Table 1.
Hazard Ratios for Revision Surgery and Subgroup Analysis of Survivorship.
| Risk factor | Hazard ratio | Confidence interval | P value |
|---|---|---|---|
| Age at surgery | 0.98 | 0.95-1.01 | .10 |
| Female gender | 1.54 | 0.73-3.15 | .25 |
| Laborer | 1.10 | 0.53-2.24 | .79 |
| Smoker | 1.67 | 0.56-4.05 | .32 |
| Dominant hand | 1.06 | 0.52-2.17 | .87 |
| Number of prior surgeries | 1.53 | 1.16-1.95 | .003* |
| Lawsuit pending | <0.01 | — | .38 |
| Worker’s compensation | <0.01 | — | .40 |
| Primary diagnosis | |||
| Non-SLAC/SNAC arthritis | 0.26 | 0.04-0.87 | .03* |
| Inflammatory arthritis | 1.07 | 0.43-2.37 | .87 |
| Posttraumatic arthritis | 2.26 | 0.54-6.50 | .23 |
| Ligamentous | 0.53 | 0.03-2.48 | .49 |
| SNAC/SLAC arthritis | 1.88 | 0.92-3.85 | .08 |
| Kienböck or Preiser disease | 1.36 | 0.08-6.37 | .77 |
| Unknown | 0.35 | 0.02-1.64 | .23 |
| Subgroup analysis of survivorship | |||
| Risk factor | % revised at any time point | 5-year survivorshipa | 10-year survivorshipa |
| Non-SLAC/SNAC arthritis (n = 21) | 9.5% | 86% | 86% |
| Unknown (n = 7) | 14% | 86% | 86% |
| Ligamentous only (n = 6) | 17% | 83% | 83% |
| Kienböck or Preiser (n = 3) | 33% | 67% | 67% |
| Inflammatory arthritis (n = 19) | 37% | 73% | 66% |
| Posttraumatic arthritis (n = 7) | 43% | 57% | 57% |
| SLAC or SNAC arthritis (n = 37) | 43% | 59% | 53% |
Note. SLAC = scapholunate advanced collapse; SNAC = scaphoid nonunion advanced collapse.
a
Values are given as the Kaplan-Meier survival estimate.
*
Values in bold represent significant P value.