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Table 2 The number of knee arthroscopy pre- and post- intervention at intervention and control hospitals (public only)

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

Policy   Intervention 1 Control 1 Intervention 2 Control 2 Intervention 3 Control 3 Intervention 4 Control 4 All interventions (n = 4) All control (n = 16)
Beforea Sum 102 415 595 2080 410 1539 142 612 1249 4646
Average 102 104 595 520 410 385 142 153 312 290
After Sum 53 349 138 1181 133 1040 40 371 364 2941
Average 53 87 138 295 133 260 40 93 91 184
Follow up Period (months) 45 45 45 45 45 45 33 33 39 39
  1. aBoth Intervention and control hospitals have 5 year pre intervention data; the number of knee arthroscopy are rounded