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Pearson Correlations Between Sleep Measures and Relevant Variables
| PSQI Global Score | ESS Total Score | |
| ESS total | .13 | — |
| Daytime napping | .07 | .10 |
| Wake after sleep onset | .18 | .07 |
| 15-item GDS | .34 | .17 |
| Mobility/IADL | .23 | .11 |
| SF-12 mental | −.30 | −.12 |
| SF-12 physical | −.31 | −.17 |
Note: N ranges from 2,948 to 3,055. All p values < .001. ESS = Epworth Sleepiness Scale; GDS = Geriatric Depression Scale; IADL = instrumental activity of daily living; PSQI = Pittsburgh Sleep Quality Index.
