Patient characteristics associated with in-hospital mortality in children following tracheotomy

Abstract

Objectives: To identify children at risk for in-hospital mortality following tracheotomy.

Design: Retrospective cohort study.

Setting: 25 746 876 US hospitalisations for children within the Kids' Inpatient Database 1997, 2000, 2003 and 2006.

Participants: 18 806 hospitalisations of children ages 0-18 years undergoing tracheotomy, identified from ICD-9-CM tracheotomy procedure codes.

Main outcome measure: Mortality during the initial hospitalisation when tracheotomy was performed in relation to patient demographic and clinical characteristics (neuromuscular impairment (NI), chronic lung disease, upper airway anomaly, prematurity, congenital heart disease, upper airway infection and trauma) identified with ICD-9-CM codes.

Results: Between 1997 and 2006, mortality following tracheotomy ranged from 7.7% to 8.5%. In each year, higher mortality was observed in children undergoing tracheotomy who were aged <1 year compared with children aged 1-4 years (mortality range: 10.2-13.1% vs 1.1-4.2%); in children with congenital heart disease, compared with children without congenital heart disease (13.1-18.7% vs 6.2-7.1%) and in children with prematurity, compared with children who were not premature (13.0-19.4% vs 6.8-7.3%). Lower mortality was observed in children with an upper airway anomaly compared with children without an upper airway anomaly (1.5-5.1% vs 9.1-10.3%). In 2006, the highest mortality (40.0%) was observed in premature children with NI and congenital heart disease, who did not have an upper airway anomaly.

Conclusions: Congenital heart disease, prematurity, the absence of an upper airway anomaly and age <1 year were characteristics associated with higher mortality in children following tracheotomy. These findings may assist provider communication with children and families regarding early prognosis following tracheotomy.

Figure 1

The bivariate OR (95% CI) of in-hospital mortality associated with each clinical characteristic from each year. The ORs represent the odds of mortality in the presence versus the absence of each characteristic.

Figure 2

In-hospital mortality for each node in the classification and regression tree (CART) partition analyses for tracheotomy operations performed in the year 2006. The p values indicate the significance of differences in mortality observed at each node.