Skip to main content

Table 1 Baseline clinical and socio-demographic characteristics of the study participants

From: Circadian CLOCK gene polymorphisms in relation to sleep patterns and obesity in African Americans: findings from the Jackson heart study

Variables

 

Men (N = 1116)

Women (N = 1810)

 

Age (years)

 

53.67 ± 13.0

54.88 ± 12.71

0.0133

PEA

 

0.18 ± 0.09

0.17 ± 0.09

0.006

Annual household income

 

<$20,000-

19.14%

32.03%

<.0001

 

$20,000–50,000

34.16%

39.48%

 

>$50,000

46.71%

28.50%

Smoking status

 

Former/never smoker

82.04%

89.04%

<.0001

 

Current smoker

18%

10.96%

Alcohol consumption

 

Former/never drinker

40.63%

59.28%

<.0001

 

Current drinker

59.37%

40.72%

Leptin (ng/mL)

 

11.78 ± 11.17

38.54 ± 24.87

<.0001

Adiponectin (μg/mL)

 

4.07 ± 3.39

6.03 ± 4.48

<.0001

BMI (kg/m2)

 

30.03 ± 6.34

32.28 ± 7.80

<.0001

Normal-weight (BMI < 25)

 

17.38%

11.05%

<.0001

Overweight/Obese (BMI ≥ 25)

 

82.62%

88.95%

 

Sleep duration (hours)

 

6.31 ± 1.47

6.48 ± 1.49

0.0021

Sleep duration categories

 

Short (≤6 h)

23.98%

26.52%

0.09

 

Medium (6-8 h)

70.17%

69.09%

 

Long (>8 h)

5.86%

4.39%

Sleep quality

 

Poor

11.05%

9.14%

0.10

 

Fair

25.41%

22.94%

 
 

Good

31.82%

34.14%

 
 

Very good

23.15%

23.48%

 
 

Excellent

8.56%

10.30%

 
  1. Data presented as mean ± SD or as percentages. P-values are calculated based on one-way ANOVA for continuous variables and X2 test for categorical variables. BMI: body mass index; PEA; proportion of global European ancestry.