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. 2010 Aug 10;182(11):1173–1179. doi: 10.1503/cmaj.091430

Table 5.

Performance of nurses’ interpretation of the Canadian C-Spine Rule for 42 “clinically important” injury cases among 3633 patients

Nurses’ result with rule Cervical spine injury No cervical spine injury
Positive 37 1958
Negative 4 1535
Indeterminate* 1 98
Sensitivity, % (95% CI) 90.2 (76.0–95.0)
Specificity, % (95% CI) 43.9 (42.0–46.0)
Negative predictive value, % 99.7

Note: CI = confidence interval.

*

Data for rule were incomplete.