Stress and sleep quality in doctors working on-call shifts are associated with functional gastrointestinal disorders

Table 5 Risk factors for functional dyspepsia in univariate and multivariate analysis

	Univariate analysis		P value	Multivariate analysis		P value
	OR	95%CI		OR	95% CI
Age (yr)	0.91	0.79-1.03	0.136	1.166	0.96-1.42	0.131
Sex (female)	2.35	1.02-5.42	0.045	2.07	0.77-5.58	0.151
BMI (kg/m2)	1.00	0.96-1.02	0.686
Occupational position
Intern	Reference			Reference
Resident	0.37	0.16-0.85	0.019	0.28	0.12-0.68	0.005
Fellow	0.48	0.05-4.28	0.511	1.42	0.12-17.58	0.783
Marriage	2.18	1.05-3.36	0.001	2.73	1.08-6.39	0.039
Smoking	0.33	0.15-2.33	0.099	3.07	0.610-15.45	0.174
Drinking (≥ 1 d/wk)	2.38	1.02-3.60	< 0.0001	5.96	1.08-10.22	0.025
Duration of recent on-call work (mo)	0.32	0.28-0.67	0.001	0.64	0.31-2.94	0.076
Psychosocial alarm
None	Reference			Reference
Present	0.76	0.07-8.88	0.827	0.69	0.05-9.11	0.780
Serious	5.48	1.23-24.36	0.025	5.47	1.06-28.15	0.042
Length of sleep (h)	0.88	0.56-1.43	0.453
Poor sleep quality (PSQI ≥ 6)	0.28	0.04-0.72	< 0.0001	1.10	0.47-1.36	0.076
Working period (yr)	0.94	0.69-1.28	0.690

For the occupational position, the intern is the reference group. For the psychosocial alarm, the absence of psychosocial alarm is the reference group. BMI: Body mass index; PSQI: Pittsburgh Sleep Quality Index; OR: Odds ratio.