Mood Predicts Response to Placebo CPAP

Table 3

Prediction of change in AHI (hierarchical regression analysis).

Variable	B	SE B	𝛽	𝑅^2	Adjusted 𝑅^2	𝐹	𝑃
Step  1				.036	−.006	.853	.365
Study*	6.233	6.7	.189				.365
Step  2				.098	.016	1.198	.321
Study	13.102	8.691	.397				.146
Pre-CPAP AHI	−.185	.150	−.325				.230
Step  3				.434	.353	5.361	.007
Study	2.270	7.689	.069				.771
Pre-CPAP AHI	−.012	.131	−.021				.929
Baseline POMS-Total	−.342	.097	−.639				.002

*“Study” is a dummy variable indicating from which protocol the subject was drawn.