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Table 2 Summary results of the intervention for each outcome variable by group

From: Effectiveness of an educational intervention to improve the safety culture in primary care: a randomized trial

  Intervention Control  
At baseline At follow up At baseline At follow up Effect size
  n median (IQR) n median (IQR) n median (IQR) n median (IQR) median
Patient safety grade 52 3.00 (1.00) 44 3.00 (1.00) 45 3.00 (0.00) 36 3.00 (0.00) −0.04
  n (%) n (%) n (%) n (%) odds ratio (confidence interval)
N. events reported
 None 38 (74.51) 21 (46.67) 35 (76.09) 24 (68.57)  
 1 to 2 12 (23.53) 10 (22.22) 10 (21.74) 10 (28.57) 1.14 (0.39–3.35)
 3 or more 1 (1.96) 14 (31.11) 1 (2.17) 1 (2.86) 13.75 (2.41–354.37)