COMBI >> Scales >> CNC >> Properties


Tamara Bushnik, PhD, Santa Clara Valley Medical Center at

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Rappaport, M. (2000). The Coma/Near Coma Scale. The Center for Outcome Measurement in Brain Injury.
combi/cnc ( accessed ).





CNC Properties

Independent interrater reliability calculated at three time periods was calculated at 0.97. Interrater intercorrelations were quite high, with the lowest correlation being 0.86 (item 8, nasal swab). Inter-item correlations were obtained including the alpha coefficient. Alpha coefficients were 0.43, 0.65, and 0.65 for CNC scores done at 1, 8, and 16 weeks post injury (Rappaport, 1992).

A rank order correlation between CNC and DRS scores was 0.69 (p<.02). The correlation between CNC and the degree of abnormality of the multisensory (auditory, visual, and somatosensory) evoked potential patterns (MEPA- Mean Evoked Potential Abnormality) was 0.52 (p<.05) (Rappaport, 1992).


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