Table 1.
Baseline Patient Characteristics With Respect to Different Sleep‐Duration Groups
| Sleep Duration <6 Hours | Sleep Duration 6 to 8 Hours | Sleep Duration >8 Hours | P Value | |
|---|---|---|---|---|
| No. of patients | 599 | 2282 | 138 | NA |
| Age, y | 60.6 ± 9.8 | 61.0 ± 9.6 | 64.9 ± 10.1 | <0.001a |
| Male sex | 297 (49.6) | 1009 (44.2) | 69 (49.8) | 0.451 |
| Smokers | 150 (25) | 437 (19.1) | 23 (16.7) | <0.001a, b |
| BMI, kg/m2 | 30.1 ± 7.1 | 29.3 ± 6.4 | 29.4 ± 5.0 | 0.202b |
| TC, mg/dL | 203.3 ± 44.2 | 201.5 ± 42.1 | 200.43 ± 46.3 | 0.506 |
| SBP, mm Hg | 131.6 ± 19.7 | 130.6 ± 20.0 | 133.0 ± 24.9 | 0.556 |
| Ethnicity | ||||
| Mexican American | 72 (12.0) | 358 (15.7) | 26 (18.8) | 0.031a |
| Other Hispanic | 87 (14.5) | 256 (11.2) | 9 (6.5) | |
| Non‐Hispanic Black | 203 (33.9) | 422 (18.5) | 23 (16.7) | |
| Non‐Hispanic White | 214 (35.8) | 1162 (50.9) | 77 (55.8) | |
| Other or multiracial | 23 (3.8) | 87 (3.7) | 3 (2.2) |
Abbreviations: BMI, body mass index; MI, myocardial infarction; NA, not applicable; SBP, systolic blood pressure; SD, standard deviation; TC, total cholesterol.
Data are given as n (%) or mean ± standard deviation. This table reports the baseline characteristics of individuals reporting MI because this was the largest studied group (n = 3019).
a
Denotes a statistically significant difference.
b
Mann–Whitney U test was used due to skewed distribution.