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The computed total score consists of integer values ranging from 0 to 71. The classification system consists of 11 physiology measures based on a numeric rating scale 0 to 4 where 0 reflects values within the normal range and an increase in the numeric rating scale represents an increase in the abnormality of the physiology measure in either the high or low direction. For Serum Creatinine, the measure is assessed on the same scale but double points assigned for subjects with acute renal failure. The Glasgow Coma Score Scale (GCS) Score, evaluating extent of impaired consciousness/responsiveness, is reversed; so that lower scores indicate mild or no head injury or impairment and higher scores represent more severe head injury or impairment and range from 0 to 12. Chronological age is divided into age groups which are assigned values of 0, 2, 3, 5, 6. For patients with a history of severe organ system insufficiency or who are immunocompromised, a numeric rating of 2 or 5 is assigned for chronic health points, where 2 is assigned “for elective postoperative patients” and 5 is assigned “for nonoperative or emergency postoperative patients”. For subjects who do not have a history of severe organ system insufficiency or who are not immunocompromised, a NOT DONE record may be retained from the source RS domain with the conditional branching flag.

6     Example

6.1   Background

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