Table 3

Comparison of bedside nurse and researcher (RA-1) delirium ratings at Time 1

T1 (N = 151)


RA-1 rating1


Nurse rating

Delirium

No delirium


Delirium

14

3

No delirium

94

40

Sensitivity2 [95% CI] : 13.0% [7.3–20.8]

Specificity3 [95% CI] : 93.0% [80.9–98.5]

Positive predictive value4 [95% CI] : 82.4% [56.6–96.2]

Negative predictive value 5 [95% CI] : 29.9% [22.3–38.4]


1 Research assistant rating of probable delirium, assessed with the CAM, was used as the reference standard.

2 Indicates how often nurses detected delirium when it was present (true positive rate).

3 Indicates how often nurses rated delirium as absent when it was not present (true-negative rate).

4 Indicates how often delirium was present when delirium was detected by nurses.

5 Indicates how often delirium was absent when delirium was not detected by nurses.

Voyer et al. BMC Nursing 2008 7:4   doi:10.1186/1472-6955-7-4

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