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Table 2 Operations on trial patients and non-randomised patients

From: Non-randomised patients in a cholecystectomy trial: characteristics, procedures, and outcomes

   OC LC MC CBDE Shunt Concomitant operation
  n N % n % n % n % n % N %
Trial patients 724 0   362 50.0 362 50.0 39 5.4 0   20 2.8
Non-randomised patients 993 520 52.4 319 32.1 154 15.5 201 20.2 15 1.5 69 6.9
         p < 0.001 p < 0.001 P < 0.001
  1. OC = conventional open cholecystectomy, LC = Laparoscopic cholecystectomy, MC = mini-laparotomy cholecystectomy, CBDE = common bile duct exploration, Shunt = choledochoduodenostomy, Concomitant operation = other operation performed in combination with cholecystectomy.