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. 2020 Jul 14;44(1):zsaa135. doi: 10.1093/sleep/zsaa135

Table 1.

Sample characterization

Men Women t- or z-values, P values
Sample, No. 15 11
Age, years 42.3 (9.7) 49.7 (7.2) t = 2.12, p = 0.043
Race
 Asian, No. 7 2
 White, No. 7 8
 More than one race, No. 1 1
Ethnicity
 Hispanic or Latino, No. 1 2
Habitual mood and sleep
 Depression, BDI-II total score 0.4 (0.9) 1.3 (2.7) z = 0.39, p = 0.697
 Anxiety, STAI-Y2 total score 25.9 (4.8) 28.3 (6.0) t = 1.13, p = 0.268
 Sleep quality, PSQI total score 1.6 (1.6) 1.9 (1.6) z = 0.88, p = 0.378
Resting BP*
 SBP, mmHg 116.4 (11.3) 102.5 (8.7) t = −3.40, p = 0.002
 DBP, mmHg 74.1 (6.2) 72.1 (5.6) t = −0.87, p = 0.395
Body composition
 BMI, kg × m−2 24.8 (3.0) 24.1 (4.3) t = −0.47, p = 0.640
  Normal (BMI: 18.5 to < 25), No. 11 7
  Overweight (BMI: 25 to < 30), No. 2 3
  Obese (BMI: 30 or higher), No. 2 1
 Body fat, % 19.1 (4.4) 30.6 (7.0) t = 5.13, p < 0.001
 Body water, % 56.0 (3.0) 48.1 (4.3) t = −5.47, p < 0.001
 Waist circumference, inches 35.7 (2.9) 31.9 (4.1) t = −2.70, p = 0.012
Health-Related Quality of Life (RAND-36)
 Physical functioning, score 98.7 (2.3) 99.0 (2.0) z = 0.34, p = 0.736
 Role limitations due to physical health, score 100.0 (0.0) 100.0 (0.0)
 Role limitations due to emotional problems, score 100.0 (0.0) 97.0 (10.0) z = −0.36, p = 0.716
 Energy/fatigue, score 78.0 (12.9) 77.3 (11.9) z = −0.08, p = 0.938
 Emotional well-being, score 88.3 (5.1) 89.8 (5.5) z = 0.83, p = 0.406
 Social functioning, score 100.0 (0.0) 97.7 (5.1) z = −0.75, p = 0.452
 Pain, score 98.0 (4.1) 92.3 (11.0) z = −1.22, p = 0.222
 General health, score 87.7 (11.5) 85.0 (9.2) z = −0.60, p = 0.551
Physical activity
 IPAQ Low activity level, No. 0 1
 IPAQ Moderate activity level, No. 8 3
 IPAQ High activity level, No. 7 7
Habitual alcohol consumption, No. standard drinks/week over the past month 5.0 (3.2) 3.5 (2.4) z = −1.06, p = 0.287
Current smokers, No. 2 0

Mean and standard deviation (SD), t- or z- (for not-normally distributed variables) values and associated probability, or frequency of observations are reported, comparing men and women. BDI, Beck Depression Inventory; BMI, body mass index (calculated as weight[kg]/height[m2]; BMI categories were defined according to the definition of the Centers for Disease Control and Prevention: https://www.cdc.gov/obesity/adult/defining.html); IPAQ, Physical Activity Questionnaires; PSQI, Pittsburgh Sleep Quality Index; STAI, State-Trait Anxiety Inventory.

*Automatic upper arm sphygmomanometer BP (SBP, DBP) measurements were taken three consecutive times after a 5 min resting period, while participants were sitting in a chair. The first reading was discharged, and the final value was obtained by averaging the other two measurements.

RAND-36 outcomes are expressed in scores ranging from 0 to 100 across the 8 health domains, with lower scores indicating more disability.