Table 3.
Regression models for the post-mortem retrievals (adjusted R2=0.71, p<0.0001, RMS error=0.174 MPa) and laboratory-prepared specimens (adjusted R2=0.49, p=0.0022, RMS error=0.992 MPa) relating the dependent variable tensile strength of the cement-bone interface and independent variables including morphology parameters contract fraction (CF), intersection fraction (IF), and cement-bone gap thickness (GT).
| Regression Model Term | Estimate | Standard error of mean | P value |
|---|---|---|---|
| Post-Mortem Retrievals | |||
| Constant (b1) | −0.066 | 0.072 | 0.365 |
| CF (b2) | 0.884 | 0.261 | 0.0015 |
| IF (b3) | 0.223 | 0.082 | 0.0090 |
| GT (b4) (mm) | 0.040 | 0.110 | 0.717 |
| Laboratory-Prepared | |||
| Constant (b1) | 2.93 | 0.561 | <0.0001 |
| CF (b2) | 2.64 | 0.651 | 0.0008 |
| IF (b3) | −1.5555 | 0.521 | 0.0083 |
| GT (b4) (mm) | −4.52 | 10.32 | 0.667 |