Table 2.
Bivariate Correlations Among Study Variables
| 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. | 11. | 12. | 13. | 14. | 15. | 16. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Race (Black=1, White=0) | – | |||||||||||||||
| 2. Gender (Male=1; Female=0) | −.07 | – | ||||||||||||||
| 3. Age (T1) | .07 | .23 | – | |||||||||||||
| 4. Parents’ education (T1) | −.07 | −.02 | −.15 | – | ||||||||||||
| 5. Parents’ income (T1) | −.35 | −.03 | −.15 | .44 | – | |||||||||||
| 6. Perceived discrimination (T1) | .66 | −.15 | .12 | .04 | −.14 | – | ||||||||||
| 7. Depressive symptoms (T1) | .27 | −.07 | .10 | −.24 | −.33 | .19 | – | |||||||||
| 8. Self-rated health (T1) | −.13 | .25 | .01 | .20 | .15 | −.08 | −.21 | – | ||||||||
| 9. Body mass index (T1) | .21 | .01 | −.03 | −.12 | −.17 | .10 | .06 | −.15 | – | |||||||
| 10. Sleep Quality (T1) | −.09 | −.09 | −.07 | .03 | −.02 | −.07 | −.32 | .15 | −.02 | – | ||||||
| 11. Sleep Duration Problems (T1) | .27 | −.11 | −.02 | −.12 | −.08 | .20 | .30 | −.22 | .26 | −.37 | – | |||||
| 12. Sleep Latency (T1) | .13 | .06 | .09 | .05 | −.05 | .02 | .33 | −.01 | −.08 | −.34 | −.02 | – | ||||
| 13. Sleep Efficiency (T1) | −.04 | .12 | .02 | .14 | .08 | .03 | −.21 | .08 | .03 | .25 | −.28 | −.30 | – | |||
| 14. Sleep Quality (T2) | −.20 | .10 | −.13 | .14 | .09 | −.28 | −.28 | .10 | −.01 | .31 | −.26 | −.17 | .16 | – | ||
| 15. Sleep Duration Problems (T2) | .26 | −.06 | .08 | .06 | −.11 | .38 | .12 | −.08 | .08 | −.17 | .38 | −.05 | −.04 | −.38 | – | |
| 16. Sleep Latency (T2) | .20 | .03 | .06 | −.01 | −.11 | .31 | .20 | −.14 | −.11 | −.14 | .04 | .36 | .00 | −.37 | .30 | – |
| 17. Sleep Efficiency (T2) | −.14 | −.01 | −.15 | .08 | .15 | −.16 | −.24 | .08 | −.01 | .26 | −.24 | −.20 | .14 | .32 | −.48 | −.31 |
Note. Bivariate correlations greater than .17 are significant at p < .05.