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Updated: Nov 21, 2025
A Data-Driven Approach to Quantifying Immune States in Sepsis
Published on: February 7, 2025
Counting the cost of major infection and sepsis in New Zealand: an exploratory study using the National Minimum Data
Paul J Huggan1, Tania A Helms2, Veronique Gibbons3
1Senior Medical Officer, Waikato District Health Board; Honorary Lecturer, University of Auckland.
Aim:
To explore the population-at-risk and potential cost of a sepsis episode in New Zealand.
Method:
Retrospective analysis of the National Minimum Data Set using two code-based algorithms selecting (i) an inclusive cohort of hospitalised patients diagnosed with a 'major infection' with the potential to cause sepsis and (ii) a restricted subset of these patients with a high likelihood of clinical sepsis based on the presence of both a primary admission diagnosis of infection and at least one sepsis-associated organ failure.
Results:
In 2016, 24% of all inpatient episodes were associated with diagnosis of a major infection. The sepsis coding algorithm identified a subset of 1,868 discharges. The median (IQR) reimbursement associated with these episodes was $10,381 ($6,093-$10,964). In both groups, 30-day readmission was common (26.7% and 11% respectively).
Conclusions:
Infectious diseases with the potential to cause sepsis are common among hospital inpatients. Direct treatment costs are high for those who present with or progress to sepsis due to these infections.
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