Table 1.
Sociodemographic and Sleep Characteristics of Participants
| Characteristic | N = 8351 |
|---|---|
| Sex [female] | 483 (58%) |
| Age, years | 56.7 ± 5.6 |
| Ethnicity | |
| Caucasian | 768 (92%) |
| Aboriginal | 4 (0.5%) |
| Polynesian | 5 (0.6%) |
| Vietnamese | 3 (0.4%) |
| Chinese | 23 (2.8%) |
| Indian | 26 (3.1%) |
| Other | 4 (0.5%) |
| Unknown | 2 |
| Relationship status | |
| Never Married | 18 (2.2%) |
| Married | 582 (72%) |
| Widowed | 16 (2.0%) |
| Divorced | 108 (13%) |
| Separated | 35 (4.3%) |
| De facto | 49 (6.1%) |
| Unknown | 27 |
| Education level# | |
| High school or less | 179 (22%) |
| Training after school | 302 (38%) |
| University | 322 (40%) |
| Unknown | 32 |
| Personal income | |
| Low | 217 (27%) |
| Middle | 229 (29%) |
| High | 347 (44%) |
| Unknown | 42 |
| Shift Worker | |
| Unknown | 715 (88%) |
| BMI, kg/m2 | 28.3 ± 5.6 |
| Smoker [yes] | 71 (8.9%) |
| Unknown | 36 |
| Alcohol | |
| Alcohol: Abstainer | 255 (33%) |
| Medium consumer | 393 (50%) |
| High consumer | 134 (17%) |
| Unknown | 53 |
| Depression symptoms | 121 (15%) |
| Unknown | 49 |
| Diabetes [yes] | 64 (8.0%) |
| Unknown | 32 |
| Insomnia symptoms [present] | 119 (14%) |
| Excessive daytime sleepiness [yes] | 76 (9.1%) |
| PSQI self-reported sleep duration, hours | 7.0 ± 1.1 |
| Unknown | 1 |
| Actigraphy sleep duration on PSG night, hours | 6.5 ± 0.8 |
| Polysomnography total sleep time, hours | 5.9 ± 1.0 |
| AHI, events/hour | 14.6 ± 16.6 |
| OSA severity | |
| OSA Free | 248 (30%) |
| Mild | 327 (39%) |
| Moderate | 151 (18%) |
| Severe | 109 (13%) |
| 3% Oxygen desaturation index, desaturations/hour | 8.6 (13.6) |
| Arousal index, events/hour | 12.4 ± 14.2 |
| Sleep efficiency, % | 78.0 ± 11.5 |
| Sleep onset latency, hours | 0.3 ± 0.3 |
| Wake after sleep onset, hours | 1.2 ± 0.7 |
1 n (%); Mean ± SD.
Abbreviations: BMI, body mass index.
OSA Severity is classified according to AASM guidelines 2012 [27].
#The highest education for three individuals was primary school, their demographics are pooled with individuals whose highest education level was high school.