Skip to main content

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
  1. aAt a £20,000/QALY ceiling ratio