Table 3 Comparison of the incidence of patellar tendon injury in Rigidfix system
Group | Angle | Patellar tendon injury | χ2 | P | ||
|---|---|---|---|---|---|---|
Yes | No | Incidence | ||||
A | 0 | 0 | 4 | 0.0% | 0.120 | 0.729 |
30 | 2 | 3 | 40.0% | |||
60 | 4 | 1 | 80.0% | |||
Subtotal | 6 | 8 | 42.9% | |||
B | 35–45 | 0 | 5 | 0.0% | ||
60 | 3 | 2 | 60% | |||
Subtotal | 3 | 7 | 30% | |||
Total | 9 | 15 | 37.5% | |||