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Table 1 In-patient characteristics by occurrence of Adverse Drug Events (ADEs) at a Brazilian hospital

From: Adverse drug events identified by triggers at a teaching hospital in Brazil

   Variable Without ADE With ADE Total P-valuea
N (%) N (%) N (%)
Total 205 35 240 -
Age in years 50.6 (19.8) 51.6 (21.4) 50.8 (20.0) 0.788
  Mean (standard deviation)
Sex     
  Female 71 (81.6) 16 (18.4) 87 (36.2) 0.208
  Male 134 (87.6) 19 (12.4) 153 (63.8)
Nature of the admission     
  Urgency/emergency 162 (84.8) 29 (15.2) 191 (79.6) 0.603
  Elective 43 (87.8) 6 (12.2) 49 (20.4)
Type of treatment     0.09
  Surgical 131 (88.5) 17 (11.5) 148 (61.7)
  Clinical 74 (80.4) 18 (19.6) 92 (38.3)
Status of discharge     
  Discharged/transferred 195 (85.9) 32 (14.1) 227 (94.6) 0.290
  Death 10 (76.9) 3 (23.1) 13 (5.4)
ICU     
  Yes 11 (84.6) 2 (15.4) 13 (15.4) 0.933
  No 194 (85.5) 33 (14.5) 225 (94.6)
Length of stay b     
  ≤ 10 days 164 (91.1) 16 (8.9) 180 (75.0) <0.001
  > 10 days 41 (68.3) 19 (31.1) 60 (25.0)
Cost of hospitalisation c     
  Low 73 (90.1) 8 (9.9) 81 (33.8) 0.331
  Medium 66 (82.5) 14 (17.5) 80 (33.8)
  High 66 (83.5) 13 (16.5) 79 (32.9)
Charlson index     
  0 126 (87.5) 18 (12.5) 144 (60.0) 0.084
  1-2 55 (87.3) 8 (12.7) 63 (26.3)
  3-9 24 (72.7) 9 (27.3) 33 (13.8)
Number of drugs     
  1-9 117 (94.4) 7 (5.6) 124 (48.3) <0.001
  10 or more 88 (75.9) 28 (24.1) 116 (51.7)
Total 205 35 240 -
  1. aUsing T-Student for comparing mean ages, Chi-square and Fisher’s Exact tests for comparing categorical variables.
  2. bCut-off by mean (10.0).
  3. cCategorised in tertiles.