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Table 3 Variable importance ranking for the models used in the analysis of WHO-defined non-severe pneumonia

From: An exploration of mortality risk factors in non-severe pneumonia in children using clinical data from Kenya

Model Logistic PLS-DA Random forest Elastic net Linear SVM Mean rank (SD)
Feature importance rank Respiratory rate ≥ 70 breaths/min 3 1 1 2 3 2 (0.89)
Age < 12 months * Respiratory rate ≥ 70 2 2 8 8 2 4.4 (2.94)
Age < 12 months 1 3 7 11 1 4.6 (3.88)
Very low WAZ 7 5 3 6 7 5.6 (1.5)
Presence of comorbidity 5 4 6 10 5 6 (2.1)
Female 6 7 2 9 6 6 (2.28)
Mild/moderate pallor 8 9 4 3 8 6.4 (2.42)
Temperature > 39 °C 4 13 10 - 4 7.75 (3.9)
Severe pallor 13 8 5 1 13 8 (4.65)
Malaria endemic 12 6 9 13 12 10.4 (2.58)
Malaria endemic * Mild/moderate pallor 11 14 16 4 11 11.2 (4.07)
Comorbidity * Very low WAZ 10 12 13 - 10 11.25 (1.3)
Non-severe malaria 16 10 11 7 16 12 (3.52)
Some dehydration 9 15 18 15 9 13.2 (3.6)
Low WAZ 14 16 12 - 14 14 (1.41)
Comorbidity * Low WAZ 17 17 15 5 17 14.2 (4.66)
Malaria endemic * Non-severe malaria 18 11 14 12 18 14.6 (2.94)
Malaria endemic * Severe pallor 15 18 17 14 15 15.8 (1.47)
  1. Variables with (*) are interaction terms, i.e. variables used to test whether the effect of one independent variable differed depending on the level of the other independent variable
  2. SD standard deviation