Table 4. Multiple linear regression analysis of predictors of the proportion of ACL-MSCs at passage 0 in overall patients and in the ACL reconstruction and total knee arthroplasty groups.
| Dependentvariables | Independent Variables | Unstandardized coefficients | Standardized coefficients | |||
|---|---|---|---|---|---|---|
| B | SE (B) | β | P-value | VIF | ||
| ACL-MSC P0 (%) of overall subjects | Age | 0.018 | 0.056 | 0.046 | 0.750 | 1.423 |
| Gender (male) | -2.762 | 2.317 | -0.167 | 0.238 | 1.374 | |
| Body mass index | 0.172 | 0.272 | 0.080 | 0.529 | 1.119 | |
| ACL-MSC P0 (%) of ACL reconstruction group | Age | -0.301 | 0.101 | -0.445 | 0.065 | 1.034 |
| Gender (male) | -2.358 | 2.546 | -0.144 | 0.361 | 1.120 | |
| Body mass index | 0.402 | 0.343 | 0.178 | 0.251 | 1.085 | |
| ACL-MSC P0 (%) of TKA group | Age | 0.175 | 0.291 | 0.107 | 0.552 | 1.007 |
| Gender (male) | 7.135 | 4.671 | 0.276 | 0.137 | 1.043 | |
| Body mass index | -0.352 | 0.385 | -0.166 | 0.368 | 1.050 | |
P, passage; MSC, mesenchymal stem cell; ACL, anterior cruciate ligament
B, unstandardized coefficients; SE (B), standard error of B; β standardized coefficients
The adjusted R2 for ACL-MSC proportion at passage 0 were 0.053 in all patients, 0.228 in the ACL reconstruction group, and 0.095 in the TKA group.