Table II.
Comparison of the sagittal spine-pelvis-leg alignment parameters between patients with knee osteoarthritis and asymptomatic controls
| Control (n = 58) | KOA |
|||||||
|---|---|---|---|---|---|---|---|---|
| Total (n = 59) | p-value* | FI ⩽ 10° (n = 23) | p-value* | FI > 10° (n = 36) | p-value* | p-value† | ||
| SS | 32.7(7.6) | 35.0(9.0) | 0.074 | 32.9(7.0) | 0.510 | 36.4(10.3) | 0.012 | 0.138 |
| PT | 13.4(6.0) | 12.4(6.5) | 0.245 | 13.5(5.1) | 0.681 | 11.9(7.5) | 0.184 | 0.465 |
| PI | 46.8(9.0) | 47.3(10.3) | 0.476 | 46.2(8.0) | 0.954 | 48.3(11.9) | 0.279 | 0.359 |
| LL | 49.1(9.4) | 48.0(11.4) | 0.883 | 44.1(11.0) | 0.116 | 50.2(11.5) | 0.429 | 0.062 |
| SSA | 126.0(7.4) | 123.9(8.5) | 0.501 | 122.9(7.6) | 0.412 | 124.6(9.4) | 0.822 | 0.636 |
| C7T | 92.9(3.5) | 88.4(4.1) | < 0.001 | 89.9(3.6) | 0.008 | 87.5(4.4) | < 0.001 | 0.008 |
| SFA | 51.8(8.5) | 43.1(11.9) | < 0.001 | 49.9(8.9) | 0.188 | 38.8(11.6) | < 0.001 | < 0.001 |
| PFA | 9.1(8.1) | 2.2(8.9) | < 0.001 | 7.0(7.2) | 0.196 | –0.7(8.7) | < 0.001 | < 0.001 |
| FI | 4.2(3.5) | 11.3(5.1) | < 0.001 | 6.7(2.8) | 0.005 | 14.1(4.1) | < 0.001 | < 0.001 |
| Global balance pattern of spine (% within group) | ||||||||
| Normal balance | 49 (84.5) | 19 (32.2) | 10 (43.5) | 9 (25.0) | ||||
| Slight unbalance | 7 (12.1) | 24 (40.7) | 10 (43.5) | 14 (38.9) | ||||
| Severe unbalance | 2 (3.4) | 16 (27.1) | 3 (13.0) | 13 (36.1) | ||||
| Lower back pain (% within group) | ||||||||
| No | 20 (33.9) | 5 (21.7) | 15 (41.7) | |||||
| Yes | 39 (66.1) | 18 (78.3) | 21 (58.3) | |||||
the p-value by comparing with control
the p-value by comparing with KOA with FI ⩽ 10°
KOA, knee osteoarthritis; SS, sacral slope; PT, pelvic tilt; PI, pelvic incidence; LL, lumbar lordosis; SSA, spinosacral angle; C7T, C7 tilt; SFA, sacrofemoral angle; PFA, pelvic femoral angle; FI, femoral inclination
Data presented as mean (sd)
The distribution of global balance pattern between groups was compared with the chi-squared test. A significant difference was revealed between the controls and patients in total (x2 = 33.4, p = 5.5*10−8), patients with FI ⩽ 10° (chi squared = 14.0, p = 0.0009) or FI > 10° (chi squared = 34.7, p = 2.9*10−8)
Patients placed into a subgroup by FI showed no difference in prevalence of LBP