3-RESULTS
We assessed 5643 patients for eligibility, and 5556 subjects were excluded because of mild bronchiolitis, no desaturation, comorbidity, and the presence of respiratory illness other than bronchiolitis. Of 472 eligible patients, 134 were missed opportunities, and 251 parents declined to participate in the study. Eighty-seven participants (48 in LFO vs. 39 in HFNCO) were included in the study. Ten patients in LFO therapy and one in HFNCO therapy (P = .02) needed an escalation of care at 4 h (Figure 1). Baseline demographic and clinical characteristics of patients were presented in Table 1.