Short CAM — Short-form Confusion Assessment Method

What this tool is and how to interpret its evidence

Short CAM is the compact four-feature form within the original Confusion Assessment Method family. It is not a new instrument created by the 2019 nursing study currently cited in the catalogue. CAM dates to 1990, and the short form records the core feature ratings after an appropriate interview and cognitive assessment. Administration time therefore includes the assessment that generates the observations; it is not simply the time needed to tick four boxes.

The CAM family has a large evidence base, but performance depends on training, the quality of the supporting assessment and how the method is embedded in practice. Heinrich and colleagues' 2019 head-to-head nursing implementation study found very low sensitivity for Short CAM in that particular bedside workflow while specificity remained high. That result is important implementation evidence, not the original validation and not a universal estimate of CAM-family accuracy.

The record should be a version page linked to the main CAM family and excluded from an independent-family count. Because the authorised CAM materials restrict reproduction, this page should not restate the feature wording, scoring decision rule or assessment prompts. It can explain the short form's place in the family, need for a supporting assessment, approximate timing and the contrast between research and routine-use performance. Readers should be directed to the authorised CAM instrument hub for current forms and permissions.