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Table 3 Model estimations of reduction in knee arthroscopy in intervention hospitals (vs. control hospitalsa, public only)

From: A controlled before-after study to evaluate the effect of a clinician led policy to reduce knee arthroscopy in NSW

  Point estimates 95% CI p-value Incidence rate ratio
Intervention 0.08 −0.23 0.38 0.630  
Time −0.13 −0.40 0.13 0.323  
Intervention a Time −0.82 −1.52 −0.12 0.022 0.44 (0.21–0.89)
  1. aControl hospitals were matched by volume of knee arthroscopy, and one intervention matches with four controls