Table 3.
Results of functional tests and KOOS pain score
| Measured resection | Gap balancer | ||||
|---|---|---|---|---|---|
| Functional test | Adjusted mean (95% CI) | Adjusted mean (95% CI) | Adjusted mean difference (95% CI) | p-value | |
| Peak quadriceps torque (N) | |||||
| 6 weeks | − 2.75 (− 23.47 to 17.97) | − 6.41 (− 24.80 to 11.98) | 3.66 (− 34.99 to 42.31) | 0.783 | |
| 3 months | 11.40 (− 12.24 to 35.05) | 7.56 (− 14.41 to 29.54) | 3.84 (− 41.24 to 48.92) | 0.804 | |
| 6 months | 12.82 (− 36.25 to 61.89) | 20.20 (− 24.02 to 64.42) | − 7.38 (− 99.47 to 84.71) | 0.763 | |
| 1 year | 25.20 (− 12.92 to 63.33) | 25.56 (− 7.18 to 58.30) | -0.36 (− 70.34 to 69.62) | 0.988 | |
| Peak hamstring torque (N) | |||||
| 6 weeks | − 4.29 (− 23.75 to 15.18) | − 2.24 (− 21.24 to 16.77) | − 2.05 (− 40.07 to 35.97) | 0.838 | |
| 3 months | 1.80 (− 24.18 to 27.78) | 4.30 (-22.32 to 30.92) | − 2.50 (− 54.47 to 49.47) | 0.888 | |
| 6 months | 1.21 (− 12.21 to 14.63) | 12.37 (-1.05 to 25.79) | − 11.16 (− 37.67 to 15.35) | 0.273 | |
| 1 year | 7.38 (− 5.05 to 19.81) | 16.41 (4.60 to 28.23) | − 9.03 (− 32.97 to 14.91) | 0.316 | |
| Wii fit balance | |||||
| 6 weeks | -1.96 (-8.76—4.84) | 8.98 (2.04 to 15.93) | − 10.95 (− 20.80 to 1.09) | 0.030 | |
| 3 months | 7.44 (1.44—13.44) | 15.07 (9.03 to 21.11) | − 7.63 (− 16.28 to 1.02) | 0.083 | |
| 6 months | 12.45 (8.93–15.97) | 14.00 (10.56 to 17.45) | − 1.55 (− 6.60 to 3.50) | 0.540 | |
| 1 year | 13.53 (8.41—18.65) | 10.72 (5.43 to 16.01) | 2.81 (− 4.79 to 10.41) | 0.461 | |
| Timed up and go (s) | |||||
| 6 weeks | − 0.65 (− 1.63—0.34) | − 1.05 (− 2.03—− 0.06) | 0.40 (− 1.53 to 2.33) | 0.617 | |
| 3 months | 0.80 (− 2.24—3.85) | − 6.21 (− 9.18 − 3.24) | 7.01 (1.06 to 12.96) | 0.031 | |
| 6 months | − 3.39 (− 6.97—0.19) | − 2.24 (− 5.56—1.08) | − 1.15 (− 7.96 to 5.66) | 0.663 | |
| 1 year | − 3.55 (− 10.46 to 3.35) | − 3.09 (− 9.50 to 3.31) | − 0.46 (− 13.61 to 12.69) | 0.918 | |
| 6-min walk test (m) | |||||
| 6 weeks | 33.75 (− 8.29 to 75.79) | 52.35 (13.05–91.65) | − 18.60 (− 82.22 to 45.01) | 0.558 | |
| 3 months | 96.51 (53.96 to 139.5) | 124.22 (85.10–163.34) | − 27.72 (− 92.90 to 37.47) | 0.395 | |
| 6 months | 122.11 (77.1–167.09) | 147.45 (105.30–189.61) | − 25.34 (− 94.68 to 44.00) | 0.463 | |
| 1 year | 97.10 (53.73–140.48) | 155.09 (115.22–194.96 | − 57.98 (− 123.8 to 7.88) | 0.083 | |
| Timed stairs (s) | |||||
| 6 weeks | 5.76 (− 53.64 to 65.15) | − 13.21 (− 73.95 to 47.52) | 18.97 | (− 99.83 to 137.77) | 0.292 |
| 3 months | 1.37 (− 90.98 to 93.72) | − 20.97 (− 113.3 to 71.38) | 22.34 | (− 160.2 to 204.93) | 0.364 |
| 6 months | − 11.55 (− 45.73 to 22.62) | − 10.72 (− 43.29 to 21.85) | − 0.83 | (− 66.78 to 65.12) | 0.899 |
| 1 year | 15.78 (− 26.65 to − 4.91) | − 9.56 (− 20.17 to 1.05) | − 6.22 | (− 27.44 to 15.00) | 0.167 |
| Change in Range of motion (°) from pre-op | |||||
| 6 weeks | 0.07 (− 6.16–6.30) | 4.62 (− 1.79–11.03) | − 4.55 (− 11.47 to 2.38) | 0.195 | |
| 3 months | 6.39 (1.18–11.60) | 12.97 (7.62–18.31) | − 6.57 (− 12.42 to 0.73) | 0.028 | |
| 6 months | 13.58 (9.53–17.62) | 17.93 (13.88–21.97) | − 4.35 (− 8.92 to 0.22) | 0.062 | |
| 1 year | 16.78 (12.99–20.56) | 19.51 (15.67–23.35) | − 2.73 (− 7.03 to 1.56) | 0.209 | |
| KOOS pain | |||||
| 6 weeks | 16.03 (8.96–23.09) | 25.37 (18.67–32.07) | − 9.34 (− 18.25 to − 0.44) | 0.040 | |
| 3 months | 26.68 (20.24–33.11) | 36.13 (29.91–42.35) | − 9.45 (− 17.77 to − 1.13) | 0.027 | |
| 6 months | 34.05 (27.74–40.36) | 42.51 (36.23–48.78) | − 8.45 (− 16.88 to − 0.03) | 0.049 | |
| 1 year | 36.11 (30.17–42.06) | 46.66 (40.95–52.36) | − 10.54 (− 18.18 to − 2.90) | 0.008 | |
Bold values denote significant difference ie p < 0.05
The scores were analysed by means of Analysis of CoVariance (ANCOVA), change from baseline