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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: Sleep Health. 2018 Apr 14;4(3):258–264. doi: 10.1016/j.sleh.2018.03.002

Table 1.

Demographic and clinical characteristics of participants (N=252)

Category Mean (SD) or N (%) Min - Max
Age (years) 53.88 (14.17)

Gender
  Man 56 (22.2%)
  Woman 196 (77.8%)

Education level
  Hight School Graduate 126 (50.00%)
  College graduate 65 (25.79%)
  Graduate school or higher 61 (24.21%)

Employment status
  Working Full Time 123 (48.81%)
  Working Part Time 30 (11.90%)
  Unemployed 99 (39.29%)

Annual household income
  0-$19,999 38 (15.1%)
  $20,000-$39,999 49 (19.4%)
  $40,000-$59,999 38 (15.1%)
  $60,000-$79,999 32 (12.7%)
  $80,000-$99,999 27 (10.7%)
  More than $100,000 39 (15.5%)
  Refused/Don't Know 29 (11.5%)

Clinical factors
  Number of comorbidities 0.89 (0.88) 0.00 – 4.00
    CVD 114 (45.20%)
      - Hypertension 100 (39.70%)
      - Angina 22 (8.70%)
      - Heart attack 6 (2.40%)
      - Heart failure 7 (2.80%)
      - Stroke 3 (1.20%)
    Chronic lung disease 34 (13.49%)
    Diabetes 49 (19.40%)
    Depression 27 (10.70%)
  Body mass index (BMI) (kg/m2) 31.93 (6.48) 20.61 – 53.12
    BMI 18.5–24.9 (normal) 30 (11.9%)
    BMI 25.0–29.9 (overweight) 78 (31.0%)
    BMI 30.0–34.9 (class 1 obesity) 73 (29.0%)
    BMI 35.0–39.9 (class 2 obesity) 41 (16.2%)
    BMI >40.0 (class 3 obesity) 30 (11.9%)
  Waist-hip ratio 0.88 (0.09) 0.68 – 1.22
  Body fat (%) 40.79 (10.24) 12.80 – 59.50

NOTE. Cardiovascular disease (CVD)