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. 2021 Jul 20;44(11):zsab163. doi: 10.1093/sleep/zsab163

Table 2.

Pearson correlations among six sleep outcomes, the Jackson Heart Sleep Study N = 231

1 2 3 4 5 6 7 8
1. Self-reported sleep duration 1.00
2. Self-reported habitual sleep duration 1.00 ** 1.00
3. Self-reported sleep latency −0.40 ** −0.40 ** 1.00
4. Actigraphy-measured sleep duration 0.29 ** 0.29 ** −0.01 1.00
5. Actigraphy-measured sleep efficiency 0.06 0.06 0.05 0.47 ** 1.00
6. Actigraphy−measured WASO 0.05 0.05 −0.07 −0.10 −0.90 ** 1.00
7. Actigraphy-measured sleep midpoint −0.004 −0.005 0.08 −0.002 0.05 −0.07 1.00
8. Actigraphy-measured sleep latency −0.04 −0.04 −0.04 −0.22 ** −0.36 ** 0.24 ** −0.08 1.00

** p < 0.001.