Table 3.
Results of Multiple Linear Regression Testing Psychological Attributes' Associations with Sleep-Wake Mean Arterial Pressure (MAP) Ratios
| Variable | Base Model |
Negative |
Positive |
|||
|---|---|---|---|---|---|---|
| β | p | β | p | β | p | |
| Age | .05 | .44 | ||||
| Sex (1=male; 0=female) | .12 | .07 | ||||
| Race (1=White; 0=Black) | −.06 | .40 | ||||
| Body Mass Index | .03 | .68 | ||||
| Hypertension Status (1=yes; 0nNo) | .19 | .007 | ||||
| Negative Psychological Attributes a | ||||||
| CES-D Depression | .09 | .16 | ||||
| STAI Anxiety | .13 | .06 | ||||
| CM Hostility | .15 | .03 | ||||
| Positive Psychological Attributes b | ||||||
| LOT Optimism | −.08 | .22 | ||||
| LET Purpose | −.18 | .009 | ||||
Regression coefficients are presented for depression, anxiety, and hostility scores when they were entered into separate linear regression models. When the three scores were entered simultaneously into one model, hostility remained associated with sleep-wake MAP ratios (β = .15, p = .04).
Regression coefficients are presented for optimism and life purpose scores when they were entered into two separate linear regression models. When they were included in the same model, life purpose remained associated with sleep-wake MAP ratios (β = −.17, p = .03).
Note. CES-D = Center for Epidemiological Studies Depression Scale, minus the sleep item; STAI = Spielberger Trait Anxiety Inventory; CM = Cook-Medley Hostility Scale; LOT = Revised Life Orientation Test; LET = Life Engagement Test