Multivariate regression identified CPAP pressure ( odds ratio [ 95 % confidence interval ] 0.53 [ 0.33-0 .87 ] , age ( 0.93 [ 0.87-0 .99 ] ) and AHI ( 0.92 [ 0.86-0 .97 ] ) as predictors of MAS treatment response ( model r ( 2 ) = 0.54 , p < 0.001 ) .