In hospitalized children with human rhinovirus infection, lower airway obstruction and specific comorbidities associate with progression to bronchitis or pneumonia.

A retrospective cohort study analyzed data from 1,125 hospitalized children diagnosed with human rhinovirus infection at the First Affiliated Hospital of Ningbo University. The primary objective was to evaluate risk factors associated with the progression of the infection to bronchitis or pneumonia. The study population consisted of children admitted to the hospital setting, with outcomes assessed based on clinical progression during their stay.

Regarding progression to bronchitis, the analysis revealed a positive association with lower airway obstruction. Children presenting with dyspnea had an odds ratio (OR) of 4.35 (95% CI: 2.35–8.06), wheezing on auscultation had an OR of 2.98 (95% CI: 1.89–4.69), and cough had an OR of 2.61 (95% CI: 1.52–4.49). Approximately 29% of the 1,125 children in the cohort experienced progression to bronchitis.

Progression to pneumonia was linked to prior antibiotic use, viral co-infection, and coagulation abnormalities. The odds ratios were 2.09 (95% CI: 1.34–3.25) for prior antibiotic use, 1.97 (95% CI: 1.25–3.10) for viral co-infection, and 1.04 (95% CI: 1.00–1.08) for coagulation abnormalities. Overall, 59% of the children progressed to pneumonia. Elevated IgM levels were identified as a common risk factor for progression to either condition, though specific effect sizes and absolute numbers for this factor were not reported. Conversely, older age demonstrated a protective effect against progression, with an OR of 0.89 (95% CI: 0.83–0.96).

The study did not report specific adverse events, discontinuations, or tolerability data. Key limitations inherent to the retrospective design and the absence of reported effect sizes for certain variables such as IgM levels must be considered. While the practice relevance suggests improving early risk stratification and guiding targeted interventions, clinicians should interpret these associations cautiously. The evidence is observational, meaning causal relationships cannot be established, and the findings may not be generalizable beyond the specific hospital setting.