The pattern of organ failure scores for patients in the ICU can be used to predict mortality.
Patterns of Change in Organ Failure Score (OFS)
Associated with Patient Death
Day in ICU
Findings
Pattern
Day 1
OFS > 35
high scorer
Day 2
AND
((OFS day 1 > 27),
(OFS day 1 <=35),
((OFS day 1) - (OFS day 2) < 2.5))
fuzzy bander
Subsequent
Day n
AND
(( OFS day n > 27)
((OFS day n) - (OFS day n-1) > 2.5))
leaper
gradual increase in OFS to > 35
creeper
where:
• increases in OFS are unexplained by surgery or major iatrogenic complications
Performance analysis at the Riyadh Intensive Care Program (Western Infirmary, Glasgow) showed that the mortality prediction algorithm has the a sensitivity equivalent to APACHE II (68%), but provides better specificity (95% vs 85%).
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