Objectives:To determine if shared decision-making tools (SDMTs) improve clinical outcomes for these children. Shared decision making (SDM) is a collaborative process in which patients and clinicians jointly establish treatment plans that integrate clinical evidence and patient values/preferences. We previously reported less decisional conflict using a SDMT for families of children with obstructive sleep apnea (OSA) without tonsillar hypertrophyl; however, the clinical impact of this finding is unknown.Methods: Prospective single-blind randomized controlled trial for consecutive patients referred to a multidisciplinary upper airway center. The study group used a SDMT, whereas the control group did not; all were followed until their next appointment and polysomnogram.Results: We assessed 50 families (24 study, 26 controls); mean age of patients was 8.8 (95% confidence interval 6.9-10.6) years, and 44% were female. After their initial visit, there was agreement between families and providers on the best treatment option for 22 of 24 (91.7%) study patients and 12 of 26 (46.2%) controls (P < 0.001). Before the first follow-up, four control families (15.4%) modified their treatment plan, whereas none of the study families did so (P = 0.04). Continuous positive airway pressure (CPAP) compliance was 27% (3 of 11) for controls and 57% (5 of 8) for study patients (P = 0.11). The median obstructive apnea-hypopnea index significantly improved in study patients from 13.4 (range, 20.0-57.2) to 3.5 (range 0.4-45.5, P = 0.01] events per hour, but not in controls, with 9.4 (range, 0.9-76.2) to 4.9 (range, 0-116, P = 0.10) events per hour.Conclusion: Families of children with OSA without tonsillar hypertrophy who were counseled regarding treatment options using SMDTs were more likely to undergo agreed upon treatment and had higher CPAP compliance.