Table 2.
Mean values (±SD) of medJSW, latJSW, tibia width and anatomical angle of the knees from the subjects.
| Parameter | Mean ± SD | Statistical significance | ||||
|---|---|---|---|---|---|---|
| Subjects (KBD grades) | Control (0) | KBD total (KBD) | KBD grade 1 (1) | KBD grade 2 (2) | KBD grade 3 (3) | |
| medJSW | 4.22 ± 0.9 | 3.96 ± 1.2 | 4.38 ± 0.8 | 3.71 ± 1.3 | 3.15 ± 1.3 | 0–3*, 1–2*, 1–3* |
| latJSW | 4.03 ± 1.0 | 4.15 ± 1.8 | 4.24 ± 1.8 | 4.19 ± 2.1 | 3.76 ± 0.8 | none |
| Tibia width | 73.18 ± 5.1 | 77.09 ± 7.6 | 75.17 ± 7.0 | 79.80 ± 8.2 | 76.69 ± 6.7 | 0-KBD**, 0–2**, 0–3* |
| Anatomical angel, genu valgus | 182.11 ± 2.9 | 183.60 ± 7.0 | 183.78 ± 4.1 | 182.92 ± 10.5 | 184.71 ± 3.1 | 0–1*, 0–3* |
| −2.11 ± 2.9 | −3.60 ± 7.0 | −3.78 ± 4.1 | −2.92 ± 10.5 | −4.71 ± 3.1 | 0–1*, 0–3* | |
Normal control subjects, n = 98; total KBD patients, n = 49; KBD grade 1, n = 24, KBD grade 2, n = 18 and KBD grade 3, n = 7. SD: standard deviation; KBD: Kashin-Beck disease; medJSW: minimum joint space width measured from 75% medial compartment; latJSW: minimum joint space width measured from 75% lateral compartment; Genu varus/valgus were calculated with the equation: 180° - anatomical angle; **stands for p value is equal or less than 0.001, *represents that p value is less than 0.05.