TABLE 1.
General characteristics of the Shift Work, Heredity, Insulin, and Food Timing (SHIFT) Study participants (n = 249) included in the present analysis1
| Participants | |
|---|---|
| n | 249 |
| Female gender, n (%) | 186 (74.7) |
| Race, n (%) | |
| Asian and Pacific Islander | 55 (22.1) |
| European | 187 (75.1) |
| South Asian | 7 (2.8) |
| Hispanic, n (%) | 17 (6.8) |
| Age, y | 29.0 ± 8.9 |
| BMI, kg/m2 | 24.07 ± 4.37 |
| Employed, n (%) | 224 (89.9) |
| Sleep duration, h | 7.78 ± 0.72 |
| Morningness-eveningness score2 | 52.81 ± 10.75 |
1
Values are mean ± SD or n (%).
2
Morningness-eveningness score was based on responses to the Morningness-Eveningness Questionnaire. The scores can range from 16 to 86, with lower scores indicating evening preference and higher scores indicating morning preference. Scores ≤41 indicate “evening types”; scores ≥59 indicate “morning types”; and scores of 42–58 indicate “intermediate types”.