Table 1.
Demographics, Health, and Sleep Characteristics of the Study Sample.
| Sample Size | % or Mean (SD) | |
|---|---|---|
| Sociodemographic variables | ||
| Age (years) | 79,161 | 56.55 (7.79) |
| Sex | 79,161 | |
| Female | 45,353 | 57.3% |
| Male | 33,808 | 42.7% |
| Townsend Deprivation Score | 79,072 | −1.82 (2.77) |
| Quintile 1 | 15,859 | −4.83 (0.55) |
| Quintile 2 | 15,767 | −3.59 (0.30) |
| Quintile 3 | 15,813 | −2.50 (0.34) |
| Quintile 4 | 15,819 | −0.87 (0.64) |
| Quintile 5 | 15,814 | 2.71 (1.82) |
| Ethnicity | 78,944 | |
| White | 76,840 | 97.3% |
| Mixed | 391 | 0.5% |
| Asian | 657 | 0.8% |
| Black | 507 | 0.6% |
| Chinese | 174 | 0.2% |
| Other | 375 | 0.5% |
| Work Status | 79,161 | |
| Working | 46,438 | 58.7% |
| Not working | 32,723 | 41.3% |
| Health-related Variables | ||
| BMI (kg/m2) | 79,161 | 26.61 (4.46) |
| Smoker: | 78,991 | |
| Yes | 5037 | 6.4% |
| No | 73,954 | 93.6% |
| Alcohol: | 79,128 | |
| Never | 4304 | 5.4 |
| Special occasions only | 7297 | 9.2 |
| 1–3 times pm | 8377 | 10.6 |
| 1–2 times pw | 19,669 | 24.9 |
| 3–4 times pw | 20,936 | 26.5 |
| Daily/Almost daily | 18,545 | 23.4 |
| Physical Activity(MET/h) | 77,576 | 35.91 (35.66) |
| Sedentary time (h/week) | 79,105 | 4.89 (2.13) |
| Diabetes mellitus Disgnosis | 2697 | 3.4% |
| HbA1c (mmol/mol) | 74,106 | 35.39 (5.50) |
| Systolic blood pressure (mm hg) | 75,537 | 138.76 (19.34) |
| Diastolic blood pressure (mm hg) | 75,538 | 81.58 (10.56) |
| Sleep-related variables | ||
|
Sleep Offest on Weekdays (hh:mm)
Sleep Offset on Weekends (hh:mm) Actual Weekday-Weekend Difference (h:mm) |
79,161 79,161 79,161 |
07:03 (01:02) 07:37 (01:11) 00:34 (01:13) |
| Absolute Weekday-Weekend Difference (h:mm) | 79,161 | 1:03 (00:50) |
| Self-Reported Sleep Duration (h:mm) | 78,992 | 7:11 (00:58) |