TABLE V.
Postoperative Characteristics According to Group*
| Handrail Use at Three Months |
Handrail Use at Two Years |
|||||
| Variable† | No Handrail | Handrail | P Value | No Handrail | Handrail | P Value |
| Age (yr) | 62.6 ± 8.4 | 67.7 ± 8.9 | 0.005‡ | 64.4 ± 7.6 | 70.4 ± 9.1 | 0.001‡ |
| Weight (kg) | 87.8 ± 14.8 | 91.0 ± 19.0 | 0.389 | 87.8 ± 14.8 | 91.9 ± 18.3 | 0.408 |
| Body mass index (kg/m2) | 30.0 ± 4.0 | 30.9 ± 6.0 | 0.426 | 30.0 ± 4.0 | 31.8 ± 6.3 | 0.985 |
| Stair-climbing task (s) | 13.0 ± 4.0 | 14.6 ± 5.3 | 0.112 | 11.7 ± 2.6 | 13.4 ± 5.1 | 0.042‡ |
| KOS-ADLS (%) | 79.8 ± 11.0 | 79.3 ± 11.3 | 0.825 | 84.9 ± 12.9 | 85.2 ± 12.1 | 0.93 |
| Quadriceps index (%) | 75.3 ± 23.9 | 76.1 ± 22.2 | 0.875 | 100.5 ± 31.1 | 98.7 ± 32.0 | 0.241 |
| Quadriceps strength (N/BMI) | ||||||
| Operative side | 17.1 ± 6.3 | 16.7 ± 6.9 | 0.77 | 22.4 ± 9.1 | 17.8 ± 6.6 | 0.003‡ |
| Nonoperative side | 23.7 ± 8.7 | 22.8 ± 8.8 | 0.588 | 22.5 ± 9.8 | 19.2 ± 7.9 | 0.06 |
| Range of motion (deg) | ||||||
| Extension | 1.9 ± 2.8 | 2.0 ± 2.5 | 0.847 | −0.7 ± 3.1 | 0.6 ± 2.5 | 0.024‡ |
| Flexion | 116.7 ± 10.5 | 116.4 ± 11.5 | 0.914 | 121.4 ± 11.7 | 119.7 ± 10.8 | 0.449 |
*
The values are given as the mean and the standard deviation.
†
BMI = body mass index; KOS-ADLS = Knee Outcome Survey Activities of Daily Living Scale.
‡
At three months, a significant difference was found between groups with regard to age. At two years, significant differences were found between groups with regard to age, stair-climbing time, quadriceps strength on the involved side, and knee extension range of motion.