Development of a clinical prediction model for an ordinal outcome: the World Health Organization Multicentre Study of Clinical Signs and Etiological agents of Pneumonia, Sepsis and Meningitis in Young Infants. WHO/ARI Young Infant Multicentre Study Group.

@article{Harrell1998DevelopmentOA,
  title={Development of a clinical prediction model for an ordinal outcome: the World Health Organization Multicentre Study of Clinical Signs and Etiological agents of Pneumonia, Sepsis and Meningitis in Young Infants. WHO/ARI Young Infant Multicentre Study Group.},
  author={Frank E. Harrell and Peter A. Margolis and Sandy Gove and Karen E. Mason and Edward Kim Mulholland and Deborah Lehmann and Lulu M. Muhe and Salvacion R. Gatchalian and Heinz F. Eichenwald},
  journal={Statistics in medicine},
  year={1998},
  volume={17 8},
  pages={
          909-44
        }
}
This paper describes the methodologies used to develop a prediction model to assist health workers in developing countries in facing one of the most difficult health problems in all parts of the world: the presentation of an acutely ill young infant. Statistical approaches for developing the clinical prediction model faced at least two major difficulties. First, the number of predictor variables, especially clinical signs and symptoms, is very large, necessitating the use of data reduction… 
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