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Table 7 Clustering among patients of adverse occurrences reviewed independently by all four reviewers.1

From: Towards standardized measurement of adverse events in spine surgery: conceptual model and pilot evaluation

1

adverse occurrence in

22

patients

2

adverse occurrences in

9

patients

3

adverse occurrences in

7

patients

4

adverse occurrences in

6

patients

5

adverse occurrences in

5

patients

6

adverse occurrences in

1

patient

7

adverse occurrences in

1

patient

9

adverse occurrences in

2

patients

Total

141

adverse occurrences in

53

patients

  1. 1 Among the patients with an adverse occurrence, more than half (31/53) experienced multiple events. This clustering made cause, effect, and preventability judgments on individual events difficult.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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