Table 4.

Hazard ratio (HR) and 95% confidence interval (CI) for anxiety or mood disorders by job stress in bus drivers.

Independent variable a	Model 1 a		Model 2 b		Model 3 c
	HR	95% CI	HR	95% CI	HR	95% CI
Demand-Control-Support Model
Psychological demands >30 (reference≤30)	1.39	0.62–3.14	1.47	0.65–3.32	1.63	0.71–3.72
Decision latitude >60 (reference ≤60)	1.61	0.72–3.60	1.78	0.78–4.04	1.95	0.85–4.43
High job strain (reference = low strain)	1.24	0.51–3.00	1.22	0.50–2.96	1.38	0.56–3.37
Job Fatigue Model
SOFI (reference <3)
3–4.9	1.85	0.56–6.08	1.82	0.55–6.00	2.15	0.64–7.22
≥5	2.96	1.10–7.95	2.93	1.08–7.92	3.35	1.23–9.09

^aEach independent variable (1–4) was solely included in the models.

^bAdjusted for age, body mass index, marital status, and education.

^cModel 1 and additionally adjusted for drinking, smoking, and exercise.

^d Model 2 and additionally adjusted for bus driving experience, shift work and history of chronic diseases.