Table 3.
Multivariate Logistic Regression of Tendon Discontinuity at 12 Months Postoperatively a
| Factor | Exp β | 95% CI | P |
|---|---|---|---|
| Demographic | — | — | |
| Age | 1.12 | 1.03-1.26 | .03 |
| Sex | — | — | .65 |
| Delayed repair b | — | — | .82 |
| Surgical | — | — | |
| Fixation type | — | — | .32 |
| Structural | — | — | |
| Tear size | — | — | .15 |
| SSP length | 0.89 | 0.8-0.98 | .02 |
| FI (Goutallier) c | — | — | |
| SSP | — | — | .41 |
| ISP | — | — | .95 |
| SSC | — | — | .79 |
| FI (Dixon MRI) c | — | — | |
| SSP | — | — | .57 |
| ISP | — | — | .76 |
| SSC | — | — | .53 |
| Tangent sign | — | — | .6 |
| Histological | — | — | |
| Lipid content muscle c | — | — | .59 |
| Slow MHC-I | — | — | .38 |
| Fast MHC-II | — | — | .38 |
| Hybrid MHC-I/MHC-II | 1.23 | 1.07-1.42 | .004 |
a
Dashes indicate areas not applicable. Boldface P values indicate statistical significance (P < .05). FI, fatty infiltration; ISP, infraspinatus; MHC, myosin heavy chain; MRI, magnetic resonance imaging; SSC, subscapularis; SSP, supraspinatus.
b
Delayed repair: surgery was >3 months after start of symptoms or trauma.
c
Different measurement modalities of fatty infiltration were input in the regression model separately.