Table 1.
Descriptive Statistics for Study Variables
| Mean (SD) or % | ||
|---|---|---|
| Sociodemographic | ||
| Age (year) | 72.63 (7.35) | |
| Sex (female) | 54% | |
| Race (African American) | 10% | |
| Race (Others or unknown) | 8% | |
| Race (white) | 82% | |
| Hispanic ethnicity (yes) | 10% | |
| Educationa | 2.68 (1.01) | |
| Personalityb | ||
| Neuroticism | 1.19 (.59) | |
| Extraversion | 2.17 (.57) | |
| Openness | 1.89 (.64) | |
| Agreeableness | 2.44 (.51) | |
| Conscientiousness | 2.33 (.55) | |
| Subjective sleep | ||
| Feel restedc | 2.49 (.79) | |
| Objective sleep | ||
| Assumed sleep (hours) | 7.86 (1.33) | |
| Actual sleep (hours) | 7.20 (1.26) | |
| Percent sleep | 91.74 (4.88) | |
| Wake after sleep onset (hours) | .65 (.40) | |
| Fragmentation | 14.68 (6.29) | |
| Time fell asleep (24 hour time) | 22.97 (1.39) | |
| Variation in time fell asleepd | .03 (.03) |
Note. N=620; n=618 for feel rested.
a
Education is on a scale from 1 (less than high school) to 4 (Bachelor’s degree or more).
b
Personality is scored on a scale from 1 (not at all) to 4 (a lot).
c
Feel rested is scored on a scale from 1 (rarely) to 4 (most of the time).
d
Variation in time fell asleep is the standard deviation divided by the mean across the up to three nights.