Table 4.
Summary of stair ascent studies of stride velocity and knee joint kinematics of unicompartmental, TKAs, and healthy knees
| Study, year | Stair dimensions (height:depth; cm) | Knee type (number) | Stride velocity (cm/s) | Extension displacement (°) | Flexion displacement (°) | Adduction displacement (°) | Abduction displacement (°) | Internal rotation displacement (°) | External rotation displacement (°) |
|---|---|---|---|---|---|---|---|---|---|
| Catani et al. [9], 2003 | 16:28 | TKA (20) | 36.2* | – | 76* | – | – | – | – |
| Healthy (10) | 43.3 | – | 89 | – | – | – | – | ||
| Costigan et al. [10], 2002 | 20:30 | Healthy (35)† | 43.6 | 58‡ | 80 | 4 | 3 | 2 | 1 |
| Protopapadaki et al. [25], 2007 | 18:28.5 | Healthy (33) | 49 | 50 | 92 | ||||
| Reeves et al. [26], 2008 | 17:28 | Healthy (15) | 92 (step/min) | 49 | 79 | – | – | – | – |
| Riener et al. [27], 2002 | 22.5:25 | Healthy (10) | – | 68 | 90 | ||||
| Weinstein et al. [32], 1986 | MED-UKA (8) | – | – | 81a | – | – | – | – | |
| The current study | 20:28 | MED-UKA (17) | 38.3 | 53 | 85 | 11 | 17 | 15 | 23 |
| LAT-UKA (9) | 36.5 | 58 | 88 | 9 | 16 | 14 | 22 |
* Average from two different UKA/TKA groups; †underlined: participants are young adults; ‡bold: displacement values of other studies were estimated using angle graphs of group-ensemble averages; MED = medial; UKA = unicompartmental knee arthroplasty; LAT = lateral.