Table 3.
Univariable correlation between demographic/clinical characteristics and 5-year AOFAS
| Categorical variables | AOFAS score (mean ± SD) | P-value* |
|---|---|---|
| Sex | 0.211 | |
| Male (n = 42) | 78.7 ± 6.5 | |
| Female (n = 96) | 77.7 ± 6.4 | |
| Number of PRP injections# | 0.0013 | |
| 0 (n = 42) | 76.7 ± 4.9 | |
| 1–2 (n = 60) | 76.3 ± 4.8 | |
| ≥ 3 (n = 36) | 85.0 ± 3.4 | |
| Intraoperative PRP injection | 0.293 | |
| No (n = 60) | 78.7 ± 6.0 | |
| Yes (n = 78) | 78.6 ± 6.6 | |
| Larsen grade before surgery | 0.013 | |
| 0, 1 (n = 81) | 81.1 ± 5.9 | |
| 2, 3 (n = 57) | 75.1 ± 5.4 | |
| Continuous variables | Mean ± SD | Correlation coefficient | P-value† |
|---|---|---|---|
| Age at baseline, years | 51.6 ± 7.9 | −0.225 | 0.017 |
| BMI at baseline | 25.3 ± 3.3 | −0.235 | 0.079 |
| Mean BMI change from baseline** | 0.74 ± 4.6 | −1.469 | < 0.001 |
| Duration of symptoms before surgery, months | 13.61 ± 7.77 | 0.913 | 0.021 |
| Preoperative AOFAS score | 62.74 ± 5.63 | 0.017 | 0.814 |
| Preoperative FAOS score | 51.83 ± 11.39 | 0.011 | 0.613 |
Boldface P-values indicate variables included in the multivariable analysis (P < 0.2)
*Kruskal–Wallis test
†Univariable linear regression
#Number of injections during the study period (intraoperatively and postoperatively)
**Mean BMI change from baseline = (mean BMI from years 1 through 5) − BMI at baseline