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Table 2 Incidences of adverse drug events, medication errors and preventable adverse drug events

From: The epidemiology of adverse drug events and medication errors among psychiatric inpatients in Japan: the JADE study

Unit

n

Patient-days

ADEs

Incidencea

95 % CI

Crude rateb

95 % CI

Acute

341

16834

725

43.1

40.0–46.1

213

179–246

Nursing

75

4480

157

35.0

29.7–40.4

209

144–275

Medical

32

1419

73

51.4

40.0–62.9

228

88.6–368

Total

448

22733

955

42.0

39.4–44.6

213

184–243

Unit

n

Patient-days

Medication Errors

Incidencea

95 % CI

Crude rateb

95 % CI

Acute

341

16834

262

15.6

13.7–17.4

76.8

62.0–91.7

Nursing

75

4480

78

17.4

13.6–21.2

104

56.3–152

Medical

32

1419

58

40.9

30.6–51.2

181

73.4–289

Total

448

22733

398

17.5

15.8–19.2

88.8

72.9–105

Unit

n

Patient-days

Preventable ADEs

Incidencea

95 % CI

Crude rateb

95 % CI

Acute

341

16834

86

5.1

4.0–6.2

25.2

16.4–34.1

Nursing

75

4480

38

8.5

5.8–11.2

50.7

17.5–83.8

Medical

32

1419

42

29.6

20.8–38.4

131

35.9–227

Total

448

22733

166

7.3

6.2–8.4

37.1

25.8–48.3

  1. ADEs adverse drug events, CI confidence interval
  2. aPer 1000 patient-days
  3. bPer 100 admissions