From: Study protocol: The back pain outcomes using longitudinal data (BOLD) registry
 | Index Case Prevalence | |||
---|---|---|---|---|
 | 2% | 3% | 5% | 10% |
Number of Cases | 100 | 150 | 250 | 500 |
Effect Size (D) | ||||
RDQ†| ||||
1.5 | - | - | 61% | 88% |
2.0 | - | 63% | 84% | 98% |
2.5 | 65% | 82% | 96% | 99% |
Pain NRS†| ||||
0.7 | - | 52% | 74% | 96% |
1.0 | 65% | 82% | 96% | 99% |
1.3 | 87% | 96% | 99% | 99% |
Incremental Cost per QALY Gain < $50,000††| ||||
$500 / 0.03 D QALY | - | - | - | 38% |
$500 / 0.06 D QALY | 45% | 61% | 82% | 98% |
$800 / 0.03 D QALY | - | - | - | 21% |
$800 / 0.06 D QALY | 36% | 51% | 72% | 95% |
Rare Events (Surgery, Complication, or Binary Event Rate)** | ||||
2% Incidence Rate | ||||
RR = 1.5 | - | - | - | - |
RR = 2.0 | - | - | - | 62% |
RR = 2.5 | - | - | 60% | 88% |
5% Incidence Rate | ||||
RR = 1.5 | - | - | - | 51% |
RR = 2.0 | - | 51% | 73% | 95% |
RR = 2.5 | - | 79% | 95% | 99% |