Table 3.
Correlations of Between Cumulative GPA and Demographic, Academic, Psychological and Sleep Variables
| Variable | n | r | p |
|---|---|---|---|
| Demographic | |||
| Age | 867 | −.061 | .074 |
|
| |||
| Academic | |||
| High School GPA | 490 | .401 | <.001 |
| Standardized Test Scores | 720 | .286 | <.001 |
|
| |||
| Psychological | |||
| QIDS | 858 | −.072 | .034 |
| PSS | 845 | −.127 | <.001 |
| AUDIT | 848 | −.151 | <.001 |
| MPS | 852 | −.115 | .001 |
|
| |||
| Sleep | |||
| Bedtime | 867 | −.145 | <.001 |
| Wake time | 867 | −.134 | <.001 |
| TST | 867 | .017 | .625 |
| SE | 867 | .068 | .047 |
| SOL | 867 | −.056 | .102 |
| WASO | 867 | .041 | .228 |
| TWAK | 867 | −.064 | .058 |
| NAP | 867 | −.095 | .005 |
| Bedtime SD | 864 | −.151 | <.001 |
| Wake time SD | 866 | −.101 | .003 |
| TST SD | 866 | −.204 | <.001 |
| SE SD | 866 | −.104 | .002 |
| SOL SD | 866 | −.090 | .008 |
| WASO SD | 866 | .041 | .232 |
| TWAK SD | 866 | .047 | .170 |
| NAP SD | 866 | −.091 | .007 |
Note. QIDS = Quick Inventory of Depressive Symptomatology; PSS = Perceived Stress Scale; AUDIT = Alcohol Use Disorders Identification Test; MPS = Marijuana Problem Scale; TST = total sleep time; SE = sleep efficiency; SOL = sleep onset latency; WASO = wake time after sleep onset; TWAK = time awake after arising; NAP = naptime; SD = Standard Deviation.