Question 1

How does MODS differ from SOFA?

Accepted Answer

Both measure 6 organ systems. Key differences: MODS uses the Pressure-Adjusted Heart Rate for CV while SOFA uses MAP and vasopressor dose. The two scores perform similarly for mortality prediction.

Question 2

How should I handle missing data for a component?

Accepted Answer

Use the last measured value if the patient is stable, or assume a score of 0 for that system if no data are available for the 24-hour window.

Question 3

Can MODS be used retrospectively?

Accepted Answer

Yes — MODS can be calculated from chart review using the worst values recorded each day. Inter-observer reliability is good with clear data extraction rules.

Question 4

What is the clinical relevance of a rising MODS score?

Accepted Answer

A rising MODS over consecutive days indicates progressive organ failure. Death from critical illness is almost always preceded by rising MODS scores.