tibial coverage, meniscus position and meniscus size
| mJSN1 (n = 43)
|
CL no-JSN
|
Diff*
|
P-value | |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean [95% CI] | ||
| Medial meniscus | ||||
| Tibial plateau coverage | ||||
| ACdAB.Covp [%] | 36.0 ± 8.75 | 45.1 ± 8.36 | −9.14 [−12.2–(−6.08)] | <0.001 |
| OvD.Me [mm] | −9.01 ± 2.13 | −11.3 ± 2.57 | 2.26 [1.56–2.96] | <0.001 |
| OvD.Max [mm] | −2.43 ± 1.69 | −3.88 ± 1.92 | 1.44 [0.85–2.03] | <0.001 |
| OvD.c5 [mm] | 4.08 ± 2.31 | 6.79 ± 3.20 | 2.71 [1.90–3.51] | <0.001 |
| Meniscus extrusion | ||||
| Ex.Me [mm] | 3.45 ± 1.46 | 2.11 ± 1.51 | 1.34 [0.92–1.76] | <0.001 |
| Ex.Max [mm] | 7.05 ± 1.84 | 6.60 ± 1.48 | 0.45 [−0.04–0.94] | 0.068 |
| Ex.c5 [mm] | 3.09 ± 1.81 | 1.84 ± 1.26 | 1.25 [0.76–1.74] | <0.001 |
| TA.uncovp [%] | 26.5 ± 11.4 | 16.3 ± 8.11 | 10.2 [6.84–13.6] | <0.001 |
| Meniscus size | ||||
| Wid.Me [mm] | 8.13 ± 1.50 | 9.24 ± 1.57 | −1.11 [−1.54–(−0.68)] | <0.001 |
| Wid.Max [mm] | 14.1 ± 2.68 | 16.3 ± 3.15 | −2.21 [−3.02–(−1.41)] | <0.001 |
| Wid.c5 [mm] | 7.39 ± 2.20 | 9.39 ± 2.94 | −1.76 [−2.58–(−0.95)] | <0.001 |
| Th.Me [mm] | 2.67 ± 0.502 | 2.72 ± 0.532 | −0.05 [−0.15–0.06] | 0.399 |
| Th.Mav [mm] | 6.63 ± 1.52 | 6.44 ± 1.32 | 0.18 [−0.18–0.54] | 0.318 |
| V [mm3] | 1930 ± 747 | 2112 ± 871 | −182[−330–(−34.1)] | 0.017 |
| TOTA [mm2] | 1470 ± 371 | 1553 ± 412 | −83.5 [−148–(−18.9)] | 0.013 |
| Lateral meniscus | ||||
| Tibial plateau coverage | ||||
| ACdAB.Covp [%] | 57.2 ± 5.61 | 57.8 ± 5.21 | −0.59 [−2.38–1.20] | 0.510 |
| OvD.Me [mm] | −15.9 ± 2.58 | −16.1 ± 2.16 | 0.12 [−0.28–0.52] | 0.559 |
| OvD.Max [mm] | −8.70 ± 2.28 | −8.60 ± 2.17 | −0.10 [−0.50–0.29] | 0.600 |
| OvD.c5 [mm] | −9.95 ± 2.42 | −9.89 ± 2.45 | −0.06 [−0.51–0.40] | 0.798 |
| Meniscus extrusion | ||||
| Ex.Me [mm] | −1.41 ± 1.99 | −1.31 ± 1.86 | −0.11 [−0.62–0.41] | 0.681 |
| Ex.Max [mm] | 7.24 ± 1.81 | 7.49 ± 2.01 | −0.25 [−0.86–0.36] | 0.409 |
| Ex.c5 [mm] | 0.50 ± 1.19 | −0.28 ± 1.13 | −0.21 [−0.53–0.11] | 0.183 |
| TA.uncovp [%] | 3.90 ± 4.20 | 4.45 ± 3.97 | −0.54 [−1.80–0.71] | 0.386 |
| Meniscus size | ||||
| Wid.Me [mm] | 8.85 ± 1.41 | 8.99 ± 1.26 | −0.14 [−0.42–0.15] | 0.348 |
| Wid.Max [mm] | 12.7 ± 1.96 | 12.7 ± 1.61 | −0.02 [−0.45–0.41] | 0.912 |
| Wid.c5 [mm] | 10.6 ± 2.21 | 10.7 ± 2.17 | −0.12 [−0.62–0.38] | 0.628 |
| Th.Me [mm] | 2.64 ± 0.445 | 2.62 ± 0.392 | 0.02 [−0.06–0.10] | 0.627 |
| Th.Mav [mm] | 6.60 ± 1.05 | 6.61 ± 1.05 | −0.01 [−0.22–0.20] | 0.929 |
| V [mm3] | 1964 ± 652 | 2001 ± 602 | −36.9 [−148.2–74.4] | 0.508 |
| TOTA [mm2] | 1509 ± 334 | 1536 ± 303 | −26.9 [−84.4–30.7] | 0.351 |
Mean of the pairwise differences (may deviation from difference between group means); ACdAB.Covp: area of cartilage surface covered with meniscus in percent; Ex.Me: mean external extrusion; Ex.Max: maximal external extrusion; OvD.Me: mean overlap distance; OvD.Max: maximal overlap distance. Note that a positive value for meniscal extrusion indicates an external position relative to the external border of the tibial plateau. Whereas a negative value indicates an internal position relative to the external border. A more negative value for the overlap distance indicates a more internal position of the inner margin of the meniscus; TA.uncovp: tibial area of the meniscus not covering the tibial plateau in percent; TOTA: sum of all three surface areas of the meniscus; V: volume of the meniscus; Th.Me: mean thickness of the meniscus; Th.Mav: average thickness of the meniscus; Wid.Me: mean width of the meniscus; Wid.max: maximal width of the meniscus; Ex.c5: mean extrusion in the central five slices; Wid.c5: mean width in the central five slices; OvD.c5: mean overlap distance in the central five slices.