• Chastity Greene, Hui Nian, Yuwei Zhu, James W Antoon, Katherine L Freundlich, Krow Ampofo, Laura F Sartori, Jakobi Johnson, Donald H Arnold, Per Gesteland, Justine Stassun, Jeff Robison, Andrew T Pavia, Carlos G Grijalva, and Derek J Williams.
• Meharry Medical College, Nashville, Tennessee, USA.
• J Hosp Med. 2022 Jul 1; 17 (7): 527533527-533.

BackgroundUnderlying comorbidities are common in children with pneumonia.ObjectiveTo determine associations between comorbidity-related functional limitations and risk for severe pneumonia outcomes.Design, Setting, And ParticipantsWe prospectively enrolled children <18 years with and without comorbidities presenting to the emergency department with clinical and radiographic pneumonia at two institutions. Comorbidities included chronic conditions requiring daily medications, frequent healthcare visits, or which limited age-appropriate activities. Among children with comorbidities, functional limitations were defined as none or mild, moderate, and severe.Main Outcomes And MeasuresOutcomes included an ordinal severity outcome, categorized as very severe (mechanical ventilation, shock, or death), severe (intensive care without very severe features), moderate (hospitalization without severe features), or mild (discharged home), and length of stay (LOS). Multivariable ordinal logistic regression was used to examine associations between comorbidity-related functional limitations and outcomes, while accounting for relevant covariates.ResultsA cohort of 1116 children, including 452 (40.5%) with comorbidities; 200 (44.2%) had none or mild functional limitations, 93 (20.6%) moderate, and 159 (35.2%) had severe limitations. In multivariable analysis, comorbidity-related functional limitations were associated with the ordinal severity outcome and LOS (p < .001 for both). Children with severe functional limitations had tripling of the odds of a more severe ordinal (adjusted odds ratio [aOR]: 3.01, 95% confidence interval [2.05, 4.43]) and quadrupling of the odds for longer LOS (aOR: 4.72 [3.33, 6.70]) as compared to children without comorbidities.ConclusionComorbidity-related functional limitations are important predictors of disease outcomes in children with pneumonia. Consideration of functional limitations, rather than the presence of comorbidity alone, is critical when assessing risk of severe outcomes.© 2022 Society of Hospital Medicine.

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