Table 1 Comparison of parameters between the control and observation groups
Parameters | Group A(n = 23) | Group A(n = 22) | Statistical value | P |
|---|---|---|---|---|
Gender | ||||
Man | 13(56.5%) | 13 (59.1%) | χ2 = 0 | 1 |
Female | 10 (43.5%) | 9 (40.9%) | ||
Side | ||||
Left | 13 (56.5%) | 14 (63.6%) | χ2 = 0.3 | 0.855 |
Right | 10 (43.5%) | 8 (36.4%) | ||
Age (year) | 44.3 ± 11.8 | 46.5 ± 11.5 | t = − 0.63 | 0.53 |
Mechanism of injury | ||||
Indirect violence | 9 (39.1%) | 7 (31.8%) | χ2 = 0.04 | 0.841 |
Direct violence | 14 (60.9%) | 15 (68.2%) | ||
Time from injury to surgery (day) | 4.3 ± 1.3 | 4.5 ± 1.3 | t = − 0.51 | 0.61 |
Classification of patella fractures | ||||
Type I | 10 (43.5%) | 11 (50.0%) | χ2 = 0.21 | 0.902 |
Type II | 12 (52.2%) | 10 (45.5%) | ||
Type VI | 1 (4.3%) | 1 (4.5%) | ||