Fixed-effects modeling was performed to estimate summary effect measures, comparing tonsillotomy to tonsillectomy for the outcomes of secondary postoperative bleeding rate, and effects in resolving upper-airway obstructive symptoms, including PSG outcome, immune function (including IgA, IgG, and IgM), and rate of SDB recurrence in long-term follow-up. The gene discussed is CD79A; the disease is sleep apnea syndrome.