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Table 5 Severity and preventability of adverse events

From: Is detection of adverse events affected by record review methodology? an evaluation of the “Harvard Medical Practice Study” method and the “Global Trigger Tool”

Category of harm HMPS method

HMPS method after review stage 2

HMPS method after review stage 3

 

n(%) of AEs

n(%) of preventable AEs

n(%) of AEs

n(%) of preventable AEs

Minimal impairment, recovery within 1 month

116 (76.8)

104 (89.7)

120 (77.4)

108 (90.0)

Moderate impairment, recovery within 1 to 6 months

20 (13.2)

17 (85.0)

20 (12.9)

17 (85.0)

Moderate impairment, recovery within 6 to 12 months

9 (6.0)

6 (66.7)

9 (5.8)

6 (66.7)

Permanent impairment, degree of disability <50%

4 (2.6)

3 (75.0)

4 (2.6)

3 (75.0)

Permanent impairment, degree of disability >50%

1 (0.7)

1 (100.0)

1 (0.6)

1 (100.0)

Contributed to patient death

1 (0.7)

0 (0.0)

1 (0.6)

0 (0.0)

Unable to determine

0 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

Total n of AE

151 (100.0)

131 (86.8)

155 (100.0)

135 (87.1)

Category of harm GTT

GTT after review stage 2

GTT after review stage 3

 

n (%) of AEs

n (%) of preventable AEs

n (%) of AEs

n (%) of preventable AEs

E Contributed to or resulted in temporary harm to the patient and required intervention

51 (51.5)

41 (80.4)

78 (56.9)

63 (80.8)

F Contributed to or resulted in temporary harm to the patient and required initial or prolonged hospitalisation

42 (42.4)

31 (73.8)

51 (37.2)

40 (78.4)

G Contributed to or caused permanent patient harm

5 (5.1)

5 (100.0)

7 (5.1)

7 (100.0)

H Intervention required to sustain life

1 (1.0)

0 (0.0)

1 (0.7)

0 (0.0)

I Contributed to patient death

0 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

Total n of AE

99 (100.0)

77 (77.8)

137 (100.0)

110 (80.3)

  1. AE, adverse events; HMPS, “Harvard Medical Practice Study”; GTT, “Global Trigger Tool”.