Table 3.
Analysis of Patient and ACP Factors in the Prediction of KOOS5 Using a Generalized Estimating Equations Model a
| Factor | Coefficient (95% CI) | P |
|---|---|---|
| History of knee trauma | 0.0 (–8.5 to 8.5) | >.99 |
| Male sex | 5.1 (–9.4 to 20) | .49 |
| Bilateral treatment | –5.6 (–11 to –0.2) | .04 |
| Kellgren-Lawrence grade b | ||
| 1 (vs 0) | –11.6 (–21.0 to –2.2) | .02 |
| 2 (vs 1) | –5.2 (–12.1 to 1.7) | .14 |
| 3 (vs 2) | 0.0 (–8.7 to 8.7) | >.99 |
| 4 (vs 3) | –0.5 (–6.6 to 5.6) | .87 |
| BMI | 0.1 (–0.3 to 0.6) | .56 |
| Mean platelet concentration, ×109/L | 0.0 (0.0 to 0.0) | .79 |
| Mean leucocyte concentration, ×109/L | –0.7 (–1.7 to 0.3) | .17 |
| Mean erythrocyte concentration, ×109/L | –236.5 (–427 to 1.1) | .06 |
| Mean injected volume, mL | –3.8 (–8.2 to 0.5) | .09 |
| Mean platelet volume, fL | –3.7 (–7.8 to 0.3) | .08 |
a Corrected for age and months after treatment. Boldface P values indicate statistical significance (P < .05). BMI, body mass index.
b Each Kellgren-Lawrence grade was compared with the grade just before it using repeated-contrast coding.