Table 3. Bivariate and multiple logistic regression for unintentional sleep at work.
| Variable | Category | % | OR | 95%CI | adj ORa,b | 95%CI |
|---|---|---|---|---|---|---|
| Factors related to work | ||||||
|
| ||||||
| Responsibility for family income | Shared with someone | 52.4 | 1 | |||
| Alone | 47.6 | 1.07 | 0.84–1.35 | |||
| Work shift | Day | 5.6 | 1 | |||
| In legs that involve nights | 94.4 | 1.53 | 0.94–2.49 | |||
| Flight routes | National | 90.8 | 1 | |||
| International | 9.2 | 1.78 | 1.17–2.71 | |||
| Time working in the night shift | Does not work all night | 54.8 | 1 | |||
| 1 to 5 years | 17.8 | 1.12 | 0.83–1.52 | |||
| 6 to 10 years | 13.3 | 1.49 | 1.05–2.12 | |||
| 11 to 15 years | 5.5 | 2.80 | 1.57–5.01 | |||
| 16 years or more | 8.6 | 1.75 | 1.14–2.69 | |||
| Monthly flight hours | Up to 65 hours | 47.0 | 1 | 1 | ||
| 66 hours or more | 53.0 | 2.19 | 1.74–2.76 | 1.78 | 1.38–2.29 | |
| Maximum number of consecutive days of work | Up to 6 days | 81.6 | 1 | |||
| 7 days or more | 18.4 | 2.33 | 1.69–3.21 | |||
| Maximum number of consecutive nights of work | One or two nights | 17.2 | 1 | |||
| Three or four nights | 56.4 | 1.23 | 0.90–1.69 | |||
| Five or more nights | 26.4 | 1.60 | 1.12–2.29 | |||
| Average days off per month | 10 days or more | 41.7 | 1 | |||
| Up to 9 days | 58.3 | 1.71 | 1.36–2.15 | |||
| Frequency of operational flight delays | Never, rarely, or sometimes | 59.4 | 1 | 1 | ||
| Frequently or always | 40.6 | 2.06 | 1.62–2.61 | 1.45 | 1.11–1.89 | |
| Commuting time between hotel and airport | Up to 42 minutes | 68.8 | 1 | |||
| 42 minutes or more | 31.2 | 1.55 | 1.21–1.99 | |||
|
| ||||||
| Aspects of sleep | ||||||
|
| ||||||
| How do you sleep? | Very well or well | 51.9 | 1 | |||
| Neither well, nor bad | 37.5 | 1.63 | 1.28–2.09 | |||
| Fairly or very bad | 10.6 | 2.87 | 1.88–4.38 | |||
| Do you sleep enough? | Yes | 68.9 | 1 | 1 | ||
| No | 31.1 | 2.20 | 1.70–2.84 | 1.44 | 1.07–1.94 | |
| Quality of the hotel to sleep (noise, lighting, and thermal and physical comfort) | Above average | 51.8 | 1 | |||
| Below average | 48.2 | 1.47 | 1.17–1.84 | |||
| Quality of the sleeping cabin in the airplane (noise, lighting, and thermal and physical comfort) | Above average | 47.7 | 1 | |||
| Below average | 52.3 | 1.34 | 1.07–1.69 | |||
| Index of problems to wake up | No | 82.3 | 1 | |||
| Yes | 17.7 | 2.28 | 1.65–3.16 | |||
| Sleep quality index | Good | 92.4 | 1 | |||
| Bad | 7.6 | 2.49 | 1.52–4.08 | |||
| Obstructive sleep apnea syndrome | Low chance of developing | 79.7 | 1 | |||
| High chance of developing | 20.3 | 2.03 | 1.50–2.74 | |||
| Epworth score | Low sleepiness | 58.1 | 1 | 1 | ||
| Excessive sleepiness | 41.9 | 2.80 | 2.20–3.57 | 2.09 | 1.60–2.72 | |
|
| ||||||
| Health | ||||||
|
| ||||||
| Scale of the need for recovery after work | Less need | 31.8 | 1 | 1 | ||
| Moderate need | 34.7 | 1.72 | 1.30–2.26 | 1.06 | 0.77–1.47 | |
| Greater need | 33.5 | 3.30 | 2.46–4.42 | 1.49 | 1.04–2.16 | |
| Work ability index | Great | 33.7 | 1 | 1 | ||
| Good | 45.7 | 2.20 | 1.70–2.85 | 1.52 | 1.13–2.04 | |
| Moderate | 18.2 | 3.94 | 2.76–5.63 | 2.15 | 1.43–3.23 | |
| Low | 2.4 | 8.95 | 3.07–26.11 | 4.80 | 1.57–14.67 | |
a Adjusted for age, education, gender, marital status, and position
b Hosmer-Lemeshow = 0.94
Values with statistical significance are presented in bold.