[Performance of the Pediatric Index of Mortality 2 in a pediatric intensive care unit].
OBJECTIVE
To assess the discrimination and calibration of the Pediatric Index of Mortality 2 in patients admitted to a pediatric intensive care unit.


METHODS
The study was conducted with a contemporary cohort from November 2005 to November 2006. Patients aged 29 days to 18 years were included in the study. Patients who died within 12 hours of admission and cases of readmission were excluded from the study. The performance of the Pediatric Index of Mortality 2 was assessed by means of the Hosmer-Lemeshow goodness-of-fit test, the standardized mortality ratio and the area under receiver operating characteristic (ROC) curve with 95% confidence interval. The significance level was established as 5%.


RESULTS
A total of 276 admissions to the pediatric intensive care unit were included in the analysis. The mortality rate was 14.13%, and the efficiency of admission 0.88%. The median age of the sample was 42.22 months, and most participants were male (60.1%). Most admissions were referrals from the emergency department. The mean duration of stay in pediatric intensive care unit was 6.43±5.23 days. Approximately 72.46% of admissions were for clinical reasons and exhibited an association with the outcome death (odds ratio: 2.9; 95%CI: 1.09-7.74; p=0.017). Calibration of the Pediatric Index of Mortality 2 with the chi-square statistic was 12.2686 (p=0.1396) in the Hosmer-Lemeshow goodness-of-fit test, and the standardized mortality ratio was 1.0. The area under the ROC curve assessing model discrimination was 0.778.


CONCLUSIONS
Pediatric Index of Mortality 2 exhibited satisfactory performance.
Unidade de Cuidados Intensivos Pediátricos e Neonatologia, Hospital Infantil Nossa Senhora da Glória, Secretaria Estadual de Saúde do Espírito Santo, Vitória, ES, Brasil.
Antônio Lima
AL
Netto
Unidade de Cuidados Intensivos Pediátricos e Neonatologia, Hospital Infantil Nossa Senhora da Glória, Secretaria Estadual de Saúde do Espírito Santo, Vitória, ES, Brasil.
Virginia Maria
VM
Muniz
Departamento de Estatística, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil.
Eliana
E
Zandonade
Departamento de Enfermagem, Centro Biomédico, Vitória, Vitória, ES, Brasil.
Ethel Leonor Noia
EL
Maciel
Unidade de Cuidados Intensivos Pediátricos e Neonatologia, Hospital Infantil Nossa Senhora da Glória, Secretaria Estadual de Saúde do Espírito Santo, Vitória, ES, Brasil.
Rodrigo Nichio
RN
Bortolozzo
Unidade de Cuidados Intensivos Pediátricos e Neonatologia, Hospital Infantil Nossa Senhora da Glória, Secretaria Estadual de Saúde do Espírito Santo, Vitória, ES, Brasil.
Nélio Ferreira
NF
Costa
Unidade de Cuidados Intensivos Pediátricos e Neonatologia, Hospital Infantil Nossa Senhora da Glória, Secretaria Estadual de Saúde do Espírito Santo, Vitória, ES, Brasil.
Rosane da Silva de Araujo
Rda S
Limongi
D000293:Adolescent; D002138:Calibration; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D015278:Intensive Care Units, Pediatric / Q000706:statistics & numerical data*; D007902:Length of Stay; D008297:Male; D011446:Prospective Studies; D012372:ROC Curve; D018570:Risk Assessment / Q000379:methods; D012720:Severity of Illness Index