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. 2020 Aug 8;44(1):zsaa146. doi: 10.1093/sleep/zsaa146

Table 1.

Demographics of the sample (n = 974 participants) included in the study

Mean ± standard deviation
Age (years) 28.7 ± 3.7
Sex (M/F) 444/530
Education (years) 14.9 ± 1.8
Body mass index 26.4 ± 5.2
Systolic blood pressure (mmHg) 123.7 ± 13.9
Diastolic blood Pressure (mmHg) 76.7 ± 10.6
Race (%) Asian/Natural Hawaiian/Other Pacific Islands: 5.6%
Black or Afrin American: 15.1%
White: 75.1%
More than one: 2.5%
Unknown or not reported: 1.5%
Ethnicity (%) Hispanic/Latino: 8.8%
Not Hispanic/Latino: 90.1%
Unknown or not reported: 1%
Handedness (%) Right-handed: 88.1%
Left-handed: 7%
Mixed: 5%