Table 3. Hierarchic logistic regression analysis.
Relationship between predictor variables investigated and near miss accidents (NMAs).
| Variable | Model I | Model II | Model III | Model IV | Model V | Model VI |
|---|---|---|---|---|---|---|
| OR (95%CI) | OR (95%CI) | OR (95%CI) | OR (95%CI) | OR (95%CI) | OR (95%CI) | |
| Age(years) | 1.01 (0.98–1.02) | 0.99 (0.97–1.02) | 0.99 (0.97–1.02) | 0.99 (0.97–1.02) | 1.00 (0.97–1.02) | 0.99 (0.97–1.02) |
| Coffee drinking(cups/day) | 0.95 (0.84–1.10) | 0.94 (0.83–1.06) | 0.91 (0.80–1.04) | 0.91 (0.80–1.04) | 0.92 (0.81–1.05) | 0.92 (0.81–1.04) |
| Smoking(packs/day) | 1.04 (0.85–1.26) | 1.02 (0.84–1.25) | 1.90 (0.89–1.33) | 1.09 (0.89–1.33) | 1.10 (0.89–1.35) | 1.09 (0.89–1.34) |
| SuspectOSA | 2.74 (1.73–4.34)*** | 2.51 (1.57–4.02)*** | 2.37 (1.46–3.82)*** | 2.48 (1.53–4.03)*** | 2.39 (1.47–3.87)*** | |
| Sleepdebt(hours) | 1.49 (1.27–1.75)*** | 1.50 (1.27–1.76)*** | 1.53 (1.30–1.81)*** | 1.49 (1.27–1.76)*** | ||
| EDS (ESS >10) | 1.52 (0.85–2.74) | 1.50 (0.83–2.72) | 1.54 (0.85–2.78) | |||
| Rest breaks | 0.49 (0.29–0.82)** | |||||
| Naps | 0.52 (0.32–0.85)** | |||||
| R2 | 0.001 | 0.04 | 0.09 | 0.10 | 0.11 | 0.11 |
Significance
*: < 0.05
** <0.01
*** = p<0.001
Model 1 = Demographic and lifestyle variables; Model II: including pathology; Model III: including sleep debt; Model IV: including EDS; Models V-VI: including remedies.
Note OR: odds ratio; 95%CI: confidence interval; R2: determination coefficient. Suspect OSA: Obstructive sleep apnea, as evaluated with the Berlin Questionnaire and medical examination; Sleep debt: reported hours of sleep—desired hours of sleep; EDS: excessive daytime sleepiness, as evaluated by the Epworth Sleepiness Scale; MVAs: motor vehicle accidents; NMAs: near miss accidents