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Table 2 Correlation coefficients between the main variables

From: Interaction of sleep quality and psychosocial stress on obesity in African Americans: the Cardiovascular Health Epidemiology Study (CHES)

  Global
Sleep
Quality
Sleep
Duration
(contin.)
Sleep
Latency
Sleeping
Medication
General
Perceived
Stress
Body
Mass
Index
Global Sleep Quality ****** -0.65*
<.0001§
0.70
<.0001
0.45
<.0001
0.36
<.0001
0.13
<.0001
Sleep Duration (continuous)   ****** -0.27
<.0001
-0.09
0.0006
-0.16
<.0001
-0.12
<.0001
Sleep Latency    ****** 0.29
<.0001
0.26
<.0001
0.04
0.17
Use of Sleeping Medication     ****** 0.18
<.0001
0.08
0.004
General Perceived Stress      ****** 0.08
0.002
  1. *Spearman correlation coefficient;
  2. §P-value for statistical significance;
  3. Considered continuously.