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Table 2 Diagram demonstrating the performance metrics of the Danish drowning formula from 2016–2021

From: The Danish Drowning Cohort: Utstein-style data from fatal and non-fatal drowning incidents in Denmark

Total population

N = 3,471,681

Danish Drowning Formula

Danish Drowning Formula as a drowning identification tool

Drowning

Non-drowning

Actual condition

Drowning

TP

(n = 1,227)

FN

(n = 0)

Sensitivity = 100%

Non-drowning

FP

(n = 64,544)

TN

(n = 3,405,910)

Specificity = 98%

The Danish Drowning Formula test result

PPV = 1.87%

NPV = 100%

 
  1. The performance metrics of the Danish Drowning Formula applied to the Danish Prehospital Electronic Medical Record from 2016–2021 on unrestricted terms
  2. Abbreviations: FN False Negative, FP False Positive, NPV Negative Predictive Value, PPV Positive Predictive Value, TN True Negative, TP True Positive
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BMC Medical Research Methodology

ISSN: 1471-2288

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