Table 3. Regression (final step) of the Pittsburgh Sleep Quality Index–Global on flow-mediated dilation (n=97): poorer subjective sleep quality correlated with poorer vasodilation.
| Predictors | ΔR2 | ΔF | ΔF p value | B (SE) | Standard Beta | Beta p value |
|---|---|---|---|---|---|---|
| Step 1: Covariates | .25 | 3.72 | .001 | |||
| a) Sex | .160(.04) | 0.39 | .000 | |||
| b) Age | .004(.00) | 0.21 | .047 | |||
| c) Race | -.056(.02) | −0.26 | .012 | |||
| d) Hypertension | .107(.07) | 0.17 | .115 | |||
| e) Body Mass Index | -.010(.01) | −0.20 | .096 | |||
| f) Apnea-hypopnea Index | -.002(.00) | −0.06 | .507 | |||
| g) Income | .043(.05) | 0.08 | .405 | |||
| h) Current Smoker | −.010(.07) | −0.01 | .883 | |||
| Step 2: Pittsburgh Sleep Quality Index–Global | .04 | 5.26 | .024* | −.164(.07) | −0.22 | 024* |