Table 4.

Output of the logistic regression analysis

Variables	Nodding at the wheel		Sleepiness after night shift		Near-miss car accident		Confidence in complex tasks		Needle stick injuries
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Age range
20–29 years	1.0	–	1.0	–	1.0	–	1.0	–	1.0	–
30–39 years	1.49	0.68–3.26	1.03	0.45–2.32	0.78	0.35–1.73	0.72	0.30–1.69	0.40	0.15–1.08
40–49 years	0.97	0.41–2.33	0.63	0.26–1.57	0.64	0.26–1.56	0.40	0.13–1.21	0.18	0.04–0.86
≥50 years	0.72	0.28–1.87	0.58	0.22–1.53	0.16	0.05–0.52	0.22	0.47–1.06	0.10	0.12–0.83
Gender (female versus male)	2.04	0.48–8.64	2.25	0.56–9.11	0.43	0.10–1.85	1.04	0.27–3.96	0.30	0.09–1.01
BMI
17–24.9	1.0	–	1.0	–	1.0	–	1.0	–	1.0	–
25–29.9	1.01	0.48–2.09	1.51	0.71–3.23	1.51	0.71–3.23	1.38	0.57–3.35	0.90	0.33–2.46
30+	1.18	0.54–2.57	0.77	0.35–1.73	1.05	0.46–2.36	0.77	0.29–1.99	0.55	0.18–1.71
ESS ≤ 10	1.0	–	1.0	–	1.0	–	1.0	–	1.0	–
ESS ≥ 11	2.10	1.02–4.30	3.64	1.64–8.07	2.75	1.31–5.77	2.64	1.20–5.84	0.30	0.09–1.01