Table 4 Magnitude of interactions in Analyses 2 and 3
From: Partial factorial trials: comparing methods for statistical analysis and economic evaluation
Analysis 2: inside-the-table analysis | Analysis 3: Bayesian bootstrapping | |
|---|---|---|
Comparison A: mobile versus fixed bearing | ||
Interaction for cost (SE) | –£2720 (£1751), p = 0.12 | –£2784 (£1790), p = 0.09 |
Interaction for QALYs (SE) | 0.90 (0.51), p = 0.08 | 0.89 (0.51), p = 0.08 |
Interaction for NMBa (SE) | £20,667 (£10,820), p = 0.06 | £20,672 (£11,029), p = 0.06 |
Comparison B: metal-backed versus all-polyethylene | ||
Interaction for cost (SE) | £506 (£907), p = 0.58 | £475 (£890), p = 0.58 |
Interaction for QALYs (SE) | 1.06 (0.54), p = 0.05 | 1.12 (0.53), p = 0.03 |
Interaction for NMBa (SE) | £20,788 (£11,094), p = 0.06 | £21,940 (£10,954), p = 0.05 |