ABSTRACT

Table 2 illustrates the success and failure rates of UPPP for the treatment of SDB according to stage. Chi-square analysis demonstrates a highly significant relationship between stage and success of surgery. The Pearson chi-square ¼ 54.2, with two degrees of freedom, and a two-sided p < 0.0001. Successful treatment of SDB with UPPP was most likely achieved in stage I patients (80.6%) and least likely in stage III patients (8.1%).