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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.