Table 3.
Multivariate Differences of VAS Pain Scores in Medicaid Versus All Other Modes of Insurance (Medicare, Private, Uninsured).
| Payer status | Preoperative VAS
a
|
Postoperative VAS a | |||
|---|---|---|---|---|---|
| 2 weeks | 1 month | 3 months | 6 months | ||
| Medicare | 0.99 (0.47 to 1.50) (<.001) | 0.46 (–0.06 to 0.99) (.086) | 0.52 (–0.10 to 1.13) (.098) | 0.94 (0.15 to 1.73) (.021) | 1.70 (–0.21 to 3.60) (.080) |
| Private | 0.51 (0.26 to 0.77) (<.001) | 0.38 (0.15 to 0.62) (.002) | 0.39 (0.11 to 0.66) (.007) | 0.79 (0.49 to 1.09) (<.001) | 0.50 (–0.23 to 1.229) (.169) |
| Uninsured | 0.79 (–1.10 to 2.68) (.409) | 1.35 (–0.49 to 3.20) (.149) | 0.51 (–1.65 to 2.66) (.640) | 1.70 (–0.21 to 3.60) (.080) | –0.240 (–9.36 to 8.83) (.951) |
Note. VAS = Visual Analogue Scale.
a
Beta value of multivariate linear regression with 95% confidence intervals in first set of parentheses followed by P-value. Unstandardized beta coefficient represents unit change in the outcome variable if the predictor variable is positive. For example, a significant coefficient of 0.79 for VAS-pain means that, on average, Medicaid is associated with an increase in pain of 0.79 units. Significant P-values shown in bold.