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In addition, due to the model transparency, these two variables can be excluded from the implemented version of the score with little impact to its predictive ability.
Moreover, the AAM is not being employed in isolation: its use is integrated with a clinical response arm as well as protocols that include explicit mechanisms for eliciting and respecting patient preferences with respect to escalation of care. Transfers to ICU criteria vary across facilities as they depend on the availability of beds and local practices. Our modeling data structure had one observation per patient per hour, until a length of stay of 15 days was reached and thus allowed us to obtain hourly probability estimates but has some limitations.
The resultant dataset can potentially repeat the same vital sign or lab values from one to three days, or until new measurements are taken.