Table 2 correlation matrix (n = 12,589).

From: Mediating role of depressive symptoms on the relationship between sleep duration and cognitive function

Variables

Mean

SD

Sleep duration

CES-D

Cognitive function

Sleep duration

6.4

1.8

1

  

CES-D

9.8

4.7

− 0.24**

1

 

Cognitive function

8.1

2.8

0.03**

− 0.13**

1

Effect size

0.03

  1. SD standard deviation, CES-D the Center for Epidemiologic Studies Depression Scale.
  2. All the analysis controlled for age, gender, education, marital status, residency, smoking, drinking, BMI, hypertension, dyslipidemia, and diabetes or high blood sugar.
  3. **p < 0.01, *p < 0.05.
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