Table 3.
Non-inferiority of SAPT versus DAPT calculated across different thresholds of the hazard ratio
| Hazard ratio threshold | Wald χ2 | DF | Pr >χ2 |
|---|---|---|---|
| 1.1 | 2.1037 | 1 | 0.1469 |
| 1.2 | 3.0768 | 1 | 0.0794 |
| 1.3 | 4.1349 | 1 | 0.0420 |
| 1.4 | 5.2536 | 1 | 0.0219 |
| 1.5 | 6.4154 | 1 | 0.0113 |
| 1.66 | 8.3323 | 1 | 0.0039 |
Wald statistic was used to test the estimated parameter against a hypothetical population value. The Wald test was computed as the squared difference of the parameter estimate (B) against the hypothetical value divided by the standard error estimate. In a test for the global null hypothesis the parameter estimate was tested against a value of 0 (HR=1). The other tests tested whether the estimated parameter differs from 0.095 for a hazard ratio of 1.1, from 0.182 for a hazard ratio of 1.2 etc. The Wald test was performed using Proc PHREG in SAS 9.4.