Table 1.
Distribution of Study Population by Sleep Duration and Carotid CIMT among Men
| Demographics | Overall (%) |
Mean Sleep Duration (hours) (SD) (N=260) |
P- value* |
Mean Carotid CIMT (mm) (SD) (N=260) |
P- value* |
|---|---|---|---|---|---|
| All male participants (N=260) | 5.8(1.1) | 0.74(0.13) | |||
| Age | |||||
| 37 – 41 years | 14.2 | 5.7(1.3) | 0.52 | 0.68(0.11) | <0.01 |
| 42 – 46 years | 30.8 | 5.7(1.2) | 0.74(0.11) | ||
| 47 – 52 years | 55.0 | 5.8(1.0) | 0.76(0.14) | ||
| Race | |||||
| Black | 36.5 | 5.2(1.1) | <0.01 | 0.75(0.12) | 0.32 |
| White | 63.5 | 6.1(0.9) | 0.73(0.14) | ||
| Education | |||||
| Less than high school degree | 7.0 | 5.1(1.3) | <0.01 | 0.79(0.10) | 0.01 |
| High school degree | 22.8 | 5.4(1.4) | 0.75(0.14) | ||
| Some college | 15.1 | 5.5(1.1) | 0.77(0.16) | ||
| College graduate | 55.2 | 6.1(0.9) | 0.72(0.12) | ||
| Covariates | |||||
| Body mass index | |||||
| ≥30 kg/m2 (obese) | 30.0 | 5.6(1.2) | 0.26 | 0.77(0.13) | <0.01 |
| 25 – 29.9 kg/m2(overweight) | 45.0 | 5.8(1.0) | 0.74(0.11) | ||
| <25 kg/m2(normal) | 25.0 | 5.8(1.2) | 0.70(0.15) | ||
| Waist circumference | |||||
| >90 cm | 63.9 | 5.8(1.1) | 0.53 | 0.76(0.12) | <0.01 |
| ≤90 cm | 36.2 | 5.7(1.2) | 0.71(0.14) | ||
| Systolic blood pressure | |||||
| >120 mmHg | 41.5 | 5.5(1.2) | <0.01 | 0.78(0.15) | <0.01 |
| ≤120 mmHg | 58.5 | 6.0(1.0) | 0.71(0.11) | ||
| Diastolic blood pressure | |||||
| >80 mmHg | 19.6 | 5.4(1.3) | <0.01 | 0.79(0.17) | <0.01 |
| ≤80 mmHg | 80.4 | 5.9(1.0) | 0.73(0.12) | ||
| High-density lipoprotein cholesterol | |||||
| <52 mg/dL (below median) | 70.7 | 5.8(1.1) | 0.67 | 0.74(0.13) | 0.53 |
| ≥52 mg/dL (above median) | 29.3 | 5.7(1.1) | 0.73(0.13) | ||
| Low-density lipoprotein cholesterol | |||||
| >109 mg/dL (above median) | 51.8 | 5.7(1.1) | 0.87 | 0.75(0.14) | 0.29 |
| ≤109 mg/dL (below median) | 48.2 | 5.8(1.1) | 0.73(0.12) | ||
| Diabetes | |||||
| Yes | 6.5 | 5.3(1.6) | 0.08 | 0.77(0.10) | 0.42 |
| No | 93.5 | 5.8(1.1) | 0.74(0.13) | ||
| Alcohol | |||||
| >7 drinks/week | 36.9 | 5.7(1.2) | 0.60 | 0.75(0.14) | 0.02 |
| 1–7 drinks/week | 42.8 | 5.9(0.9) | 0.74(0.14) | ||
| Non-drinker | 20.3 | 5.6(1.2) | 0.69(0.10) | ||
| Smoking | |||||
| Current smoker | 28.9 | 5.4(1.3) | 0.02 | 0.78(0.16) | 0.09 |
| Former smoker | 33.3 | 5.7(1.0) | 0.74(0.12) | ||
| Never smoker | 37.8 | 5.9(1.0) | 0.73(0.13) | ||
| Depression (mean CES-D) | |||||
| CES-D≥16 | 15.8 | 5.6(1.1) | <0.01 | 0.77(0.13) | 0.01 |
| CES-D<16 | 84.2 | 5.8(1.1) | 0.73(0.13) | ||
Abbreviations: CIMT, intima-media thickness
*
p-values reflect t-test or ANOVA test for those with 3 or more categories