Overall response to treatment
Response to treatment was evaluated as a secondary outcome. If the preoperative AHI > 5 events/hr then response was defined as post-operative AHI < 5 and/or a 50% reduction in AHI. Patients with a preoperative AHI of < 5 were considered responders if postoperative AHI was <1 which is considered surgical cure. All seven studies (283 patients) were included in this analysis with a M ± SD of 70.0 +/- 17.0% [95% CI 67.6, 71.6], and non-response rate of 30.0 ± 17.0% [95% CI 28.4, 32.4] (Table 2).