The APACHE IV model is useful for benchmarking ICU length of stay for patient groups to assess unit efficiency, but has limited accuracy for individual patient predictions.
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Supports group-level APACHE IV use for ICU benchmarking; leaves open accurate individual length-of-stay prediction.
The APACHE IV model provides clinically useful ICU length of stay predictions for critically ill patient groups, but its accuracy and utility are limited for individual patients. APACHE IV benchmarks for ICU stay are useful for assessing the efficiency of unit throughput and support examination of structural, managerial, and patient factors that affect ICU stay.
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Zimmerman et al. (2006) studied this question.
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